Mon Feb 16, F. Flechtner
• Sorted by Date • Sorted by Last Name of First Author •
Jia, Qiuyang, Li, Zhen, Chao, Benjamin F., Wang, Hansheng, Gao, ChunChun, Zhang, Zizhan, and Jiang, Liming, 2025. Rapid response of the Greenland ice sheet to climate extremes revealed by GPS bedrock shift: the mid–August 2021 extreme melting. Earth, Planets and Space, 78(1):6, doi:10.1186/s40623-025-02334-2.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2025EPS...78....6J,
author = {{Jia}, Qiuyang and {Li}, Zhen and {Chao}, Benjamin F. and {Wang}, Hansheng and {Gao}, ChunChun and {Zhang}, Zizhan and {Jiang}, Liming},
title = "{Rapid response of the Greenland ice sheet to climate extremes revealed by GPS bedrock shift: the mid-August 2021 extreme melting}",
journal = {Earth, Planets and Space},
keywords = {The Greenland ice sheet, GPS, GRACE, Mass balance, Climate extremes, Earth Sciences, Atmospheric Sciences, Geology, Physical Geography and Environmental Geoscience, Engineering, Geomatic Engineering},
year = 2025,
month = dec,
volume = {78},
number = {1},
eid = {6},
pages = {6},
abstract = "{In mid-August 2021, an atmospheric river (AR) triggered unprecedented
rainfall over Greenland, inducing widespread extreme melting
across the ice sheet. Here, we use daily Global Positioning
System (GPS) observations to quantify the response of the
Greenland Ice Sheet to this extreme event, focusing on the
Central-West/South-West (CW-SW) and South-East (SE) basins. By
employing Empirical Orthogonal Function (EOF), we isolate
melting signals from GPS vertical displacement. GPS shows that
the AR-induced large-scale ice sheet ablation began on August 14
and lasted about one week, which is consistent with Automated
Weather Station (AWS) records and satellite microwave derived
ablation maps. By linking GRACE (Gravity Recovery and Climate
Experiment) mass changes to GPS displacements with
mass─displacement conversion factors, we quantify the impact of
the extreme melting event on ice sheet mass balance. The CW-SW
basin experienced more intensive ablation, with an average mass
loss of 27.2 {\ensuremath{\pm}} 6.9 Gt, compared to 15.3
{\ensuremath{\pm}} 5.6 Gt in the SE basin. Our study
demonstrates the advantages of GPS in capturing rapid changes in
the ice sheet, providing critical insights into the effects of
climate extremes on ice sheet dynamics.}",
doi = {10.1186/s40623-025-02334-2},
adsurl = {https://ui.adsabs.harvard.edu/abs/2025EP&S...78....6J},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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Mon Feb 16, F. Flechtner