气候变化领域集成服务门户(CCPortal): West Antarctic sites for subglacial drilling to test for past ice-sheet collapse

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DOI	10.5194/tc-12-2741-2018
	West Antarctic sites for subglacial drilling to test for past ice-sheet collapse
	Spector P.; Stone J.; Pollard D.; Hillebrand T.; Lewis C.; Gombiner J.
发表日期	2018
ISSN	19940416
卷号	12 期号:8
英文摘要	Mass loss from the West Antarctic Ice Sheet (WAIS) is increasing, and there is concern that an incipient large-scale deglaciation of the marine basins may already be underway. Measurements of cosmogenic nuclides in subglacial bedrock surfaces have the potential to establish whether and when the marine-based portions of the WAIS deglaciated in the past. However, because most of the bedrock revealed by ice-sheet collapse would remain below sea level, shielded from the cosmic-ray flux, drill sites for subglacial sampling must be located in areas where thinning of the residual ice sheet would expose presently subglacial bedrock surfaces. In this paper we discuss the criteria and considerations for choosing drill sites where subglacial samples will provide maximum information about WAIS extent during past interglacial periods. We evaluate candidate sites in West Antarctica and find that sites located adjacent to the large marine basins of West Antarctica will be most diagnostic of past ice-sheet collapse. There are important considerations for drill site selection on the kilometer scale that can only be assessed by field reconnaissance. As a case study of these considerations, we describe reconnaissance at sites in West Antarctica, focusing on the Pirrit Hills, where in the summer of 2016-2017 an 8 m bedrock core was retrieved from below 150 m of ice. © 2018. Author(s).
学科领域	bedrock; collapse; deglaciation; ice sheet; interglacial; sea level change; site selection; subglacial environment; Antarctic Ice Sheet; Antarctica; West Antarctic Ice Sheet; West Antarctica; West Antarctica
语种	英语
scopus关键词	bedrock; collapse; deglaciation; ice sheet; interglacial; sea level change; site selection; subglacial environment; Antarctic Ice Sheet; Antarctica; West Antarctic Ice Sheet; West Antarctica; West Antarctica
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119080
作者单位	Department of Earth and Space Sciences, University of Washington, Seattle, WA, United States; Berkeley Geochronology Center, 2455 Ridge Road, Berkeley, CA, United States; Earth and Environmental Systems Institute, Pennsylvania State University, University Park, PA, United States; Center for Remote Sensing of Ice Sheets (CReSIS), University of Kansas, Lawrence, KS, United States
推荐引用方式 GB/T 7714	Spector P.,Stone J.,Pollard D.,et al. West Antarctic sites for subglacial drilling to test for past ice-sheet collapse[J],2018,12(8).
APA	Spector P.,Stone J.,Pollard D.,Hillebrand T.,Lewis C.,&Gombiner J..(2018).West Antarctic sites for subglacial drilling to test for past ice-sheet collapse.Cryosphere,12(8).
MLA	Spector P.,et al."West Antarctic sites for subglacial drilling to test for past ice-sheet collapse".Cryosphere 12.8(2018).