Glaciers melting faster in ocean than anticipated, finds study

Study finds that in the first two decades of the century, the ice thinned by roughly 460 feet with average annual melt rate ring by 10feet per year in the 1990s to 30 feet per year in the 2020s.This image of the Petermann Glacier in northwest Greenland was captured by the Copernicus Sentinel-2 mission on 16 September 2022.Scientists are intrigued by the rapid melting of northwest Greenland’s Petermann Glacier in the last decade and a half.

In addition to satellite data, the Massachusetts Institute of Technology devised a general calculation model to assess climate change’s impact in a complex environment with ice, seawater, and land. Lead author Ratnakar Gadi, UCI Ph.D. candidate in Earth system science, explained: “By factoring this migration into the MIT numerical ocean model, we could estimate roughly 460 feet of thinning of the ice between 2000 and 2020. On average, the melt rate has increased from about 10 feet per year in the 1990s to 30 feet per year in the 2020s.

As it turns out, this grounding zone significantly contributes to the accelerated ice melting. The scientists saw a thinning of nearly 12 feet when evaluating via the numerical model observing just warmer ocean temperature.

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