The findings come from the Ice, Cloud and land Elevation Satellite 2 (ICESat-2), which was launched into orbit in fall 2018 and began taking detailed global elevation measurements, including over Earth’s frozen regions. Susheel Adusumilli/Scripps Institution of Oceanography This shows a rift, or crack, on the surface of Ross Ice Shelf in Antarctica using data collected by ICESat-2 between Sept. These ice shelves help hold back the flow of land-based ice. In Antarctica, sea level rise is being driven by the loss of the floating ice shelves melting in a warming ocean. In a new study published April 30 in the journal Science, researchers found the net loss of ice from Antarctica, along with Greenland’s shrinking ice sheet, has been responsible for 0.55 inches (14 millimeters) of sea level rise to the global ocean since 2003. Using the most advanced Earth-observing laser instrument NASA has ever flown in space, a team of scientists led by the University of Washington has made precise measurements of how the Greenland and Antarctic ice sheets have changed over 16 years. The circle in the middle is over the South Pole where the instrument does not collect data. The two ice shelves have lost 5 meters (16 feet) and 3 meters (10 feet) of ice per year, respectively, between 20.
Thwaites and Crosson ice shelves (seen just below the peninsula) have thinned the most. The ice lost near the coasts, especially West Antarctica and the Antarctic Peninsula, vastly outweigh gains in the interior. Dark reds and purples show large average rates of ice loss near the Antarctic coast, while blues show smaller rates of ice gain in the interior. This shows the amount of ice gained or lost by Antarctica between 20.
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