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

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...

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Bibliographic Details
Published in:Geological Survey of Denmark and Greenland Bulletin
Main Authors: Colgan, W., Mankoff, K.D., Kjeldsen, K.K., Björk, A.A., Box, J.E., Simonsen, S.B., Sørensen, L.S., Khan, S.A., Solgaard, A.M., Forsberg, R., Skourup, H., Stenseng, L., Kristensen, S.S., Hvidegaard, S.M., Citterio, M., Karlsson, N., Fettweis, X., Ahlstrom, A.P., Andersen, S.B., van As, D., Fausto, R.S.
Format: Article in Journal/Newspaper
Language:English
Published: 2019
Subjects:
Greenland
Ice Sheet
Online Access:https://www.vliz.be/imisdocs/publications/381814.pdf
Description
Summary: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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