Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL085954 |
A Major Collapse of Kangerlussuaq Glacier's Ice Tongue Between 1932 and 1933 in East Greenland | |
Vermassen, Flor1,2; Bjork, Anders A.2; Sicre, Marie-Alexandrine3; Jaeger, John M.4; Wangner, David J.1,2; Kjeldsen, Kristian K.1; Siggaard-Andersen, Marie-Louise2; Klein, Vincent3; Mouginot, Jeremie5,6; Kjar, Kurt H.2; Andresen, Camilla S.1 | |
2020-02-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | Denmark; France; USA |
英文摘要 | In recent years, several large outlet glaciers in Greenland lost their floating ice tongue, yet little is known regarding their stability over a longer timescale. Here we compile historical documents to demonstrate a major ice tongue collapse of Kangerlussuaq Glacier between 1932 and 1933. This event resulted in a 9-km retreat, exceeding any of the glacier's recent major retreat events. Sediment cores from the fjord are used to reconstruct sea surface temperatures and to investigate a potential sedimentological trace of the collapse. During the 1920s, local and regional sea surface temperatures and air temperatures increased rapidly, suggesting a climatic trigger for the collapse. Fjord bathymetry played an important role too, as the (partially) pinned ice tongue retreated off a submarine moraine during the event. This historical analogue of a glacier tongue collapse emphasizes the fragility of remaining ice tongues in North Greenland within a warming climate. Plain Language Summary In the past two decades, multiple Greenlandic glaciers retreated because their floating part (="ice tongue") melted and broke off. While it is believed that such events are the result of a warming climate, not much is known about how often or when such events have occurred in the past. In this study, we compiled multiple historical sources to show that Kangerlussuaq Glacier, one of Greenland's largest glaciers, retreated drastically between 1932 and 1933. During this event the ice tongue collapsed, leading to a 9-km retreat, which is more than during any of the glacier's recent retreat events. By studying fjord sediments we show that the ocean temperatures increased prior to the event, as did air temperatures. Thus, climatic warming likely triggered the collapse. While other glaciers had already started their retreat decades earlier, Kangerlussuaq Glacier had been stable until 1932, probably due to stabilizing effect of an underwater moraine. Overall, this study emphasizes that ice tongues are sensitive to climatic warming and highlights the precarious position of current ice tongues in Northern Greenland. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000529120100035 |
WOS关键词 | SOUTHEAST GREENLAND ; JAKOBSHAVN ISBRAE ; OCEANIC HEAT ; RETREAT ; KANGERDLUGSSUAQ ; DYNAMICS ; HELHEIM ; FJORDS ; SHEET ; ACCELERATION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/279645 |
专题 | 气候变化 |
作者单位 | 1.GEUS, Dept Glaciol & Climate, Copenhagen, Denmark; 2.Univ Copenhagen, Ctr GeoGenet, Copenhagen, Denmark; 3.Sorbonne Univ, LOCEAN, CNRS, Campus Pierre & Marie Curie, Paris, France; 4.Univ Florida, Dept Geol Sci, Gainesville, FL USA; 5.Univ Grenoble Alpes, CNRS, Grenoble, France; 6.Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA USA |
推荐引用方式 GB/T 7714 | Vermassen, Flor,Bjork, Anders A.,Sicre, Marie-Alexandrine,et al. A Major Collapse of Kangerlussuaq Glacier's Ice Tongue Between 1932 and 1933 in East Greenland[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(4). |
APA | Vermassen, Flor.,Bjork, Anders A..,Sicre, Marie-Alexandrine.,Jaeger, John M..,Wangner, David J..,...&Andresen, Camilla S..(2020).A Major Collapse of Kangerlussuaq Glacier's Ice Tongue Between 1932 and 1933 in East Greenland.GEOPHYSICAL RESEARCH LETTERS,47(4). |
MLA | Vermassen, Flor,et al."A Major Collapse of Kangerlussuaq Glacier's Ice Tongue Between 1932 and 1933 in East Greenland".GEOPHYSICAL RESEARCH LETTERS 47.4(2020). |
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