DOI: 10.1038/s41561-018-0082-z
论文题名: Net retreat of Antarctic glacier grounding lines
作者: Konrad H. ; Shepherd A. ; Gilbert L. ; Hogg A.E. ; McMillan M. ; Muir A. ; Slater T.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2018
卷: 11, 期: 4 起始页码: 258
结束页码: 262
语种: 英语
英文摘要: Grounding lines are a key indicator of ice-sheet instability, because changes in their position reflect imbalance with the surrounding ocean and affect the flow of inland ice. Although the grounding lines of several Antarctic glaciers have retreated rapidly due to ocean-driven melting, records are too scarce to assess the scale of the imbalance. Here, we combine satellite altimeter observations of ice-elevation change and measurements of ice geometry to track grounding-line movement around the entire continent, tripling the coverage of previous surveys. Between 2010 and 2016, 22%, 3% and 10% of surveyed grounding lines in West Antarctica, East Antarctica and at the Antarctic Peninsula retreated at rates faster than 25 m yr-1 (the typical pace since the Last Glacial Maximum) and the continent has lost 1,463 km2 ± 791 km2 of grounded-ice area. Although by far the fastest rates of retreat occurred in the Amundsen Sea sector, we show that the Pine Island Glacier grounding line has stabilized, probably as a consequence of abated ocean forcing. On average, Antarctica's fast-flowing ice streams retreat by 110 metres per metre of ice thinning. © 2018 The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105581
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Centre for Polar Observation and Modelling, University of Leeds, Leeds, United Kingdom; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany; Centre for Polar Observation and Modelling, University College London, London, United Kingdom
Recommended Citation:
Konrad H.,Shepherd A.,Gilbert L.,et al. Net retreat of Antarctic glacier grounding lines[J]. Nature Geoscience,2018-01-01,11(4)