DOI: 10.1038/s41561-020-0615-0
论文题名: The state of rock debris covering Earth’s glaciers
作者: Herreid S. ; Pellicciotti F.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2020
卷: 13, 期: 9 起始页码: 621
结束页码: 627
语种: 英语
英文摘要: Rock debris can accumulate on glacier surfaces and dramatically reduce glacier melt. The structure of a debris cover is unique to each glacier and sensitive to climate. Despite this, debris cover has been omitted from global glacier models and forecasts of their response to a changing climate. Fundamental to resolving these omissions is a global map of debris cover and an estimate of its future spatial evolution. Here we use Landsat imagery and a detailed correction to the Randolph Glacier Inventory to show that 7.3% of mountain glacier area is debris covered and over half of Earth’s debris is concentrated in three regions: Alaska (38.6% of total debris-covered area), Southwest Asia (12.6%) and Greenland (12.0%). We use a set of new metrics, which include stage, the current position of a glacier on its trajectory towards reaching its spatial carrying capacity of debris cover, to quantify the state of glaciers. Debris cover is present on 44% of Earth’s glaciers and prominent (>1.0 km2) on 15%. Of Earth’s glaciers, 20% have a substantial percentage of debris cover for which the net stage is 36% and the bulk of individual glaciers have evolved beyond an optimal moraine configuration favourable for debris-cover expansion. Use of this dataset in global-scale models will enable improved estimates of melt over 10.6% of the global glacier domain. © 2020, The Author(s), under exclusive licence to Springer Nature Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169611
Appears in Collections: 气候变化与战略
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作者单位: Department of Geography, Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne, United Kingdom; Swiss Federal Research Institute WSL, Birmensdorf, Switzerland
Recommended Citation:
Herreid S.,Pellicciotti F.. The state of rock debris covering Earth’s glaciers[J]. Nature Geoscience,2020-01-01,13(9)