格陵兰冰盖监测方案:第一个温度和消融记录

Q2 Earth and Planetary Sciences Geological Survey of Denmark and Greenland Bulletin Pub Date : 1969-12-31 DOI:10.34194/GEUSB.V23.4876
D. As, R. Fausto, A. Ahlstrøm, S. Andersen, M. Andersen, M. Citterio, K. Edelvang, P. Gravesen, H. Machguth, F. Nick, S. Nielsen, A. Weidick
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引用次数: 108

摘要

格陵兰冰盖正在对气候变化做出反应。然而,大规模预算的估计差异很大,部分原因是气候变率,部分原因是评估大规模变化的技术存在不确定性(IPCC 2007)。然而,所有最近的估计都一致认为,冰盖正在失去质量(例如286gt /年;Velicogna 2009),并以加速的速度(Rignot et al. 2011)。最重要的是,负质量预算的地区正在迅速扩大(Khan et al. 2010)。质量损失同样归因于冰山产生和冰盖融化的增加(Van den Broeke et al. 2009)。由于对海平面的潜在影响,近年来不断增加的大规模损失引起了公众的注意,并引起了全世界的关注。有鉴于此,由丹麦和格陵兰地质调查局(GEUS)领导的格陵兰冰盖监测计划(PROMICE)于2007年启动(Ahlstrom & PROMICE项目小组2008年)。PROMICE利用自动气象站进行地表质量预算测量,利用卫星和航空调查的遥感数据量化冰山崩解造成的质量损失,并跟踪冰川范围的变化。在本文中,我们重点关注气象站的测量,这对于计算大气和冰盖之间的能量交换以及验证地表质量收支的模式计算至关重要。特别地,我们提出了观测到的温度,并研究了它们在2010年的高值如何影响格陵兰岛南部的消融。
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Programme for Monitoring of the Greenland Ice Sheet (PROMICE): first temperature and ablation record
The Greenland ice sheet is reacting to climate change. Yet, mass-budget estimates differ considerably, partly due to climatic variability and partly to uncertainties in the techniques of assessing mass change (IPCC 2007). Nevertheless, all recent estimates agree that the ice sheet is losing mass (e.g. 286 Gt/yr; Velicogna 2009) at an accelerating rate (Rignot et al. 2011). On top of this, the area with a negative mass budget is expanding rapidly (Khan et al. 2010). The mass loss is attributed equally to increases in both iceberg production and melting of the ice sheet (Van den Broeke et al. 2009). The increasing mass loss in recent years has caught public attention and given rise to concern worldwide due to its potential impact on sea level. In the light of this, the Programme for Monitoring of the Greenland Ice Sheet (PROMICE) was initiated in 2007 (Ahlstrom & PROMICE project team 2008), lead by the Geological Survey of Denmark and Greenland (GEUS). PROMICE undertakes surface mass-budget measurements using automatic weather stations, quantifies the mass loss by iceberg calving using remotely sensed data from satellites and airborne surveys and tracks changes in the extent of glaciers. In this paper, we focus on weather station measurements, which are crucial in calculating the energy exchange between the atmosphere and the ice sheet, and in validating model calculations of the surface mass budget. In particular, we present the observed temperatures and investigate how their high 2010 values affected ablation in southern Greenland.
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来源期刊
CiteScore
2.30
自引率
0.00%
发文量
0
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.
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