Mon Oct 13, F. Flechtner
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Wu, Haotian, Ran, Jiangjun, Ali, Shoaib, Tangdamrongsub, Natthachet, and Fettweis, Xavier, 2025. A Novel Approach Combining GRACE(-FO) and Altimetry Reveals a Recent East-to-West Shift in the Slowdown of Glacier-Scale Mass Loss in the Greenland Ice Sheet. Journal of Geophysical Research (Solid Earth), 130(5):e2024JB030862, doi:10.1029/2024JB030862.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2025JGRB..13030862W,
author = {{Wu}, Haotian and {Ran}, Jiangjun and {Ali}, Shoaib and {Tangdamrongsub}, Natthachet and {Fettweis}, Xavier},
title = "{A Novel Approach Combining GRACE(-FO) and Altimetry Reveals a Recent East-to-West Shift in the Slowdown of Glacier-Scale Mass Loss in the Greenland Ice Sheet}",
journal = {Journal of Geophysical Research (Solid Earth)},
keywords = {time variable gravity, mass change, Greenland, ice sheet, glacier, climatic variation},
year = 2025,
month = may,
volume = {130},
number = {5},
eid = {e2024JB030862},
pages = {e2024JB030862},
abstract = "{The mass loss of the Greenland Ice Sheet (GrIS) has profound impacts on
sea levels, the water cycle, and global climate variability. The
Gravity Recovery and Climate Experiment (GRACE) and its follow-
on mission (GRACE-FO) provide accurate but limited spatial
resolution observations of GrIS mass changes. Therefore, we
developed a novel multi-time scale weighted forward modeling
(WFM) approach that combines GRACE(-FO) observations with
satellite altimetry data to improve mass change estimations in
the GrIS at high-resolution (25 km {\texttimes} 25 km). The WFM
solution effectively represents the glacier-scale interannual
mass variations, with an average correlation of 0.71 with the
Input-Output method, higher than Mascon products. The WFM
solution reveals a spatial pattern of glacier mass change from
2020 to 2023, indicating that the slowdown in the GrIS glacier
mass loss has shifted from the east to the west compared to
2013{\textendash}2018; the mass loss rate decreased by 44.9
{\ensuremath{\pm}} 1.04 Gt/yr in the western GrIS and increased
by 42.3 {\ensuremath{\pm}} 0.98 Gt/yr in the eastern GrIS. The
most pronounced mass loss slowdown occurred at Jakobshavn
Glacier (7.3 {\ensuremath{\pm}} 0.07 Gt/yr). In this pattern,
the trough of low-pressure west of the GrIS moved westward, and
a high-pressure anomaly over the North Atlantic south of the
GrIS intensified southwesterly winds over the GrIS. These winds
transported warmer, moister air from the Atlantic toward the
western GrIS, leading to increased snowfall and rainfall,
thereby promoting glacier mass accumulation. If this pattern
continues, it could benefit the preservation of the ice in the
western GrIS.}",
doi = {10.1029/2024JB030862},
adsurl = {https://ui.adsabs.harvard.edu/abs/2025JGRB..13030862W},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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Mon Oct 13, F. Flechtner