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Greenland ice sheet mass balance assessed by PROMICE (1995–2015)

descriptionPublicationkeyboard_double_arrow_right Article , Journal 08 Jul 2019 Denmark Publisher:Geological Survey of Denmark and GreenlandJournal:Geological Survey of Denmark and Greenland Bulletin, volume 43 (issn: 1904-4666, eissn: 1604-8156,

Authors: Colgan, William; Mankoff, Kenneth; Kjeldsen, Kristian Kjellerup; Bjørk, Anders Anker; Box, Jason; Simonsen, Sebastian Bjerregaard; Sørensen, Louise; +14 Authors

doi: 10.34194/geusb-201943-02-01

Greenland ice sheet mass balance assessed by PROMICE (1995–2015)

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Abstract

The Programme for Monitoring of the Greenland Ice Sheet (PROMICE) has measured ice-sheet elevation and thickness via repeat airborne surveys circumscribing the ice sheet at an average elevation of 1708 ± 5 m (Sørensen et al. 2018). We refer to this 5415 km survey as the ‘PROMICE perimeter’. Here, we assess ice-sheet mass balance following the input-output approach of Andersen et al. (2015). We estimate ice-sheet output, or the ice discharge across the ice-sheet grounding line, by applying downstream corrections to the ice flux across the PROMICE perimeter. We subtract this ice discharge from ice-sheet input, or the area-integrated, ice sheet surface mass balance, estimated by a regional climate model. While Andersen et al. (2015) assessed ice-sheet mass balance in 2007 and 2011, this updated input-output assessment now estimates the annual sea-level rise contribution from eighteen sub-sectors of the Greenland ice sheet over the 1995–2015 period.

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Denmark

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Keywords

QE1-996.5, QC801-809, Climate Change, Greenland Ice Sheet, Greenland, Geophysics. Cosmic physics, Geology, PROMICE, Database, /dk/atira/pure/sustainabledevelopmentgoals/climate_action; name=SDG 13 - Climate Action

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