气候变化领域集成服务门户(CCPortal): Vertical Land Motion Due To Present-Day Ice Loss From Greenland's and Canada's Peripheral Glaciers

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DOI	10.1029/2023GL104851
	Vertical Land Motion Due To Present-Day Ice Loss From Greenland's and Canada's Peripheral Glaciers
	Berg, D.; Barletta, V. R.; Hassan, J.; Lippert, E. Y. H.; Colgan, W.; Bevis, M.; Steffen, R.; Khan, S. A.
发表日期	2024
ISSN	0094-8276
EISSN	1944-8007
起始页码	51
结束页码	2
卷号	51 期号:2
英文摘要	Greenland's bedrock responds to ongoing ice loss with an elastic vertical land motion (VLM) that is measured by Greenland's Global Navigation Satellite System (GNSS) Network (GNET). The measured VLM also contains other contributions, including the long-term viscoelastic response of the Earth to the deglaciation of the last glacial period. Greenland's ice sheet (GrIS) produces the most significant contribution to the total VLM. The contribution of peripheral glaciers (PGs) from both Greenland (GrPGs) and Arctic Canada (CanPGs) has not carefully been accounted for in previous GNSS analyses. This is a significant concern, since GNET stations are often closer to PGs than to the ice sheet. We find that, PGs produce significant elastic rebound, especially in North and East Greenland. Across these regions, the PGs produce up to 32% of the elastic rebound. For a few stations in the North, the VLM from PGs is larger than that due to the GrIS. The solid Earth has long been compressed by the weight of overlying ice caps and ice sheets. As climate change causes ice to melt, and these loads diminish, the solid Earth relaxes, producing instantaneous elastic rebound and delayed viscoelastic rebound of the bedrock. Such displacements are recorded by the 58 permanent Global Navigation Satellite System (GNSS) stations that comprise the Greenland GNSS Network (GNET). So far, only the ice mass changes from the ice sheet have been considered in the analyses of deformation recorded by GNET. Here, we evaluate the contribution from the peripheral glaciers, which are often much closer to the stations than the ice sheet. We find that at many stations, the signal produced by the peripheral glaciers is non-negligible, especially in North and East Greenland. This allows us to better understand the residual rebound signal produced by the end of the last ice age. Elastic rebound due to ice loss from peripheral glaciers can exceed that due to ice sheet lossThis effect is most significant at Global Navigation Satellite System Network (GNET) sites in North and East GreenlandPeripheral glacier loss should be acknowledged when isolating glacial isostatic adjustment from GNET
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001142039900001
来源期刊	GEOPHYSICAL RESEARCH LETTERS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305118
作者单位	Technical University of Denmark; Geological Survey Of Denmark & Greenland; University System of Ohio; Ohio State University
推荐引用方式 GB/T 7714	Berg, D.,Barletta, V. R.,Hassan, J.,et al. Vertical Land Motion Due To Present-Day Ice Loss From Greenland's and Canada's Peripheral Glaciers[J],2024,51(2).
APA	Berg, D..,Barletta, V. R..,Hassan, J..,Lippert, E. Y. H..,Colgan, W..,...&Khan, S. A..(2024).Vertical Land Motion Due To Present-Day Ice Loss From Greenland's and Canada's Peripheral Glaciers.GEOPHYSICAL RESEARCH LETTERS,51(2).
MLA	Berg, D.,et al."Vertical Land Motion Due To Present-Day Ice Loss From Greenland's and Canada's Peripheral Glaciers".GEOPHYSICAL RESEARCH LETTERS 51.2(2024).