Mon Dec 15, F. Flechtner
• Sorted by Date • Sorted by Last Name of First Author •
Puggaard, Anna, Hansen, Nicolaj, Schlager, Elke, Sørensen, Louise Sandberg, and Bjerregaard Simonsen, Sebastian, 2025. Filling the GRACE/-FO gap of mass balance observation in central west Greenland by data-driven modelling. Annals of Glaciology, 66:e20, doi:10.1017/aog.2025.10019.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2025AnGla..66E..20P,
author = {{Puggaard}, Anna and {Hansen}, Nicolaj and {Schlager}, Elke and {S{\o}rensen}, Louise Sandberg and {Bjerregaard Simonsen}, Sebastian},
title = "{Filling the GRACE/-FO gap of mass balance observation in central west Greenland by data-driven modelling}",
journal = {Annals of Glaciology},
year = 2025,
month = jan,
volume = {66},
eid = {e20},
pages = {e20},
abstract = "{Continuous monitoring of the mass balance of the Greenland ice sheet is
crucial to assess its contribution to the rise of sea levels.
The GRACE and GRACE-FO missions have provided monthly estimates
of the Earth's gravity field since 2002, which have been widely
used to estimate monthly mass changes of ice sheets. However,
there is an 11 month gap between the two missions. Here, we
propose a data-driven approach that combines atmospheric
variables from the ERA5 reanalysis with GRACE-derived mass
anomalies from previous months to predict mass changes. Using an
auto-regressive structure, the model is naturally predictive for
shorter times without GRACE/-FO observations. The results show a
high r2-score (> 0.73) between model predictions and GRACE/-FO
observations. Validating the model's ability to reproduce mass
anomalies when observations are available builds confidence in
estimates used to bridge the GRACE and GRACE/-FO gap. Although
GRACE and GRACE-FO are treated equally by the model, we see a
decrease in model performance for the period covered by GRACE-
FO, indicating that they may not be as well-calibrated as
previously assumed. Gap predictions align well with mass change
estimates derived from other geodetic methods and remain within
the uncertainty envelope of the GRACE-FO observations.}",
doi = {10.1017/aog.2025.10019},
adsurl = {https://ui.adsabs.harvard.edu/abs/2025AnGla..66E..20P},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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