Spring made an early appearance this year • Earth.com

Spring made an early appearance this year


Spring made an early appearance this year Today’s Video of the Day from the USGS describes how satellites can detect vivid changes across landscapes when spring arrives.

Across many regions of the United States, spring emerged three to four weeks earlier this year. Some areas in the southeast have seen their earliest blooms in 39 years.

The beginning of spring is not always determined by fixed calendar dates. The phenological or ecological definition of spring relates to biological indicators, such as the blossoming of a range of plant species, the activities of animals, and the special smell of soil that has reached the temperature for micro flora to flourish. These indicators, along with the beginning of spring, vary according to the local climate and according to the specific weather of a particular year.

Some ecologists divide the year into six seasons. In addition to spring, ecological reckoning identifies an earlier separate prevernal (early or pre-spring) season between the hibernal (winter) and vernal (spring) seasons. Spring made an early appearance this year as shown above in video showing this time when only the hardiest flowers like the crocus are in bloom, sometimes while there is still some snowcover on the ground. The three warmest months are by definition summer, the three coldest months are winter, and the intervening gaps are spring and autumn. Meteorological spring can therefore, start on different dates in different regions.

By Chrissy Sexton, Earth.com Staff Writer

Video Credit: USGS

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