Increased crevassing across accelerating Greenland Ice Sheet margins.

ABSTRACT: Surface crevassing on the Greenland Ice Sheet is a large source of uncertainty in processes controlling mass loss due to a lack of comprehensive observations of their location and evolution through time. Here we use high-resolution digital elevation models to map the three-dimensional volume of crevasse fields across the Greenland Ice Sheet in 2016 and 2021. We show that, between the two years, large and significant increases in crevasse volume occurred at marine-terminating sectors with accelerating flow (up to +25.3 ± 10.1% in the southeast sector), while the change in total ice-sheet-wide crevasse volume was within measurement error (+4.3 ± 5.9%). The sectoral increases were offset by a reduction in crevasse volume in the central west sector (-14.2 ± 3.2%), particularly at Sermeq Kujall

SUBMITTER: Chudley TR 

PROVIDER: S-EPMC11810776 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature