气候变化领域集成服务门户(CCPortal): Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica

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DOI	10.5194/tc-14-4507-2020
	Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica
	Napoleoni F.; Jamieson S.S.R.J.; Ross N.; Bentley M.J.; Rivera A.; Smith A.M.; Siegert M.J.; Paxman G.J.G.; Gacitúa G.; Uribe J.A.; Zamora R.; Brisbourne A.M.; Vaughan D.G.
发表日期	2020
ISSN	19940416
起始页码	4507
结束页码	4524
卷号	14 期号:12
英文摘要	Subglacial water plays an important role in ice sheet dynamics and stability. Subglacial lakes are often located at the onset of ice streams and have been hypothesised to enhance ice flow downstream by lubricating the ice-bed interface. The most recent subglacial-lake inventory of Antarctica mapped nearly 400 lakes, of which ∼ 14 % are found in West Antarctica. Despite the potential importance of subglacial water for ice dynamics, there is a lack of detailed subglacial-water characterisation in West Antarctica. Using radio-echo sounding data, we analyse the ice-bed interface to detect subglacial lakes. We report 33 previously uncharted subglacial lakes and present a systematic analysis of their physical properties. This represents a ∼ 40% increase in subglacial lakes in West Antarctica. Additionally, a new digital elevation model of basal topography of the Ellsworth Subglacial Highlands was built and used to create a hydropotential model to simulate the subglacial hydrological network. This allows us to characterise basal hydrology, determine subglacial water catchments and assess their connectivity. We show that the simulated subglacial hydrological catchments of the Rutford Ice Stream, Pine Island Glacier and Thwaites Glacier do not correspond to their ice surface catchments. © 2020 Author(s). This work is distributed under the Creative Commons Attribution 4.0 License.
英文关键词	echo sounding; glacial hydrology; glacial lake; hydrodynamics; ice sheet; ice stream; lake water; melting; subglacial deposit; upland region; Antarctica; Ellsworth Land; West Antarctica
语种	英语
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/202166
作者单位	Department of Geography, Durham University, Durham, DH1 3LE, United Kingdom; School of Geography Politics and Sociology, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom; Departamento de Geografía, Universidad de Chile, Portugal, Santiago, 84, Chile; Instituto de Conservación Biodiversidad y Territorio, Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, Valdivia, Chile; British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET, United Kingdom; Department of Earth Science and Engineering, Grantham Institute, Imperial College London, South Kensington, London, SW7 2AZ, United Kingdom; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States; Instituto de Ciencias Físicas y Matemáticas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile; Centro de Estudios Científicos, Arturo Prat 514, Valdivia, Chile
推荐引用方式 GB/T 7714	Napoleoni F.,Jamieson S.S.R.J.,Ross N.,et al. Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica[J],2020,14(12).
APA	Napoleoni F..,Jamieson S.S.R.J..,Ross N..,Bentley M.J..,Rivera A..,...&Vaughan D.G..(2020).Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica.Cryosphere,14(12).
MLA	Napoleoni F.,et al."Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica".Cryosphere 14.12(2020).