Mon Feb 16, F. Flechtner
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Koulali, Achraf, King, Matt A., Clarke, Peter J., Nield, Grace A., and Bentley, Michael J., 2025. Geodetic Observations Reveal Near–Zero Uplift Rates in the Transantarctic Mountains: Implications of Surface Mass Loading Deformation. Geophysical Research Letters, 52(23):e2025GL119082, doi:10.1029/2025GL119082.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2025GeoRL..5219082K,
author = {{Koulali}, Achraf and {King}, Matt A. and {Clarke}, Peter J. and {Nield}, Grace A. and {Bentley}, Michael J.},
title = "{Geodetic Observations Reveal Near-Zero Uplift Rates in the Transantarctic Mountains: Implications of Surface Mass Loading Deformation}",
journal = {\grl},
year = 2025,
month = dec,
volume = {52},
number = {23},
eid = {e2025GL119082},
pages = {e2025GL119082},
abstract = "{The exposed bedrock of the Transantarctic Mountains (TAM) provides rare
opportunity to constrain present-day Glacial Isostatic
Adjustment (GIA) in East Antarctica, with impacts on Gravity
Recovery and Climate Experiment (GRACE) and other estimates of
ice-mass change. In this study, we use Global Positioning System
(GPS) displacement time series to provide new observations of
uplift in the TAM region. We demonstrate that the deformation
signal due to Surface Mass Balance (SMB) loading manifests as a
multi-year apparent change in the vertical linear
trends{\textemdash}that is, a change in velocity. After
correcting for SMB-induced elastic deformation, we find that
most GPS sites in the TAM region exhibit velocities approaching
zero, with a median rate of 0.67 mm/yr. This is lower than
forward GIA models predict, suggesting revisions to regional ice
history and/or Earth models are required and current GIA models
bias estimates of present-day ice sheet mass change.}",
doi = {10.1029/2025GL119082},
adsurl = {https://ui.adsabs.harvard.edu/abs/2025GeoRL..5219082K},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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Mon Feb 16, F. Flechtner