气候变化领域集成服务门户(CCPortal): Englacial Architecture and Age-Depth Constraints Across the West Antarctic Ice Sheet

CCPortal

DOI	10.1029/2019GL086663
	Englacial Architecture and Age-Depth Constraints Across the West Antarctic Ice Sheet
	Ashmore D.W.; Bingham R.G.; Ross N.; Siegert M.J.; Jordan T.A.; Mair D.W.F.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:6
英文摘要	The englacial stratigraphic architecture of internal reflection horizons (IRHs) as imaged by ice-penetrating radar (IPR) across ice sheets reflects the cumulative effects of surface mass balance, basal melt, and ice flow. IRHs, considered isochrones, have typically been traced in interior, slow-flowing regions. Here, we identify three distinctive IRHs spanning the Institute and Möller catchments that cover 50% of West Antarctica's Weddell Sea Sector and are characterized by a complex system of ice stream tributaries. We place age constraints on IRHs through their intersections with previous geophysical surveys tied to Byrd Ice Core and by age-depth modeling. We further show where the oldest ice likely exists within the region and that Holocene ice-dynamic changes were limited to the catchment's lower reaches. The traced IRHs from this study have clear potential to nucleate a wider continental-scale IRH database for validating ice sheet models. © 2020. The Authors.
英文关键词	Catchments; Glacial geology; Glaciers; Radar; Radar reflection; Radio systems; Runoff; Stratigraphy; AntArchitecture; Holocenes; Penetrating radar; Radio-echo sounding; West antarctica; Ice; age structure; catchment; echo sounding; englacial process; geophysical survey; ground penetrating radar; Holocene; ice core; ice stream; model validation; sequence stratigraphy; Antarctic Ice Sheet; Antarctica; Southern Ocean; Weddell Sea; West Antarctic Ice Sheet; 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/170572
作者单位	School of Environmental Sciences, University of Liverpool, Liverpool, United Kingdom; School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom; School of Geography, Politics and Sociology, Newcastle University, Newcastle upon Tyne, United Kingdom; Grantham Institute and Department of Earth Science and Engineering, Imperial College London, London, United Kingdom; British Antarctic Survey, Cambridge, United Kingdom
推荐引用方式 GB/T 7714	Ashmore D.W.,Bingham R.G.,Ross N.,et al. Englacial Architecture and Age-Depth Constraints Across the West Antarctic Ice Sheet[J],2020,47(6).
APA	Ashmore D.W.,Bingham R.G.,Ross N.,Siegert M.J.,Jordan T.A.,&Mair D.W.F..(2020).Englacial Architecture and Age-Depth Constraints Across the West Antarctic Ice Sheet.Geophysical Research Letters,47(6).
MLA	Ashmore D.W.,et al."Englacial Architecture and Age-Depth Constraints Across the West Antarctic Ice Sheet".Geophysical Research Letters 47.6(2020).