Last update: November 27th, 2020 at 2:17 pm
NASA’s Operation IceBridge captured this fantastic image of the Getz Ice Shelf.
IceBridge, is now eight years old, continues to record how ice is responding to environment changes. The Getz Ice Shelf in West Antarctica is one examined each year. “Getz is an ice shelf that has been experiencing some of the highest basal melt rates of the Antarctic ice shelves,” said Nathan Kurtz, IceBridge project scientist and a sea ice researcher at NASA’s Goddard Space Flight Center.
The images show two views of Getz as photographed on November 5 from a research airplane. The main image shows ice in the process of calving from the front of the shelf, soon to become an iceberg. The second image shows an area farther upstream, near the grounding line—the boundary where the ice sheet loses contact with bedrock and begins to float on the ocean. Here, a web of deep cracks, or crevasses, spans the icescape.
Flight paths are normally exact repeats of those flown previously; this helps scientists understand how the the ice surface changes over time. This year, new flights were added to the observations. Scientists mapped the bathymetry (shape and depth of the seafloor) below the ice shelf, and they mapped the ice surface and bedrock upstream of the grounding line.
The flight over Getz is just one of some key areas flown during the IceBridge campaign. Each flight plan is prioritized in order of importance: baseline (the highest priority), high, medium, and small. The flight on November 5 over Getz, for example, was categorized as “high” priority. Since the start of 2016 science flights on October 14, the team has flown six out of eight baseline missions, eight out of 15 high priority lines, and one medium and low priority mission each. Research flights for the season continue through November 18.
“We are in pretty good shape so far, having flown so many missions due to a combination of favorable weather, no major airplane issues, and all instruments operating well,” Kurtz said. “We’re about four weeks into the campaign, and it’s possible we could tie the record of most flights flown with Operation IceBridge if things continue to go well.”