气候变化领域集成服务门户(CCPortal): The state of rock debris covering Earth’s glaciers

CCPortal

DOI	10.1038/s41561-020-0615-0
	The state of rock debris covering Earth’s glaciers
	Herreid S.; Pellicciotti F.
发表日期	2020
ISSN	17520894
起始页码	621
结束页码	627
卷号	13 期号:9
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.
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206786
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
推荐引用方式 GB/T 7714	Herreid S.,Pellicciotti F.. The state of rock debris covering Earth’s glaciers[J],2020,13(9).
APA	Herreid S.,&Pellicciotti F..(2020).The state of rock debris covering Earth’s glaciers.Nature Geoscience,13(9).
MLA	Herreid S.,et al."The state of rock debris covering Earth’s glaciers".Nature Geoscience 13.9(2020).