气候变化领域集成服务门户(CCPortal): Constraining an Ocean Model Under Getz Ice Shelf; Antarctica; Using A Gravity-Derived Bathymetry

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DOI	10.1029/2019GL086522
	Constraining an Ocean Model Under Getz Ice Shelf; Antarctica; Using A Gravity-Derived Bathymetry
	Millan R.; St-Laurent P.; Rignot E.; Morlighem M.; Mouginot J.; Scheuchl B.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:13
英文摘要	Getz Ice Shelf, the largest producer of ice shelf meltwater in Antarctica, buttresses glaciers that hold enough ice to raise sea level by 22 cm. We present a new bathymetry of its sub-ice shelf cavity using a three-dimensional inversion of airborne gravity data constrained by multibeam bathymetry at sea and a reconstruction of the bedrock from mass conservation on land. The new bathymetry is deeper than previously estimated with differences exceeding 500 m in a number of regions. When incorporated into an ocean model, it yields a better description of the spatial distribution of ice shelf melt, specifically along glacier grounding lines. While the melt intensity is overestimated because of a positive bias in ocean thermal forcing, the study reveals the main pathways along which warm oceanic water enters the cavity and corroborates the observed rapid retreat of Berry Glacier along a deep channel with a retrograde bed slope. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Bathymetry; Gravitation; Sea level; Airborne gravity datum; Grounding line; Mass conservation; Multibeam bathymetry; Ocean model; Ocean thermals; Oceanic waters; Positive bias; Ice; airborne survey; bathymetry; bedrock; environmental modeling; glacier retreat; gravity; grounding line; ice shelf; meltwater; ocean; spatial distribution; Antarctica; Getz Ice Shelf; 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/170147
作者单位	IGE, Univ. Grenoble Alpes, CNRS, IRD, Grenoble INP, Grenoble, France; Department of Earth System Science, University of California Irvine, Irvine, CA, United States; Center for Coastal Physical Oceanography, Old Dominion University, Norfolk, VA, United States; Virginia Institute of Marine Science, William & Mary, Gloucester Point, VA, United States; Jet Propulsion Laboratory, Caltech, Pasadena, CA, United States; Department of Civil and Environmental Engineering, University of California Irvine, Irvine, CA, United States
推荐引用方式 GB/T 7714	Millan R.,St-Laurent P.,Rignot E.,et al. Constraining an Ocean Model Under Getz Ice Shelf; Antarctica; Using A Gravity-Derived Bathymetry[J],2020,47(13).
APA	Millan R.,St-Laurent P.,Rignot E.,Morlighem M.,Mouginot J.,&Scheuchl B..(2020).Constraining an Ocean Model Under Getz Ice Shelf; Antarctica; Using A Gravity-Derived Bathymetry.Geophysical Research Letters,47(13).
MLA	Millan R.,et al."Constraining an Ocean Model Under Getz Ice Shelf; Antarctica; Using A Gravity-Derived Bathymetry".Geophysical Research Letters 47.13(2020).