Mt. Everest’s highest glacier is a sentinel for accelerating ice loss

Abstract Mountain glacier systems are decreasing in volume worldwide yet relatively little is known about their upper reaches (>5000 m). Here we show, based on the world’s highest ice core and highest automatic weather stations, the significant and increasing role that melting and sublimation hav...

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Bibliographic Details
Published in:npj Climate and Atmospheric Science
Main Authors: Mariusz Potocki, Paul Andrew Mayewski, Tom Matthews, L. Baker Perry, Margit Schwikowski, Alexander M. Tait, Elena Korotkikh, Heather Clifford, Shichang Kang, Tenzing Chogyal Sherpa, Praveen Kumar Singh, Inka Koch, Sean Birkel
Format: Article in Journal/Newspaper
Language:English
Published: Nature Portfolio 2022
Subjects:
Environmental sciences
GE1-350
Meteorology. Climatology
QC851-999
ice core
Online Access:https://doi.org/10.1038/s41612-022-00230-0
https://doaj.org/article/62d36fe951444078b19cc05cee4fa91a
Description
Summary:Abstract Mountain glacier systems are decreasing in volume worldwide yet relatively little is known about their upper reaches (>5000 m). Here we show, based on the world’s highest ice core and highest automatic weather stations, the significant and increasing role that melting and sublimation have on the mass loss of even Mt. Everest’s highest glacier (South Col Glacier, 8020 m). Estimated contemporary thinning rates approaching ~2 m a−1 water equivalent (w.e.) indicate several decades of accumulation may be lost on an annual basis now that glacier ice has been exposed. These results identify extreme sensitivity to glacier surface type for high altitude Himalayan ice masses and forewarn of rapidly emerging impacts as Mt. Everest’s highest glacier appears destined for rapid retreat.

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