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Speedup of Pine Island Glacier over the past several decades has made it Antarctica’s largest contributor to sea-level rise. The past speedup is largely due to grounding-line retreat in response to ocean-induced thinning that reduced ice-shelf buttressing. While speeds remained fairly steady from 2009 to late 2017, our Copernicus Sentinel 1A/B–derived velocity data show a >12% speedup over the past 3 years, coincident with a 19-km retreat of the ice shelf. We use an ice-flow model to simulate this loss, finding that accelerated calving can explain the recent speedup, independent of the ...

A Massive Study of Nearly Every Glacier on Earth Just Revealed a Devastating Trend NICOLETTA LANESE, LIVE SCIENCE 29 APRIL 2021 Earth's glaciers are shrinking, and in the past 20 years, the rate of shrinkage has steadily sped up, according to a new study of nearly every glacier on the planet. Glaciers mostly lose mass through ice melt, but they also shrink due to other processes, such as sublimation, where water evaporates directly from the ice, and calving, where large chunks of ice break off the edge of a glacier, according to the National Oceanic and Atmospheric Administration (NOAA...

In Brief: Due to ice's important role in the Earth system, NASA is committed to studying it extensively. Everything on our planet — the land, the water, the air, people — is connected by the various chemical, physical and biological processes that make up what we call the Earth system. One of the key components of that huge system is the cryosphere, or all of Earth’s frozen water. This important “sphere” includes frozen soils in Alaska, the snow on top of the Himalayas, as well as all the ice in the polar regions. Nowhere is the role of the cryosphere as evident as it is at high lat...

April 20, 2021 By Elise Gout In honor of Earth Day on April 22, the Earth Institute has a variety of great stories and events lined up for you throughout the entire month of April. Learn more. Whale Bay, Antarctica No. 4, 2016. Zaria Forman uses soft pastels to recreate undeveloped landscapes that are increasingly at risk to climate change. “I was looking for something more meaningful to imbue in my work, something that was more than just a pretty picture for somebody’s wall,” she said. Image courtesy of Zaria Forman It was on a trip to Greenland that artist Zaria Forman first gra...

 E-Mail IMAGE: GIF showing the potential distances over which thinning can spread into Greenland's interior. Glaciers in regions of higher elevation, tend to pervade less inland than those in regions of lower... view more  Credit: Credits: Denis Felikson As glaciers flow outward from the Greenland Ice Sheet, what lies beneath them offers clues to their role in future ice thinning and sea-level rise contribution. Outlet glaciers are rivers of ice flowing within the cracks of the bedrock and draining into the surrounding sea. They retreat and start to thin as climate warms, and this...