Greenland Mass Trends From Airborne and Satellite Altimetry During 2011-2020.

[en] 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.

Disciplines :

Earth sciences & physical geography

Author, co-author :

Khan, Shfaqat A ; DTU Space Technical University of Denmark Kongens Lyngby Denmark

Bamber, Jonathan L ; Bristol Glaciology Centre University of Bristol Bristol UK ; Department of Aerospace and Geodesy Technical University Munich Munich Germany

Rignot, Eric ; Department of Earth System Science University of California Irvine Irvine CA USA

Helm, Veit ; Glaciology Section Alfred Wegener Institute Bremerhaven Germany

Aschwanden, Andy ; University of Alaska Fairbanks Fairbanks AK USA

Holland, David M ; New York University New York NY USA ; Center for Global Sea Level Change New York University Abu Dhabi UAE

van den Broeke, Michiel ; Institute for Marine and Atmospheric Research Utrecht Utrecht University Utrecht The Netherlands

King, Michalea ; Applied Physics Laboratory University of Washington Seattle WA USA

Noël, Brice ; Université de Liège - ULiège > Département de géographie > Climatologie et Topoclimatologie ; Institute for Marine and Atmospheric Research Utrecht Utrecht University Utrecht The Netherlands

Truffer, Martin ; University of Alaska Fairbanks Fairbanks AK USA

More authors (4 more)

Language :

English

Title :

Greenland Mass Trends From Airborne and Satellite Altimetry During 2011-2020.

Publication date :

April 2022

Journal title :

Journal of Geophysical Research. Earth Surface

ISSN :

2169-9003

eISSN :

2169-9011

Publisher :

John Wiley and Sons Inc, United States

Volume :

127

Issue :

Pages :

e2021JF006505

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://onlinelibrary.wiley.com/doi/pdf/10.1029/2021JF006505

Funders :

ERC - European Research Council

Funding text :

S A Khan acknowledges support from the Independent Research Fund Denmark- Natural Sciences Grant No. 1026-00085B and Villum Fonden (Villum Experiment Programme) Project No. 40718. J L Bamber acknowledges support from European Research Council Grant No. 694188 (GlobalMass) and German Federal Ministry of Education and Research in the framework of the international future AI lab (Grant number: 01DD20001). D M Holland is grateful for support from NYU Abu Dhabi grant G1204 and NASA's Ocean Melting Greenland project. B. No?l was funded by the NWO VENI grant VI. Veni.192.019. W. Colgan acknowledges support from the Independent Research Fund Denmark (8049-00003B) and the Programme for Monitoring of the Greenland Ice Sheet. Finally, we thank the editor (Olga Sergienko), anonymous associate editor and two anonymous reviewers for insightful and constructive comments to earlier drafts of this manuscript.S A Khan acknowledges support from the Independent Research Fund Denmark‐ Natural Sciences Grant No. 1026‐00085B and Villum Fonden (Villum Experiment Programme) Project No. 40718. J L Bamber acknowledges support from European Research Council Grant No. 694188 (GlobalMass) and German Federal Ministry of Education and Research in the framework of the international future AI lab (Grant number: 01DD20001). D M Holland is grateful for support from NYU Abu Dhabi grant G1204 and NASA's Ocean Melting Greenland project. B. Noël was funded by the NWO VENI grant VI. Veni.192.019. W. Colgan acknowledges support from the Independent Research Fund Denmark (8049‐00003B) and the Programme for Monitoring of the Greenland Ice Sheet. Finally, we thank the editor (Olga Sergienko), anonymous associate editor and two anonymous reviewers for insightful and constructive comments to earlier drafts of this manuscript.

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