Reduce,Co2,Emission,Concept.,Renewable,Energy-based,Green,Businesses,Can,Limit

The current rate of atmospheric carbon dioxide (CO2) increase is 10 times faster in the present day than at any other point in the <a href="https://www.earth.com/news/co2-levels-linked-to-cascading-effects-that-last-for-millennia/" target="_blank" rel="noreferrer noopener">past 50,000 years</a>. 



This finding, based on a detailed chemical analysis of ancient <a href="https://www.earth.com/news/antarctica-ice-shelves-melting-faster-due-to-ocean-currents/" target="_blank" rel="noreferrer noopener">Antarctic ice</a>, provides crucial insights into abrupt climate change periods in Earth's history and sheds light on the potential impacts of climate change today.



The study, led by Kathleen Wendt, an assistant professor in Oregon State University's College of Earth, Ocean, and Atmospheric Sciences (<a href="https://ceoas.oregonstate.edu/" target="_blank" rel="noreferrer noopener">CEOAS</a>), and published in the Proceedings of the National Academy of Sciences, emphasizes the unprecedented nature of the current CO2 rise. 



"Studying the past teaches us how today is different. The rate of CO2 change today really is unprecedented," Wendt stated. "Our research identified the fastest rates of past natural <a href="https://www.earth.com/news/jurassic-rocks-reveal-new-details-about-earths-climate-system/" target="_blank" rel="noreferrer noopener">CO2 rise ever observed</a>, and the rate occurring today, largely driven by human emissions, is 10 times higher."



<h2 class="wp-block-heading" id="h-how-co2-increases-impact-climate-change">How CO2 increases impact climate change</h2>



Carbon dioxide, a naturally occurring greenhouse gas, plays a significant role in the Earth's climate. When CO2 enters the atmosphere, it contributes to the warming of the climate through the greenhouse effect. 



While CO2 levels have fluctuated in the past due to <a href="https://www.earth.com/news/ice-age-data-analysis-reshapes-climate-future-lowers-warming-estimates/" target="_blank" rel="noreferrer noopener">ice age cycles</a> and other natural causes, today's rising levels are primarily attributed to human emissions.



<h2 class="wp-block-heading" id="h-unearthing-the-secrets-of-antarctic-ice">Unearthing the secrets of Antarctic ice</h2>



To analyze past climate conditions, scientists drill cores up to 2 miles (3.2 kilometers) deep into the <a href="https://www.earth.com/news/antarctic-ice-shelves-are-fracturing-from-meltwater-weight/" target="_blank" rel="noreferrer noopener">Antarctic ice</a>, which has built up over hundreds of thousands of years. 



The ice contains ancient atmospheric gases trapped in air bubbles, allowing researchers to study trace chemicals and reconstruct past climate records.



Previous research had indicated several periods during the <a href="https://www.earth.com/news/antarctica-suffered-extremely-rapid-ice-loss-after-the-last-ice-age-alarming-scientists/" target="_blank" rel="noreferrer noopener">last ice age</a>, which ended about 10,000 years ago, where carbon dioxide levels appeared to jump much higher than the average. 



However, those measurements lacked the necessary detail to fully understand the nature of these rapid changes, limiting scientists' ability to comprehend the underlying processes.



<h2 class="wp-block-heading" id="h-rapid-co2-increases-throughout-history">Rapid CO2 increases throughout history</h2>



Intrigued by these findings, Wendt and her colleagues set out to investigate these periods in greater detail using samples from the <a href="https://www.earth.com/news/west-antarctic-ice-sheet-melting-will-accelerate-regardless-of-climate-action/" target="_blank" rel="noreferrer noopener">West Antarctic Ice Sheet Divide</a> ice core. 



They identified a pattern revealing that the jumps in carbon dioxide coincided with North Atlantic cold intervals known as Heinrich Events, which are associated with abrupt climate shifts worldwide.



Christo Buizert, an associate professor in the College of Earth, Ocean, and Atmospheric Sciences and co-author of the study, described the significance of these events.



"These Heinrich Events are truly remarkable. We think they are caused by a dramatic collapse of the North American ice sheet. This sets into motion a chain reaction that involves changes to the tropical monsoons, the Southern hemisphere westerly winds and these <a href="https://www.earth.com/news/changes-in-ocean-circulation-linked-to-drastic-rise-in-co2-levels/" target="_blank" rel="noreferrer noopener">large burps of CO2</a> coming out of the oceans," Buizert explained.



<h2 class="wp-block-heading" id="h-unprecedented-rate-of-co2-rise">Unprecedented rate of CO2 rise</h2>



The study found that during the largest of the natural CO2 rises, the concentration increased by about 14 parts per million in 55 years, occurring approximately once every 7,000 years. 



In stark contrast, at today's rates, that magnitude of increase takes only 5 to 6 years, highlighting the unprecedented nature of the <a href="https://www.earth.com/news/met-office-2024-co2-levels-will-surpass-the-point-of-no-return/" target="_blank" rel="noreferrer noopener">current CO2 rise</a>.



<h2 class="wp-block-heading" id="h-role-of-westerly-winds-and-the-southern-ocean">Role of westerly winds and the Southern Ocean</h2>



Evidence suggests that during past periods of natural carbon dioxide rise, the strengthening of westerly winds played a crucial role in the circulation of the deep ocean, leading to a rapid release of CO2 from the <a href="https://www.earth.com/news/acidity-levels-of-antarctic-waters-will-soon-double-harming-life/" target="_blank" rel="noreferrer noopener">Southern Ocean</a>. 



Other research has indicated that these westerlies are likely to strengthen over the next century due to climate change. The new findings suggest that if this occurs, it will reduce the Southern Ocean's capacity to absorb human-generated carbon dioxide.



Wendt emphasized the importance of this finding: "We rely on the <a href="https://www.earth.com/news/antarctica-ice-shelves-melting-faster-due-to-ocean-currents/" target="_blank" rel="noreferrer noopener">Southern Ocean</a> to take up part of the carbon dioxide we emit, but rapidly increasing southerly winds weaken its ability to do so."



<h2 class="wp-block-heading" id="h-importance-of-understanding-earth-s-climate-past">Importance of understanding Earth's climate past</h2>



This disturbing study highlights the significance of understanding Earth's climate history in the context of current climate change. 



By unraveling the secrets hidden within ancient <a href="https://www.earth.com/news/ice-sheet-fracture-sets-a-speed-record-in-antarctica/" target="_blank" rel="noreferrer noopener">Antarctic ice</a>, researchers have provided valuable insights into the potential impacts of rapidly increasing CO2 levels and the role of the Southern Ocean in absorbing human-generated carbon dioxide.



As we face the challenges of a changing climate, studies like this underscore the need for continued research and action to mitigate the effects of human-induced climate change. By learning from Earth's past, we can better understand and prepare for the future of our planet.



The full study was published in the journal <a href="https://pnas.org/doi/10.1073/pnas.2319652121" target="_blank" rel="noreferrer noopener">Proceedings of the National Academy of Sciences</a>.



—–



Like what you read?&nbsp;<a href="https://www.earth.com/subscribe/" target="_blank" rel="noreferrer noopener">Subscribe to our newsletter</a>&nbsp;for engaging articles, exclusive content, and the latest updates.&nbsp;



Check us out on&nbsp;<a href="https://www.earth.com/earthsnap/" target="_blank" rel="noreferrer noopener">EarthSnap</a>, a free app brought to you by&nbsp;<a href="https://www.earth.com/author/eralls/" target="_blank" rel="noreferrer noopener">Eric Ralls</a>&nbsp;and Earth.com.



—–

CO2 increase is 10 times faster today than in the past 50,000 years

The current rate of atmospheric carbon dioxide (CO2) increase is 10 times faster in the present day than at any other point in the past 50,000 years. This finding, based on a detailed chemical analysis of ancient Antarctic ice, provides crucial insights into abrupt climate change periods in Earth's history and sheds light on the potential impacts of climate change today. The study, led by Kathleen Wendt, an assistant professor in Oregon State University's College of Earth, Ocean, and Atmospheric Sciences (CEOAS), and published in the Proceedings...

Many scientists and environmental activists worry about the possible extinction of various species of <a href="https://www.earth.com/news/animals-use-tools/">primates</a>. A new study led by <a href="https://duke.edu/">Duke University</a> argues that the demise of threatened primates could also trigger the extinction of many species of parasites that live in and on them.&nbsp;



Due to human activities such as deforestation, hunting, or trapping, a large number of primates are at risk of extinction. Currently, 108 of the 213 primate species from the <a href="https://www.iucn.org/">International Union for Conservation of Nature</a>’s dataset are considered endangered. However, scientists rarely think about the even larger number of parasite species that will disappear together with these primates.



"If all the primates that are threatened with extinction really do die out, they won't be the only species that go extinct," said study first author James Herrera, a researcher at the <a href="https://lemur.duke.edu/">Duke Lemur Center</a>. "It could also be twice that many parasites. That's a whole realm of biodiversity that could be going extinct without us even noticing.”&nbsp;



As Herrera acknowledges, it might seem weird to worry about these parasites, considering all our efforts to deworm and delouse our pets. However, many parasites are not dangerous for their hosts, and can even have surprising benefits, such as protecting against other infections or keeping autoimmune disorders in check.&nbsp;



“There's so little that we know about what they do in the body, that we don't even know what we're losing," he said. As previous studies show, 85 to 95 percent of the parasitic worms of animals are not even known to science yet. Thus, their potential benefits are far from being understood.&nbsp;



To estimate the potential loss of biodiversity primate extinctions could cause, Herrera and his colleagues used network analysis to measure the potential ripple effects on the parasites camping in or on primates.



They discovered that the 213 primates they studied were connected in complex webs of interaction with 763 species of worms, mites, protists, and other parasites. When a primate host dies, the parasites need to find another host in order to survive. However, if an entire primate species goes extinct, the parasites connected to it might have no other suitable hosts and disappear too.&nbsp;



Herrera and his team have found that if the 108 endangered primate species go extinct, 250 species of parasites could be doomed as well. Further research is needed to fully understand these complex inter-species connections and the ecosystemic risks their extinction might give rise to.



The study is published in the journal <a href="https://royalsocietypublishing.org/doi/10.1098/rstb.2020.0355">Philosophical Transactions of the Royal Society B</a>.&nbsp;&nbsp;&nbsp;&nbsp;



---



By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

If primates go extinct, so will their parasites

Many scientists and environmental activists worry about the possible extinction...

It is notoriously difficult to determine the age of a lobster. In a new study, researchers at the <a href="https://www.uea.ac.uk/">University of East Anglia</a> (UEA) have managed to identify a way of accurately determining age based on modifications in the lobster’s DNA.



For decades, experts have pondered how old lobsters can get, with some estimates rising even to a century or more. However, scientists could not find reliable methods to determine their exact age. This has been a problem, since knowing how many individuals of particular ages are present in a given area is important in order for them to be sustainably harvested.



“Until now, a lobster's age has usually been estimated using its size - but this is inaccurate as individual lobsters grow at different rates,” explained Dr. Martin Taylor from UEA’s <a href="https://www.uea.ac.uk/about/school-of-biological-sciences">School of Biological Sciences</a>. 



“For a long time, it appeared that there was no accurate way to quantify a lobster’s age. Some research suggested that you could tell a lobsters age by counting the rings in parts of their eyestalks and stomach – a little like counting tree rings. But you can’t do that for a living lobster.”



Recently, UEA scientists, in collaboration with the <a href="https://www.nationallobsterhatchery.co.uk/">National Lobster Hatchery</a> and the <a href="https://www.cefas.co.uk/">Centre for Environment, Fisheries and Aquaculture Science</a> (CEFAS), have developed a new DNA technique&nbsp;that could solve this problem. By quantifying DNA changes that accumulate within lobsters as they age, accurate indications of their ages have been found.



“We identified a very strong relationship between age and DNA modifications, which allowed us to accurately estimate the ages of individual lobsters,” said Dr. Taylor. 



“Applying this method to wild lobsters predicted ages that generally aligned with minimum estimates of age based on size.&nbsp;Our method shows great promise as a tool for improved management of the European lobster where information regarding the age-structure of stocks is currently missing.”



According to Dr. Carly Daniels, head of production science and development at the National Lobster Hatchery, knowing lobsters’ precise ages will help fisheries, scientists and conservationists alike to understand, manage and conserve our vulnerable lobster stocks.



The study is published in the journal&nbsp;<a href="https://onlinelibrary.wiley.com/journal/17524571">Evolutionary Applications</a>.&nbsp;



---



By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

DNA technique can help estimate the age of lobsters

It is notoriously difficult to determine the age of a...

Brazil gets two-thirds of its energy from hydropower and has numerous large hydropower storage reservoirs that are fed by perennial <a href="https://www.earth.com/news/more-than-half-of-the-worlds-rivers-run-dry-each-year/">rivers</a>. Although it is usually understood that the construction and operation of hydropower systems reduce the river flow downstream due to the increase in evaporation, a recent study suggests that in humid conditions, as found in parts of Brazil, hydropower&nbsp;<a href="https://www.sciencedirect.com/topics/engineering/reservoir-storage">storage reservoirs</a>&nbsp;actually contribute to increasing the flow of the river upstream of the reservoir.



“It is widely accepted that river flow impacts reservoir levels. This is true on a weekly and monthly scale. However, on an annual scale the level of the reservoirs actually has a greater effect on the inflow of the river in the southeast of Brazil,” explained study leader Julian Hunt, a researcher in the IIASA Energy, Climate, and Environment Program.



In fact, the study finds that large storage reservoirs in southeastern Brazil can double the flow of rivers if the reservoirs are full, when compared with the effect of empty reservoirs. This finding has significant implications for water and energy management in the region, which is currently experiencing a historic drought and associated energy crisis.&nbsp;



The researchers explain that humidity is high during the wet season in the south-eastern region of Brazil. This reduces evaporation from the surface of reservoirs but it also increases the chances of precipitation in the area because any additional evaporation from a large body of water (storage reservoir) adds significantly to the high moisture content of the environment. Therefore, the higher the hydropower reservoir level, the higher the precipitation and the larger will be the inflow of the associated river.&nbsp;



The researchers analyzed river flow into eight dammed reservoirs in the region, which is Brazil’s most important for the production of hydropower. They compared the natural inflow of the rivers prior to damming in 1970 with water flow today, during the wet and dry seasons.&nbsp;



The team then compared the dam reservoir levels at the end of the dry season (October), with the average inflow recorded at the start of the following wet season (November). The data was used in correlation analyses to understand the potential impact of the reservoir level on the incoming river flow.



The results show that the flow of the rivers into all dams increased by an average of 112% if the reservoir was full in October, compared to if the reservoir was empty.&nbsp;



The researchers conclude that hydropower storage reservoirs have a significant impact on river flow in this region of Brazil and that keeping them full will alleviate some of the effects of drought, including decreases in the production of energy and increases in the costs of food.



Additionally, the study authors recommend that in order to improve current conditions, the smaller reservoirs at the heads of inflowing rivers should be filled first, followed by the larger ones. They calculate that reservoir storage levels at the end of October should be 78 percent full and the hydropower plants in cascade should operate with a capacity factor of 50 percent.&nbsp;



The findings help to explain why the river flow in southeastern Brazil decreased by 60 percent within one year of the start of the drought in 2014. Reservoir levels were allowed to drop significantly at that time and this could have exacerbated the problem by reducing the flow of incoming rivers even further.&nbsp;&nbsp;



“We should realize that managing water, land and other resources is not just a way to adapt to a changing climate. It can also affect the climate itself,” said Hunt.



The study is published in the journal&nbsp;<a href="https://www.journals.elsevier.com/energy">Energy</a>.



---



By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Storing more water could alleviate Brazil’s food and energy crisis

Brazil gets two-thirds of its energy from hydropower and has...

According to a new <a href="https://marine.copernicus.eu/news/ocean-state-report-5-summary-now-available">report</a> funded and published by the <a href="https://marine.copernicus.eu/">Copernicus Marine Service</a>, sea levels around the world are rising at an alarming rate due to climate change. Through ocean measurements, satellite observations, and computer modelling, a team of 150 scientists from 30 renowned European institutions reported annual sea-level rises of 0.12 inches, which are higher than any of those observed in the last century.&nbsp;



Sea level rise is mainly caused by the melting of Arctic sea ice. The scientists found that from 1979 to 2020, the size of the area of lost sea ice is equivalent to about six times the size of Germany.&nbsp;



“Even though the polar regions are remote we feel their losses because they disturb the oceans that surround us,” explained Andrew Shepherd, professor of Earth Observation at the <a href="https://www.leeds.ac.uk/">University of Leeds</a>. “Whether it's rising sea levels driving more frequent coastal flooding, or reduced sea ice cover altering global weather patterns, we are increasingly vulnerable to these changes.”&nbsp;



A clear example of what extreme events such phenomena could cause is the repeated flooding of Venice during the past few years, with water rising by more than 6 feet (1.89 meters).



In addition to rising sea levels, the report also addressed other dangers that the oceans are currently facing, including: extreme temperature variability; increases in salinity and acidification; nutrient pollution from land-based activities such as industry or farming; the forced migration of various species of marine animals due to habitat loss; and increased plant growth that leads to reduced oxygen levels and blocks the sunlight. All of these stressors can have severe effects on coastal environments and marine biodiversity.



According to Karina von Schuckmann, oceanographer at the Copernicus Marine Service, the oceans are fundamental for regulating the Earth’s climate and sustaining life.&nbsp;



“Accurate and timely monitoring and reporting is crucial for understanding the ocean so we can adapt to its changes,” said von Schuckmann.



“The Ocean State Report highlights the necessity of governance to help us all work together to reduce harmful effects and adapt to protect this most precious resource and its ecosystems.”



---



By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Sea levels are rising at an alarming rate

According to a new report funded and published by the...

It is a well known fact that climate change will heat up the Earth, but new research from the <a href="https://www.umass.edu/">University of Massachusetts Amherst</a> has focused on exactly how fast global warming will affect the Northeast coast of the United States from Maine to Delaware.&nbsp;



The researchers concluded that the Northeast is heating faster than the majority of North America as a result of drastic changes in the atmosphere above the North Atlantic.&nbsp;



While investigating what global warming means for the Northeast, in particular, study lead author Ambarish Karmalka found evidence of the rapid rates of coastal warming in the Northeast and Atlantic in comparison to other regions.



“The key findings here are that the observed warming in coastal Northeast is exceptional,” explained Karmalkar. “Some of the biggest populations centers in the U.S. are suffering the greatest degree of warming, and that this warming is being driven both by equally rapid trends in the Atlantic Ocean and by changes in atmospheric circulation patterns.”&nbsp;&nbsp;



Further problems are being caused by the decreasing speed of the Atlantic Meridional Overturning Circulation (AMOC). This is a belt of water that transports warm, salty water to the north from the tropics, which then sinks and cools. Deep water currents will form, transporting the cooled water back south, but this process is slowing due to global warming.&nbsp;



&nbsp;“One consequence of this conveyor belt slowdown is more heating of the ocean off the Northeastern coast, which helps to explain the spike in ocean temperatures in the Mid-Atlantic regions,” said Karmalkar.



An additional sign of rising temperatures in the Northeast is the link between the AMOC and the North Atlantic Oscillation (NAO). This is a weather phenomenon that governs the wind's strength and position when blowing from the US, over the Atlantic, and on to Europe.&nbsp;



The NAO influences storm tracks, the jet stream and seasonal temperatures in the Northeast, and is naturally variable in behaviour.



However, Karmalkar and study co-author Radley Horton from Columbia University show that the varying behavior of the NAO has recently settled into a pattern which has increased the influence of ocean air on the eastern seaboard climate.



As a result, warmer ocean air is being blown over the coastal Northeast and heating up land temperatures.&nbsp;



In addition to this discovery, the research is significant as it highlights the importance of high resolution climate models for understanding global warming.



“Our research implies that without improved high-resolution data, regional climate assessments, which inform our ability to plan for the future, may underemphasize warming in this populous region," said Karmalkar.



The study is published in the journal <a href="https://www.nature.com/nclimate/">Nature Climate Change</a>.



---



By <a href="mailto:calumvaughan05@gmail.com">Calum Vaughan </a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Why is the Northeast coast a global warming hotspot?

It is a well known fact that climate change will...

A new comprehensive report on the status of oceans worldwide warns of unprecedented levels of climate change, including the warming of the <a href="https://www.earth.com/news/heat-in-the-north-pacific-linked-to-unusual-ozone-hole/">Arctic</a> Ocean, a 90 percent reduction of sea ice thickness in the Barents Sea, extreme variability in the North Sea, and record sea levels in the Mediterranean. The Copernicus Marine Service Ocean Report, led by <a href="https://www.mercator-ocean.fr/en/">Mercator Ocean international</a> (MOi), drew upon the expertise of over 120 scientists from more than 30 European institutions.



Scientists have discovered that Arctic sea levels have reached record lows in the past two years, dropping by nearly 13 percent per decade from 1979 to 2020. The warming of the Arctic Ocean contributed to four percent of the whole global ocean warming.&nbsp;



The near 90 percent reduction of ice levels in the Barents sea led to a significant&nbsp; decrease in sea ice import from the polar basin, while the variable heat spells and cold waves characterizing the North Sea caused changes in fishing patterns.&nbsp;



“Climate change, pollution, and overexploitation have placed unprecedented pressures on the ocean requiring the urgent need for sustainable measures for governance, adaptation, and management in order to secure the various life support roles the ocean offers for human well-being,” said study leader Dr. Karina von Schuckmann, an oceanographer at MOi.&nbsp;



“Scientifically-sound knowledge derived from high-quality ocean products and delivered by ocean services is critical to stimulate transformative change. Considering the ocean as a fundamental factor in the Earth system and embracing the multidimensional and interconnected nature of the ocean is the bedrock for a sustainable future."



In order to address these challenges, new tools and technologies are needed. These include alert systems, forecasting technologies, and real-time monitoring programs that will help protect both marine environments and the human communities that depend on them.



“This issue of the Copernicus Ocean State Report provides insight into the design and functioning of downstream tools and is approached from several angles, presenting the state of the changing ocean, examining evolving impacts of the changing ocean in line with climate change on environmental, human, social, and economic systems, and discussing the importance of science, data and services for society and policy in adapting to these impacts,” explained Dr. von Schuckmann.



The report is published in the <a href="https://www.tandfonline.com/doi/full/10.1080/1755876X.2021.1946240">Journal of Operational Oceanography</a>.



---



By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Ocean systems are buckling under unprecedented pressure

A new comprehensive report on the status of oceans worldwide...

Today is the autumn equinox, which marks the astronomical start of fall in the Northern Hemisphere, and the beginning of spring in the Southern Hemisphere.&nbsp;



The fall equinox is one of just two days each year when the number of daytime and nighttime hours are nearly equal all over the world. On this day, most of the Earth experiences about 12 hours of daylight and 12 hours of darkness.



"In the Northern hemisphere, the September equinox marks the start of a period bringing us later sunrises and earlier sunsets," explained NASA. "We will also feel cooler days with chillier winds, and dry, falling leaves."



At 3:21 p.m. EST on September 22, the sun appeared to shine directly over the equator. Beyond this point, the Northern Hemisphere will have progressively fewer daylight hours (and more hours of darkness) as our planet slowly tilts its South Pole towards the sun.



Earth is tilted on its axis. This means that as our planet orbits the sun, more light reaches the Northern or Southern Hemisphere according to where Earth is positioned.&nbsp;



During the two equinoxes in spring and fall, however, sunlight equally illuminates both hemispheres.&nbsp;



'The Earth takes one year (or 365-and-a-quarter days) to orbit once around the Sun and it is tilted over slightly on its axis,"explained Anna Ross, an astronomer at the Royal Observatory Greenwich.&nbsp;



"So for half of the year, the Northern Hemisphere is tilted slightly towards the sun, meaning we have longer daylight hours and hotter temperatures."



"For the other half of the year, we are tilted slightly further away from the Sun so we have longer nights and colder weather. It's this tilt that gives us our seasons."



In the Northern Hemisphere, the fall equinox begins the countdown to the shortest day of the year and the start of winter on December 21, which is known as the winter solstice.



The winter and summer solstices occur when the planet's north or south pole is most greatly inclined with toward or away from the Sun.&nbsp;



'There are two points in the year where the Earth’s tilt is at its most extreme relative to the Sun,' said Ross. 'These days are known as the solstices."



"On these dates, depending on which hemisphere you live in, you will either experience midsummer with the longest day of the year or midwinter with the longest night."



"In between both of these extremes, we get our spring and autumn months, with the exact midpoints being the equinoxes."



---



By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Fall has officially arrived in the Northern Hemisphere

Today is the autumn equinox, which marks the astronomical start...

Intricate geological formations such as star-shaped dunes and sandstone arches are somewhat mysterious; they appear almost designed but are shaped by somewhat random natural forces. A new study conducted by researchers at <a href="https://www.aalto.fi/en">Aalto University</a> sought to recreate the formation of geological features created by wind and water.



The researchers arranged 100 tiny metal balls on a vibrating silicone plate and used a camera and smart algorithm to watch and manipulate the balls.



“We used the camera to determine the location of the particles, and the algorithm selected the most appropriate vibration frequency to move the particles in the desired direction," explained study lead author Quan Zhou.



"The particles move across the plate in a particular direction depending on the vibration frequency, and the same frequency can cause very different directions of movement in different parts of the plate.”



The scientists were surprised to see how well the algorithm was able to control the shapes that were formed by the tiny balls.&nbsp;



"The movement of the particle swarm is similar to natural phenomena in which natural materials are shaped by the power of wind and water. The method should work at both smaller and larger scales, and could have many future applications where using hands or tools is difficult," said doctoral candidate Artur Koptica.



The researchers hope that this new technique of manipulating matter could be used in manufacturing products in the near future by replacing skilled artisan workers or molds with an algorithm.&nbsp;



A question that still needs to be answered is how many of these metal balls can be manipulated at one time and thus to what scale can the process be used. The research team previously looked at the use of vibrating plates to manipulate matter, but using them to form shapes is new, uncharted territory.&nbsp;



The study is published in the journal <a href="https://www.science.org/journal/sciadv">Science Advances</a>.



---



By <a href="mailto:zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Recreating the power of wind and water to manipulate materials

Intricate geological formations such as star-shaped dunes and sandstone arches...

Microplastics are tiny fragments (less than 0.2 in or 5 mm in length) of any type of plastic that are found in the <a href="https://www.earth.com/news/pandas-can-thrive-in-less-than-perfect-environments/">environment</a>. They have been identified in oceans, fresh water and air, as well as in our food, drinks and house dust.&nbsp;



Microplastics enter the environment in one of two ways: tiny, man-made particles such as microfibers from clothing and microbeads from cosmetics, or plastic pellets from packaging, are already less than 0.2 in when they are disposed of; larger plastic items degrade and fragment due to natural weathering processes in the environment.



Because microplastics have a ubiquitous distribution it is not surprising that they have been found in the feces of humans and pets. Their effects on human health are not yet known.&nbsp;



It used to be thought that the plastic particles passed through the digestive system without causing damage. Now, it is understood that some fragments pass through, some get lodged in the stomach and intestinal lining, and the very tiniest particles move into the bloodstream and travel to organs and cells. Studies on laboratory animals have shown that exposure to microplastics can cause inflammation, cell death and metabolic disorders.&nbsp;



In a recent pilot study, reported in the American Chemical Society’s <a href="https://pubs.acs.org/journal/estlcu">Environmental Science &amp; Technology Letters</a>, a team of scientists led by Kurunthachalam Kannan from the New York University School of Medicine assess the levels of human exposure to two common microplastics - polyethylene terephthalate (PET) and polycarbonate (PC) - by measuring levels in infant and adult feces.



The researchers used fecal samples from six infants and 10 adults in New York State, along with three samples of meconium (a newborn infant’s first stool). Mass spectrometry was used to determine the concentrations of PET and PC microplastics in the samples.&nbsp;



The experts found at least one type of plastic present in every sample and, although levels of PC microplastics were similar in adult and infant stools, feces from infants contained, on average, 10 times higher concentrations of PET than feces from adults.&nbsp;



The authors hypothesize that infants are exposed to higher levels of PET plastics through their extensive use of drinking bottles, teethers and toys, all of which are in regular and direct contact with the mouth. Further, more detailed studies are needed in order to corroborate these findings, they say.



---



By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Infants carry higher levels of microplastics than adults

Microplastics are tiny fragments (less than 0.2 in or 5...

On the 14th of July, an amount of <a href="https://www.earth.com/news/rainfall-will-become-harder-to-predict-with-climate-change/">rain</a> that usually would’ve fallen over several months came pouring down in the Eifel region of Germany, causing massive flooding. The extreme precipitation event was far more destructive than scientific models predicted, leading climate scientists at the <a href="https://www.gfz-potsdam.de/en/home/">Helmholtz Centre Potsdam</a> to ask new questions.



"As climate change continues, we may encounter precipitation events like the one on 14 July 2021 quite frequently," explained Dr. Michael Dietze, lead researcher on a paper published in the journal <a href="https://www.science.org/">Science</a>.



"Therefore, research must now begin to understand precipitation-induced floods not only as a phenomenon of too much fast-flowing water. We also have to include the associated self-reinforcing effects, some of which are also favored by climate change."



As climate change continues to intensify, extreme precipitation events are going to become more common, making it all the more important to understand them. In advance of the flood, scientists set up seismic measuring devices, in order to measure ground movement during rain and potentially flooding. Unfortunately, these seismic stations themselves were flooded and lost in short order.&nbsp;



The soil quickly filled up with water. Since the soil had lost its capacity to absorb more water, the flooding moved over the land hundreds of times faster than usual. This, in turn, led to flash flooding across the valleys.&nbsp;



The water tore across the land, unleashing erosive powers - digging channels, carrying debris to catch on bridges. A dam quickly eroded, threatening a breach that never quite happened.&nbsp;



The Steinbach Dam holds back 1.2 million cubic meters of water. By evening on July 14, the dam was flooded knee-deep over a width of 150 meters, according to the study authors. If the dam would have breached, this would have caused massive destruction of the communities downstream.&nbsp;



In an effort to understand what happened more clearly after the flood, the scientists created a 3D model. This model is useful in understanding how the landscape changed in response to the flood and will hopefully help people to more effectively prepare for extreme precipitation events in the future&nbsp;&nbsp;&nbsp;



---



By <a href="mailto:zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Flood disaster in Germany raises questions about extreme precipitation

On the 14th of July, an amount of rain that...

New research led by <a href="https://english.pku.edu.cn/">Peking University</a> has found that the highly unusual <a href="https://www.earth.com/news/arctic-warming-will-cause-extreme-cooling-elsewhere/">Arctic</a> ozone hole that developed in the spring of 2020 was likely caused by record-high sea surface temperatures (SST) in the North Pacific Ocean.&nbsp;



Unlike the <a href="https://www.earth.com/news/this-years-ozone-hole-is-larger-than-antarctica/">Antarctic ozone hole</a> which develops each year between September and November (the austral spring), ozone levels in the Arctic do not get sufficiently depleted to endanger the ozone layer. Since the Arctic stratospheric vortex is significantly warmer than its Antarctic counterpart, polar stratospheric clouds, which play a key role in ozone depletion processes, do not generally form.



However, polar meteorologists reported an unusually large Arctic ozone hole during spring 2020. Scientists from the <a href="https://www.atmos.pku.edu.cn/en/">Department of Atmospheric and Oceanic Sciences</a> at Peking University, led by Professor Yongyun Hu, have struggled to discover what caused this unusual event. Using a long-range climate model and performing multiple experiments and simulations, Dr. Hu and his colleagues managed to explain the strange phenomenon.&nbsp;



In a study recently published in the journal <a href="http://doi.org/10.1007/s00376-021-0359-9">Advances of Atmospheric Sciences</a>, they argued that a weakened “<a href="https://oceanservice.noaa.gov/facts/rossby-wave.html">wavenumber 1-wave</a>” (a type of oceanic and atmospheric wave occurring largely due to the Earth’s rotation) was responsible for the anomalously cold Arctic stratosphere vortex that depleted the ozone layer. In its turn, this weakening of planetary wave was apparently caused by the record-high sea surface temperature registered during late winter and early boreal spring.



“The record-high North Pacific sea surface temperatures during February and March 2020 led to a large reduction of wavenumber-1 wave activity by modifying the Aleutian low,” explained Professor Hu. “The reduction of planetary wave activity caused the extremely cold and persistent stratospheric polar vortex between February and April 2020 which provided the necessary conditions for severe ozone loss.”



According to Professor Hu, these results suggest that, as long as high enough sea surface temperatures will continue to occur, severe ozone loss is unavoidable. Only by urgently and significantly mitigating climate change we will be able to save our already precarious ozone layer.&nbsp;



---



By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Heat in the North Pacific linked to unusual Arctic ozone hole

New research led by Peking University has found that the...

A new study from the <a href="https://www.wisc.edu/">University of Wisconsin-Madison</a> reveals how aspen forests maintain the diversity they need to adapt to fluctuating environmental conditions. The experts found that aspen trees change their genetic structure over time as they balance the need to compete for sunlight and defend themselves from pests.&nbsp;



Since Aspen is the most broadly distributed tree species in North America, it serves as a "bellwether species," or a good indicator of how forests will adapt to anthropogenic climate change and other environmental challenges.



Trees are often faced with competition from other trees for sunlight, and they respond by making growth a priority. But with all of that energy committed to height growth, the trees become more vulnerable to pests.



The new research, which is funded by the <a href="https://www.nsf.gov/">National Science Foundation</a> (NSF), demonstrates that evolutionary forces can quickly shape entire forests. The study also shows that exposure to a range of environmental changes promotes the diversity that trees need to overcome various stressors.&nbsp;



"This long-term project provides new insights into the role of forest structure on genetic diversity in aspen groves, and how that affects leaf traits that influence the abundance and distribution of herbivores," said Colin Orians, a program director in NSF's Division of Environmental Biology. &nbsp;



According to a report from NSF, the findings are valuable for conservation biologists who want to protect diverse forest ecosystems from the threats of global warming, invasive species, and other environmental changes.



"What this work has done is show how key traits - like growth and defense - can be coupled together and how genetic diversity will allow populations to adapt to new stresses," said Rick Lindroth, an ecologist at University of Wisconsin–Madison.



The study is published in the journal <a href="https://www.pnas.org/">Proceedings of the National Academy of Sciences</a>.



---



By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Aspen trees change their genetic structure to adapt

A new study from the University of Wisconsin-Madison reveals how...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="QGPzYnXEtN-1712599-12187" type="single"]</div>



Today’s Video of the Day from <a href="https://www.igb.illinois.edu/">Carl R. Woese Institute for Genomic Biology</a> reveals how scientists can modify common crops like soybean, rice, and wheat to protect them from heat stress.



“We need to double crop production by 2050 to feed a growing global population, and not only are we not on track to do that, but climate change is further complicating things,” said Amanda Cavanagh, a lecturer at the University of Essex. 



The study is part of Realizing Increased Photosynthetic Efficiency (RIPE), an international research project that aims to develop food crops that turn the sun’s energy into food more efficiently.



“Using an engineering approach we designed multiple alternative metabolic pathways to photorespiration. Testing them in the field showed increases in productivity which led Amanda to significantly move the project forward by showing our engineered plants can withstand pretty extreme temperature stress,” said study co-author and RIPE researcher Paul South.&nbsp;



“As the climate changes and temperature stresses increase the pressure on our global food supply, farmers will need every tool available including engineering approaches like the synthetic biology used here to maintain safe and productive harvests.”



The experts tested plants modified to have more efficient photorespiration to see if they were better adapted to warmer temperatures.&nbsp;



The team found that the engineered plants produced 26 percent more biomass than the wild-type plants exposed to the same temperatures, and had 15 percent less yield loss under the higher temperatures.



Video Credit: Amanda Nguyen/University of Illinois



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Designing crops that can beat the heat

[sendtonews key="QGPzYnXEtN-1712599-12187" type="single"] Today’s Video of the Day from Carl...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="EjmSP20gQK-2593093-12187" type="single"]</div>



Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes the first comprehensive estimate of carbon density in the Saharan, Sahel, and Sudanian zones of Africa. In an effort to measure the amount of carbon stored across these drylands, a team of scientists used high-resolution satellite images and artificial intelligence to map nearly 10 billion individual trees. 



"The high spatial resolution (50 cm) combined with AI and field measurements used in this study is key to improving tree inventories in drylands," said Pierre Hiernaux, a French researcher working for NASA. "The ever-increasing availability of very high-resolution satellite imagery will make it possible to assess carbon pools and their dynamics at the individual tree level on a global scale."



"This study is exceptional because it is pioneering a type of approach that will revolutionize the monitoring of trees and forests on a global scale: in the short term, it will be possible to map the world's trees from the centre of the Amazon to our schoolyards," said <a href="https://www.inrae.fr/en">INRAE</a> researcher Jean-Pierre Wigneron.



"Many fields of application will become much more efficient and accurate, such as tracking carbon stocks, biodiversity, monitoring logging and protection against illegal forest degradation, in near real time.”



Video Credit: NASA Goddard&nbsp;



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Remote sensing will revolutionize the way we monitor trees

[sendtonews key="EjmSP20gQK-2593093-12187" type="single"] Today's Video of the Day from NASA...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="uV9Lh2fQbV-1760058-12187" type="single"]</div>



Lesotho: Africa's "Kingdom in the Sky" Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features northwest Lesotho in South Africa.



According to ESA, Lesotho is the only nation in the world that lies completely above 1,000 m in elevation. The country is famous for its tall mountains and narrow valleys, and is known as Africa's "Kingdom in the Sky."



Out of a population of around two million people, about 80 percent live in rural areas. More than 75 percent of these people are engaged in <a href="https://www.earth.com/news/climate-change-will-have-a-global-impact-on-agriculture/">agriculture</a>, including rainfed cereal production and animal grazing.&nbsp;



ESA reports that the country’s agricultural system faces a growing number of issues, with climate-related vulnerabilities such as drought, floods and extreme temperatures occurring more frequently. 



Diamonds are amongst the minerals found in the mountains. Indeed, Lesotho can truly be called the Kingdom in the Sky. Beautiful, culturally rich, safe, affordable, and easily accessible from Durban and Johannesburg, mountainous Lesotho is a vastly underrated travel destination. the Kingdom of Lesotho (Sotho: 'Muso oa Lesotho) is an enclaved country in southern Africa. It is just over 30,000 km2 (11,583 sq mi) in size and has a population of around 2 million.



Video Credit: ESA&nbsp;&nbsp;



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer 



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Lesotho: Africa's "Kingdom in the Sky"

[sendtonews key="uV9Lh2fQbV-1760058-12187" type="single"] Lesotho: Africa's "Kingdom in the Sky" Today’s...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="f8fukm28Vz-2491833-12187" type="single"]</div>



Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> features a visual dataset of.methane emissions from wetlands across the globe. Atmospheric methane levels have reached record highs in recent years, and wetlands are a major source of these emissions.&nbsp;



"Methane is an important greenhouse gas that contributes substantially to global warming. On a molecule by molecule basis, methane is much more efficient at trapping heat than carbon dioxide, the main driver of warming," says NASA.



"Though human activities, including agriculture, oil and natural gas production and use, and waste disposal, collectively contribute the majority of methane to the atmosphere, about a third of total methane emissions comes from wetlands."&nbsp;



According to NASA, understanding methane emissions from wetlands and other natural sources is critically important for scientists and policymakers who are working to combat climate change by reducing emissions from human activities.



Video Credit: NASA Goddard



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Wetlands are a major source of methane emissions

[sendtonews key="f8fukm28Vz-2491833-12187" type="single"] Today's Video of the Day from NASA...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="0879czfG3k-1785905-12187" type="single"]</div>



Today’s Video of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> reveals the evolution of the Columbia Glacier in southeastern Alaska. Columbia is among the fastest shrinking glaciers in the world, and the video documents its rapid retreat over the years.&nbsp;



Columbia Glacier is a large, multi-branched calving glacier that flows out of the Chugach Mountains to the Prince William Sound.&nbsp;



According to USGS, Columbia had a long history of stability prior to 1980, with a length 41 miles, and small, short-lived advances or retreats.



In the years since 1980, however, satellite images have captured Columbia’s alarming retreat. By using false-color images, scientists can distinguish between snow and ice, open water, vegetation, and rocky debris on the glacier’s surface.



The series of false-color images featured in today's video were acquired over the span of 35 years. You can see that by 2021, the glacier’s main branch had retreated about 15 miles from its initial position.



The Columbia Glacier has also lost more than 50 percent of its volume, mostly due to calving. <a href="https://www.earth.com/video/nasa-reveals-3d-visual-of-an-atmospheric-river/">NASA</a> reports that while climate change likely started the retreat, mechanical processes kept the disintegration going.



The NASA images are provided by Jesse Allen, Robert Simmon, Joshua Stevens, and Lauren Dauphin using data from Landsat satellites, from the U.S. Geological Survey, and data from MODIS on NASA’s Terra satellite. The structure of Columbia’s moraine played a large role in the stability of the glacier before 1980. 



Like other tidewater glaciers, the Columbia built up a moraine over time, and the mixture of ice and rock functioned like a dam keeping out the sea. It was supported on one end by the shoreline and by the underwater terminal moraine at the other.



Video Credit: NASA Earth Observatory/&nbsp; NASA’s Scientific Visualization Studio



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

The rapid retreat of the Columbia Glacier

[sendtonews key="0879czfG3k-1785905-12187" type="single"] Today’s Video of the Day from NASA...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="3UUsNkFOuS-2487333-12187" type="single"]</div>



Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes how record-breaking heat expressed itself around the world in 2022.



Scientists have determined that 2022 was the 5th warmest year since 1880. Furthermore, the last nine consecutive years have been the warmest on record.



From devastating floods and wildfires to natural disasters like Hurricane Ian, 2022 showed us yet again how a warming climate affects people across the globe.&nbsp;



"As we look back at 20:22 and years past, we see that each year we better understand the challenges we face and how important it is to meet them," says NASA.



Video/ Image Credit: NASA Goddard



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

2022 illustrated the consequences of a warming climate

[sendtonews key="3UUsNkFOuS-2487333-12187" type="single"] Today's Video of the Day from NASA...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="JbW4VsY53O-1632195-12187" type="single"]</div>



Satellites reveal how Earth's systems are interconnected Today’s Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes Earth’s interconnected systems, and how this network is affected by rising temperatures.&nbsp;



During 2020, average global temperatures matched the hottest year on record. The hurricane season was also record-breaking, with many of the storms intensifying at extraordinary speeds. Hot water in the ocean is fuel for hurricanes. The satellite data shows that it's all one interconnected system showing how Satellites reveal how Earth's systems are interconnected.



According to NASA, dust swept up from Northern Africa plays a major role in the formation of hurricanes, and is also a key source of fertilization in the Amazon rainforest. As a result of<a href="https://www.earth.com/news/seagrass-wasting-disease-is-fueled-by-climate-change/"> climate</a> change, dust plumes are expected to decline, which will have an effect on vegetation far away.&nbsp;



Images from Earth-observing satellites show how the world’s plant life is affected by natural disasters, fires, and deforestation. Satellites also reveal how widespread changes in vegetation impact waterways,&nbsp; the climate, air quality. Satellites communicate by using radio waves to send signals to the antennas on the Earth. "Earth From Space" is a groundbreaking two-hour special that reveals a spectacular new space-based vision of our planet. 



Video Credit: NASA Goddard&nbsp;



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Satellites reveal how Earth's systems are interconnected

[sendtonews key="JbW4VsY53O-1632195-12187" type="single"] Satellites reveal how Earth's systems are interconnected...

Today’s Video of the Day from the <a href="https://welcome.miami.edu/">University of Miami</a> Rosenstiel School of Marine and Atmospheric Science explores how changes in water temperatures have affected tiger shark habitats and movements in the North Atlantic Ocean. The study reveals that rising temperatures have caused the sharks to shift toward the poles over the past 40 years.



“Tiger shark annual migrations have expanded poleward, paralleling rising water temperatures,” explained study lead author Neil Hammerschlag. “These results have consequences for tiger shark conservation, since shifts in their movements outside of marine protected areas may leave them more vulnerable to commercial fishing.”



The researchers analyzed nine years of tracking data from satellite-tagged tiger sharks, combined with four decades of conventional tag and recapture data provided by National Oceanic and Atmospheric Administration (NOAA) Cooperative Shark Tagging Program.



The experts found that during the last decade of record heat, for every one-degree Celsius increase in water temperatures, tiger sharks migrated further poleward by over 400 kilometers. They also migrated two weeks earlier than usual to waters off the northeastern coast of the United States.



“Given their role as apex predators, these changes to tiger shark movements may alter predator-prey interactions, leading to ecological imbalances, and more frequent encounters with humans,” concluded Professor Hammerschlag.



Video Credit: University of Miami Rosenstiel School of Marine and Atmospheric Science



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Tiger sharks are shifting poleward as temperatures rise

Today’s Video of the Day from the University of Miami...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="qARzJPSabQ-2270617-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> is focused on the melt ponds that emerge during the spring and summer on the Greenland Ice Sheet, which is the largest ice mass in the northern hemisphere.



"Melt ponds are vast pools of open water that form on both sea ice and ice sheets and are visible as turquoise-blue pools of water in this Copernicus Sentinel-2 image," says ESA.



"When snow and ice melts atop glaciers, water flows in channels and streams and collects in depressions on the surface. These melt ponds can speed up the melting of the surrounding ice since they greatly reduce the ice’s ability to reflect sunlight."



"This can create a positive feedback where an increasing number of melt ponds absorb more heat which causes ice cover to melt even faster."



According to ESA, Greenland has been hit with a late-season heatwave that began in early September. This caused the type of melt event that usually occurs in the middle of summer.



"In a recent paper published in Nature Climate Change, scientists found that major sea-level rise from the melting of the Greenland ice cap is now ‘inevitable’ even if the burning of fossil fuels were to halt overnight," says ESA. "Using satellite observations of Greenland ice loss and ice cap from 2000 to 2019, the team found the losses will lead to a minimum rise of 27 cm regardless of climate change."



Video Credit: ESA&nbsp;



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Melt ponds on the Greenland Ice Sheet

[sendtonews key="qARzJPSabQ-2270617-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="fxH3eJHEkQ-2010196-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes how Earth is unique in our solar system for its ability to sustain liquid water on its surface. But now, the water cycle is shifting as the climate warms, and scientists must find ways to predict how these changes will affect water availability.



Overall, 96 percent of Earth's water is saltwater, and nearly all of freshwater is found in ice and groundwater. These sources of water are linked as it passes through solid, liquid and gas phases.



In a warmer climate, the water cycle will be transformed. It will be easier for water to evaporate and form clouds, and storms will become more frequent and intense. Some regions will get too much water, while others will be left without enough water. In addition, soil moisture will be lost - which threatens food security.



Scientists are using satellite data from over the last 40 years to track changes that are happening in the water cycle. This will ultimately help us prepare for extreme events and better manage our water resources, according to ESA.



Video Credit: ESA



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Tracking changes in Earth's water cycle

[sendtonews key="fxH3eJHEkQ-2010196-12187" type="single"] Today’s Video of the Day from the...

Saturn,-,High,Resolution,3d,Images,Presents,Planets,Of,The

<div class="wp-block-sendtonews-playerselector">[sendtonews key="Ccjk8KEMzv-2550719-12187" type="single"]</div>



Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard Space Flight Center</a> features images of Saturn from NASA’s Hubble Space Telescope. The photographs capture the start of the mysterious "spoke season" on Saturn - when unexplained features appear on its rings. 



According to NASA, both the cause of the spokes and their seasonal variability have yet to be fully explained by planetary scientists.



"Like Earth, Saturn is tilted on its axis and therefore has four seasons, though because of Saturn's much larger orbit, each season lasts approximately seven Earth years. Equinox occurs when the rings are tilted edge-on to the Sun," explains NASA.



"The spokes disappear when it is near summer or winter solstice on Saturn. (When the Sun appears to reach either its highest or lowest latitude in the northern or southern hemisphere of a planet.) As the autumnal equinox of Saturn's northern hemisphere on May 6, 2025, draws near, the spokes are expected to become increasingly prominent and observable."



Experts believe that the spokes may be a product of the planet's variable magnetic field. When magnetic fields interact with solar wind, an electrically charged environment is created. This phenomenon is visible on Earth as the northern lights.&nbsp;



"Scientists think that the smallest, dust-sized icy ring particles can become charged as well, which temporarily levitates those particles above the rest of the larger icy particles and boulders in the rings," says NASA.



The spokes were first observed in the early 1980s by NASA's Voyager mission. Depending on the angle of the rings, the spokes can appear dark or light.



"Thanks to Hubble's OPAL program, which is building an archive of data on the outer solar system planets, we will have longer dedicated time to study Saturn’s spokes this season than ever before," said NASA senior planetary scientist Amy Simon, head of the Hubble Outer Planet Atmospheres Legacy (OPAL) program.



"Despite years of excellent observations by the Cassini mission, the precise beginning and duration of the spoke season is still unpredictable, rather like predicting the first storm during hurricane season."



Video Credit: NASA Goddard&nbsp;



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Mysterious "spoke season" captured on Saturn

[sendtonews key="Ccjk8KEMzv-2550719-12187" type="single"] Today's Video of the Day from NASA...

Closeup,Of,Fresh,Green,The,Napier,Bush,Grass,As,Animal

<div class="wp-block-sendtonews-playerselector">[sendtonews key="6SdlLLbt0t-1988946-12187" type="single"]</div>



Today’s Video of the Day from <a href="http://www.ntu.edu.sg/">NTU Singapore</a> reveals that some plants can remove toxic heavy metals from soil.&nbsp;



The researchers analyzed samples of various tropical plant species to test for levels of heavy metals and metalloids. The study showed that there are existing plants with high levels of these contaminants, which means that these species are great candidates for drawing pollutants out of the soil.&nbsp;



Among the plants examined in the study, 12 species had accumulated several types of heavy metals and metalloids. These plants are widely available, including species that are native to Singapore.



“In a small nation like Singapore, land may be repurposed to support new development plans, so it is important that we have a green and sustainable way to remediate land that is contaminated," said Professor Lam Yeng Ming.



"We set out to uncover how to better make use of tropical plants to do phytoremediation and through advanced characterization techniques, we showed how some of these tropical plant species can be an environmentally friendly and literally a 'green' way to remove contaminants in soil."&nbsp;



"Phytoremediation also has benefits of cost effectiveness, simplicity of management, aesthetic advantages, and long-term applicability and sustainability. The strategy prevents erosion and metal leaching by stabilizing or accumulating heavy metals, so that helps reduce the risk of contaminant spread.”



Video Credit: NTU Singapore



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Plants help remove heavy metals from contaminated soil

[sendtonews key="6SdlLLbt0t-1988946-12187" type="single"] Today’s Video of the Day from NTU...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="gRpsplpwpe-2251464-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> describes why herbicides are not as effective in killing weeds anymore. In the 20th century, chemical companies developed thousands of herbicides. The most commonly used herbicide was glyphosate, which was introduced in 1974.



Over the past few decades, dozens of species of weeds have evolved resistance to glyphosate. Depending on the site of action, the part of the plant that an herbicide interacts with, weeds may even be resistant to herbicides that have not been developed yet.&nbsp;



With increasing resistance to glyphosate and other herbicides, weeds are - once again - becoming a major concern for farmers.&nbsp;



Video Credit: American Chemical Society&nbsp;



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Weeds are becoming increasingly resistant to herbicides

[sendtonews key="gRpsplpwpe-2251464-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="eAVLRk51oJ-1826888-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.jpl.nasa.gov/">NASA Jet Propulsion Laboratory</a> (JPL) describes a dust storm on Mars that was nearly twice the size of the United States. As the storm covered the southern hemisphere of the planet, some of NASA’s explorers had to delay their normal activities.



NASA’s Insight lander put itself in a "safe mode" for 11 days to conserve battery power because solar power was disrupted by the dust. The Ingenuity Mars Helicopter postponed flights until conditions improved.



"A fleet of NASA orbiters monitor Martian dust storms like this one and serve as lifelines to Earth by relaying data from the rovers and lander on the ground back to the team. This includes the Mars Reconnaissance Orbiter, MAVEN, and Odyssey," reports JPL.



"Dust storms like this recent one start close to the ground and are spread by wind as they rise – warming the cold Martian atmosphere."



The images in the video were captured by NASA’s Curiosity as the dust rolled in. A fleet of orbiters monitored the dust storm from above, relaying data from Mars’ explorers back to scientists on Earth.



Video &amp; Image Credit: NASA/JPL-Caltech/ASU/MSSS



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

NASA monitors giant dust storms on Mars

[sendtonews key="eAVLRk51oJ-1826888-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="sFFhiK9OOn-1720418-12187" type="single"]</div>



Today's Video of the Day from the <a href="http://www.esa.int/">European Space Agency</a> features Qeshm Island in the Strait of Hormuz. This strait provides the only sea passage from the Persian Gulf to the open ocean.



Qeshm is separated from the Iranian coast by the Clarence Strait, also known as Khuran.&nbsp;The Hara Forest Protected Area is a network of shallow waterways and forest located between the island and the mainland. This protected region is home to sea turtles, snakes, and more than 150 species of migrating birds.



Qeshm is famous for its wide range of&nbsp;ecotourist&nbsp;attractions, such as the&nbsp;Hara marine forests. According to environmentalists, about 1.5 percent of the world birds and 25 percent of Iran's native <a href="https://www.earth.com/news/female-hummingbirds-avoid-sexual-harassment-by-looking-like-males/">birds</a> annually migrate to the forests, which are the first national geo park in Iran.



Tourists are also drawn to the island to see an age-old Portuguese&nbsp;fort, historic mosques, the&nbsp;Seyyed Mozaffar&nbsp;and&nbsp;Bibi Maryam&nbsp;shrines, and the "Valley of Stars."



The average temperature on the island is 81 degress and the region is often hot and humid. From June to August, the island is described as being oppressively hot. The ideal time to visit is during the winter season. 



Video Credit: ESA&nbsp;



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Qeshm Island in the Strait of Hormuz

[sendtonews key="sFFhiK9OOn-1720418-12187" type="single"] Today's Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="yPSXGZek1I-2312529-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Inhambane Bay in southeast Mozambique.&nbsp;



"Inhambane Bay is a deep inlet into which the small Mutamba River flows," says ESA. "On one side of the bay lies the historical city of Inhambane, capital of the Inhambane Province, while the sister city of Maxixe, the economic capital of Inhambane, sits across from it. The province is the second largest grower of cashews, after Nampula, and it also produces coconut and citrus fruits."



The beaches of Barra and Tofo are popular with tourists. There are also coral reefs along the long coastline of Inhambane, making it an ideal destination for scuba diving and snorkeling.



"Mozambique’s extensive coastline heightens the country’s vulnerability to tropical cyclones that develop in the Indian Ocean as well as storm surge flooding," says ESA.



"More than half of the population lives in low lying coastal areas, putting communities at risk. Inhambane Bay was dangerously close to where Cyclone Idai made landfall in 2019 causing widespread destruction to the country."



Video/ Image Credit: ESA



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Inhambane Bay in southeast Mozambique

[sendtonews key="yPSXGZek1I-2312529-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="EPdZexVR30-1731237-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency </a>&nbsp;features the Kangerlussuaq Glacier, one of the largest tidewater outlet glaciers in Greenland. The glacier is located on the east coast of the Greenland ice sheet.



As human-induced climate change continues to drive up temperatures, global ice loss is accelerating at an alarming rate. ESA reports that, over the past decade alone, 3.5 trillion tons of ice have melted from the Greenland ice sheet. This is enough to cover the UK with meltwater 15 meters deep.



Based on satellite imagery, researchers determined that Kangerlussuaq entered a new phase of rapid retreat and acceleration in 2017. In their study, published in <a href="https://www.frontiersin.org/articles/10.3389/feart.2019.00123/full">Frontiers in Earth Science</a>,&nbsp; the experts report that the glacier's ice front is now at its most retreated position since the early 20th century.



"Given Kangerlussuaq’s previous impacts on both the magnitude and pattern of ice sheet wide mass loss, we predict that its new phase of retreat, acceleration and thinning will markedly enhance the south-east region’s contribution to increasing discharge from the ice sheet," wrote the study authors.&nbsp;&nbsp;



"More broadly, accurate forecasting of the ice sheet’s contribution to sea level rise will require a deeper understanding of, and responses to, these non-linear ice dynamic processes."



Video Credit: ESA



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Kangerlussuaq Glacier on the Greenland ice sheet

[sendtonews key="EPdZexVR30-1731237-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="uwirCufwYv-2012371-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes the complex relationship between ocean and climate. ESA's Climate Change Initiative will help us understand how oceans influence the climate and how climate change is impacting the oceans.&nbsp;



"Earth’s oceans are huge heat stores, soaking up 93% of the excess heat from human activity over the past 70 years. Ocean currents redistribute heat around the planet, from the Equator to the poles. Where this ocean heat goes influences weather patterns and regional climate," explains ESA.



"As well as absorbing heat, oceans are a natural carbon sink, absorbing a quarter of carbon dioxide emissions from human activity. This has led to the acidification of ocean water, threating marine life."



The amount of heat and carbon dioxide soaked up by the ocean depends on specific variables, including phytoplankton, temperatures, waves, salinity, and ice cover. Satellites can be used to measure these variables from space.



"From their unique vantage point, satellites provide key information for understanding the complexities of our planet and monitoring environmental issues," says ESA.



Video Credit: ESA



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Ocean heat influences regional climate

[sendtonews key="uwirCufwYv-2012371-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="JrMLDXHmjl-1911953-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes the importance of monitoring the shape of the sea surface, which is constantly changing. These observations have many applications, such as ship routing, <a href="https://www.earth.com/news/the-modem-ocean-is-a-tough-place-for-whales-to-survive/">ocean</a> current forecasting, and debris tracking.



"A project supported by the Discovery element of ESA’s Basic Activities recently investigated a new technique to measure sea surface topography very precisely," reports ESA.



"The technique involves looking at satellite navigation (GNSS) signals that have been reflected off of the sea surface at very low angles. At these so-called grazing angles, waves and surface roughness have very little impact on the reflection process; the sea surface acts as a very smooth mirror."



Estel Cardellach is the principal investigator at the Institute for Space Studies of Catalonia, who first submitted the idea for the project.



“In a mirror-like reflection the phase of the signal can be tracked – it is continuous," said Cardellach. "Different surface heights result in different phase measurements. It gives a very precise measurement of the surface altitude at a few centimetres’ precision.”



The researchers developed a GNSS receiver and set up an experiment in the Balaeric Islands to collect signals from the receiver that were reflected off the sea surface. Ultimately, these signals will provide improved measurements of the shape of the sea surface.



Image/ Video Credit: ESA



---



By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Monitoring the dynamic shape of the sea surface

[sendtonews key="JrMLDXHmjl-1911953-12187" type="single"] Today’s Video of the Day from the...

Aerial,Photo,Of,River,In,Amazon,Rainforest,Jungle,In,Peru

<div class="wp-block-sendtonews-playerselector">[sendtonews key="u0TYxxqfF7-2186404-12187" type="single"]</div>



Today’s Video of the Day from <a href="https://www.nasa.gov/goddard">NASA’s Goddard Space Flight Center</a> describes how scientists are using autonomous sound sensors to monitor deforestation in the Amazon. By recording soundscapes, the experts can determine which animals are present through their distinct sounds.&nbsp;



Using this method, sounds can be used as scientific measurements to analyze the effects of deforestation. The researchers will gain a better understanding of how the acoustics of a forest can be used to measure its health.&nbsp;



"From space, parts of the Amazon rainforest that have previously been logged or burned may look lush and green, like a place buzzing with activity and full of sounds. But inside the rainforest, the animal life may tell a different story, of a harsh environment and a quieter soundscape," says NASA.



Video Credit: NASA’s Goddard Space Flight Center&nbsp;



---



By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Monitoring deforestation in the Amazon through sounds

[sendtonews key="u0TYxxqfF7-2186404-12187" type="single"] Today’s Video of the Day from NASA’s...