气候变化领域集成服务门户(CCPortal): Repeat Subglacial Lake Drainage and Filling Beneath Thwaites Glacier

CCPortal

DOI	10.1029/2020GL089658
	Repeat Subglacial Lake Drainage and Filling Beneath Thwaites Glacier
	Malczyk G.; Gourmelen N.; Goldberg D.; Wuite J.; Nagler T.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:23
英文摘要	Active subglacial lakes have been identified throughout Antarctica, offering a window into subglacial environments and their impact on ice sheet mass balance. Here we use high-resolution altimetry measurements from 2010 to 2019 to show that a lake system under the Thwaites Glacier undertook a large episode of activity in 2017, only four years after the system underwent a substantial drainage event. Our observations suggest significant modifications of the drainage system between the two events, with 2017 experiencing greater upstream discharge, faster lake-to-lake connectivity, and the transfer of water within a closed system. Measured rates of lake recharge during the inter-drainage period are 137% larger than modeled estimates, suggesting processes that drive subglacial meltwater production, such as geothermal heat flux or basal friction, are currently underestimated. ©2020. The Authors.
英文关键词	Geothermal energy; Heat flux; Antarctica; Closed systems; Drainage systems; High resolution; Lake systems; Mass balance; Subglacial lakes; Subglacial meltwater; Lakes; drainage network; glacial hydrology; glacial lake; heat flux; ice sheet; meltwater; periglacial landform; recharge; subglacial environment; Antarctica; Thwaites Glacier; West Antarctica
语种	英语
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/169305
作者单位	School of Geosciences, University of Edinburgh, Edinburgh, United Kingdom; ENVEO IT GmbH, Innsbruck, Austria
推荐引用方式 GB/T 7714	Malczyk G.,Gourmelen N.,Goldberg D.,et al. Repeat Subglacial Lake Drainage and Filling Beneath Thwaites Glacier[J],2020,47(23).
APA	Malczyk G.,Gourmelen N.,Goldberg D.,Wuite J.,&Nagler T..(2020).Repeat Subglacial Lake Drainage and Filling Beneath Thwaites Glacier.Geophysical Research Letters,47(23).
MLA	Malczyk G.,et al."Repeat Subglacial Lake Drainage and Filling Beneath Thwaites Glacier".Geophysical Research Letters 47.23(2020).