The Greenland ice sheet – snowline elevations at the end of the melt seasons from 2000 to 2017

Q2 Earth and Planetary Sciences Geological Survey of Denmark and Greenland Bulletin Pub Date : 2018-08-15 DOI:10.34194/geusb.v41.4346

Robert S. Fausto And the PROMICE team*

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引用次数: 3

Abstract

The Greenland ice sheet has experienced an average mass loss of 142 ± 49 Gt/yr from 1992 to 2011 (Shepherd et al. 2012), making it a significant contributor to sea-level rise. Part of the ice- sheet mass loss is the result of increased dynamic response of outlet glaciers (Rignot et al. 2011). The ice discharge from outlet glaciers can be quantified by coincident measurements of ice velocity and ice thickness (Thomas et al. 2000; van den Broeke et al. 2016). As part of the Programme for monitoring of the Greenland Ice Sheet (PROMICE; Ahlstrøm et al. 2008), three airborne surveys were carried out in 2007, 2011 and 2015, with the aim of measuring the changes in Greenland ice-sheet thicknesses. The purpose of the airborne surveys was to collect data to assess the dynamic mass loss of the Greenland ice sheet (Andersen et al. 2015). Here, we present these datasets of observations from ice-penetrating radar and airborne laser scanning, which, in combination, make us able to determine the ice thickness precisely. Surface-elevation changes between surveys are also presented, although we do not provide an in-depth scientific interpretation of these.

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格陵兰冰盖- 2000年至2017年融化季节结束时的雪线高度

从1992年到2011年，格陵兰冰盖的平均质量损失为142±49 Gt/年(Shepherd et al. 2012)，使其成为海平面上升的一个重要因素。冰盖质量损失的部分原因是出水口冰川动力响应增强的结果(Rignot et al. 2011)。出口冰川的冰流量可以通过同步测量冰速度和冰厚度来量化(Thomas et al. 2000;van den Broeke et al. 2016)。作为监测格陵兰冰盖方案的一部分;Ahlstrøm et al. 2008)，在2007年、2011年和2015年进行了三次航空调查，目的是测量格陵兰冰盖厚度的变化。航空调查的目的是收集数据，以评估格陵兰冰盖的动态质量损失(Andersen et al. 2015)。在这里，我们展示了冰层穿透雷达和机载激光扫描的观测数据集，它们结合在一起，使我们能够精确地确定冰层厚度。调查之间的地表高程变化也被呈现出来，尽管我们没有对这些变化提供深入的科学解释。

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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.