气候变化领域集成服务门户(CCPortal): Sentinel-1 Detects Firn Aquifers in the Greenland Ice Sheet

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DOI	10.1029/2019GL085192
	Sentinel-1 Detects Firn Aquifers in the Greenland Ice Sheet
	Brangers I.; Lievens H.; Miège C.; Demuzere M.; Brucker L.; De Lannoy G.J.M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:3
英文摘要	Firn aquifers in Greenland store liquid water within the upper ice sheet and impact the hydrological system. Their location and area have been estimated with airborne radar sounder surveys (Operation IceBridge, OIB). However, the OIB coverage is limited to narrow flight lines, offering an incomplete view. Here, we show the ability of satellite radar measurements from Sentinel-1 to map firn aquifers across all of Greenland at 1 km (Formula presented.) resolution. The detection of aquifers relies on a delay in the freezing of meltwater within the firn above the water table, causing a distinctive pattern in the radar backscatter. The Sentinel-1 aquifer locations are in very good agreement with those detected along the OIB flight lines (Cohen's (Formula presented.)). The total aquifer area is estimated at 54,800 km (Formula presented.). With continuity of Sentinel-1 ensured until 2030, our study lays a foundation for monitoring the future response of firn aquifers to climate change. ©2020. The Authors.
英文关键词	Climate change; Glaciers; Hydrogeology; Radar; Radar measurement; Future response; Greenland; Greenland Ice Sheet; Hydrological system; Operation IceBridge; Radar backscatter; Sentinel-1; Water tables; Aquifers
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/170739
作者单位	Department of Earth and Environmental Sciences, KU Leuven, Heverlee, Belgium; Department of Environment, Ghent University, Ghent, Belgium; Department of Geography, Rutgers, The State University of New Jersey, New Brunswick, NJ, United States; Department of Geography, Ruhr-University Bochum, Bochum, Germany; Cryospheric Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States; GESTAR, Universities Space Research Association, Columbia, MD, United States
推荐引用方式 GB/T 7714	Brangers I.,Lievens H.,Miège C.,et al. Sentinel-1 Detects Firn Aquifers in the Greenland Ice Sheet[J],2020,47(3).
APA	Brangers I.,Lievens H.,Miège C.,Demuzere M.,Brucker L.,&De Lannoy G.J.M..(2020).Sentinel-1 Detects Firn Aquifers in the Greenland Ice Sheet.Geophysical Research Letters,47(3).
MLA	Brangers I.,et al."Sentinel-1 Detects Firn Aquifers in the Greenland Ice Sheet".Geophysical Research Letters 47.3(2020).