Greenland Mass Trends From Airborne and Satellite Altimetry During 2011-2020.
Greenland Ice Sheet
ice dynamics
mass loss
satellite altimetry
surface mass balance
vertical land motion
Journal
Journal of geophysical research. Earth surface
ISSN: 2169-9003
Titre abrégé: J Geophys Res Earth Surf
Pays: United States
ID NLM: 101661774
Informations de publication
Date de publication:
Apr 2022
Apr 2022
Historique:
received:
04
11
2021
revised:
07
03
2022
accepted:
14
03
2022
entrez:
22
7
2022
pubmed:
23
7
2022
medline:
23
7
2022
Statut:
ppublish
Résumé
We use satellite and airborne altimetry to estimate annual mass changes of the Greenland Ice Sheet. We estimate ice loss corresponding to a sea-level rise of 6.9 ± 0.4 mm from April 2011 to April 2020, with a highest annual ice loss rate of 1.4 mm/yr sea-level equivalent from April 2019 to April 2020. On a regional scale, our annual mass loss timeseries reveals 10-15 m/yr dynamic thickening at the terminus of Jakobshavn Isbræ from April 2016 to April 2018, followed by a return to dynamic thinning. We observe contrasting patterns of mass loss acceleration in different basins across the ice sheet and suggest that these spatiotemporal trends could be useful for calibrating and validating prognostic ice sheet models. In addition to resolving the spatial and temporal fingerprint of Greenland's recent ice loss, these mass loss grids are key for partitioning contemporary elastic vertical land motion from longer-term glacial isostatic adjustment (GIA) trends at GPS stations around the ice sheet. Our ice-loss product results in a significantly different GIA interpretation from a previous ice-loss product.
Identifiants
pubmed: 35864950
doi: 10.1029/2021JF006505
pii: JGRF21532
pmc: PMC9286656
doi:
Types de publication
Journal Article
Langues
eng
Pagination
e2021JF006505Informations de copyright
© 2022 The Authors.
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