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

Q2 Earth and Planetary Sciences Geological Survey of Denmark and Greenland Bulletin Pub Date : 2019-07-08 DOI:10.34194/GEUSB-201943-02-01

W. Colgan, K. Mankoff, K. Kjeldsen, A. Bjørk, J. Box, S. Simonsen, L. Sørensen, S. A. Khan, A. Solgaard, R. Forsberg, H. Skourup, L. Stenseng, S. Kristensen, S. Hvidegaard, M. Citterio, N. Karlsson, X. Fettweis, A. Ahlstrøm, S. Andersen, D. As, R. Fausto

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引用次数: 9

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 (Sorensen 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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1995-2015年PROMICE对格陵兰冰盖物质平衡的评估

格陵兰冰盖监测计划(PROMICE)通过重复的空中测量测量了冰盖的高度和厚度，测量冰盖的平均高度为1708±5米(Sorensen等人，2018)。我们将这5415公里的调查称为“PROMICE周长”。在这里，我们按照Andersen等人(2015)的投入产出方法评估冰盖质量平衡。我们通过对PROMICE周界的冰通量进行下游修正来估计冰盖输出，或冰盖接地线上的冰流量。我们从冰盖输入或区域气候模式估计的面积综合冰盖表面质量平衡中减去这种冰流量。Andersen等人(2015)在2007年和2011年评估了冰盖质量平衡，而这一更新的投入产出评估现在估计了1995-2015年期间格陵兰冰盖的18个子部门每年海平面上升的贡献。

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来源期刊

Geological Survey of Denmark and Greenland Bulletin GEOLOGY-

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： GEUS Bulletin publishes geoscience research papers, monographs and map descriptions with a focus on Denmark, Greenland and the wider North Atlantic and Arctic region. We welcome submissions that fit this remit. Specifically, we publish: 1.Short articles intended as rapid communications that are of immediate interest to the international geoscience community (these include new research, datasets, methods or reviews) 2.Regular-length articles that document new research or a review of a topic of interest 3.Monographs (single volume works, by arrangement with the editorial office) 4.Maps and descriptive texts (produced by GEUS for Greenland and Denmark, by arrangement with the editorial office) GEUS Bulletin serves a broad geoscientific readership from research, industry, government agencies, NGOs and special interest groups.