globalchange  > 影响、适应和脆弱性
DOI: 10.5194/tc-9-613-2015
Scopus记录号: 2-s2.0-84926430069
论文题名:
Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery
作者: Lavoie C; , Domack E; W; , Pettit E; C; , Scambos T; A; , Larter R; D; , Schenke H; -W; , Yoo K; C; , Gutt J; , Wellner J; , Canals M; , Anderson J; B; , Amblas D
刊名: Cryosphere
ISSN: 19940416
出版年: 2015
卷: 9, 期:2
起始页码: 613
结束页码: 629
语种: 英语
英文关键词: continental shelf ; ice flow ; ice sheet ; Last Glacial Maximum ; paleoceanography ; seafloor ; streamflow ; Antarctic Peninsula ; Antarctica ; West Antarctica
英文摘要: We present a new seafloor map for the northern Antarctic Peninsula (AP), including swath multibeam data sets from five national programs. Our map allows for the examination and interpretation of Last Glacial Maximum (LGM) paleo-ice-flow paths developed on the seafloor from the preservation of mega-scale glacial lineations, drumlinized features, and selective linear erosion. We combine this with terrestrial observations of flow direction to place constraints on ice divides and ice domes on the AP continental shelf during the LGM time interval. The results show a flow bifurcation as ice exits the Larsen B embayment. Flow emanating off the Seal Nunataks (including Robertson Island) is directed toward the southeast, then eastward as the flow transits toward the Robertson Trough. A second, stronger "streaming flow" is directed toward the southeast, then southward as ice overflowed the tip of the Jason Peninsula to reach the southern perimeter of the embayment. Our reconstruction also refines the extent of at least five other distinct paleo-ice-stream systems that, in turn, serve to delineate seven broad regions where contemporaneous ice domes must have been centered on the continental shelf at LGM. Our reconstruction is more detailed than other recent compilations because we followed specific ice-flow indicators and have kept tributary flow paths parallel. © Author(s) 2015.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75323
Appears in Collections:影响、适应和脆弱性
气候变化与战略

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作者单位: Istituto Nazionale di Oceanografia e di Geofisica Sperimentale (OGS), Borgo Grotta Gigante, Sgonico, Italy; Department of Geosciences/CESAM, University of Aveiro, Aveiro, Portugal; College of Marine Science, University of South Florida, St. Petersburg, FL, United States; Department of Geosciences, University of Alaska Fairbanks, Fairbanks, AK, United States; National Snow and Ice Data Center, University of Colorado, Boulder, CO, United States; British Antarctic Survey, Cambridge, Cambridgeshire, United Kingdom; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany; Korean Polar Research Institute, Incheon, South Korea; Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX, United States; Departament d'Estratigrafia, Paleontologia i Geociències Marines/GRR Marine Geosciences, Universitat de Barcelona, Barcelona, Spain; Department of Earth Science, Rice University, Houston, TX, United States

Recommended Citation:
Lavoie C,, Domack E,W,et al. Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery[J]. Cryosphere,2015-01-01,9(2)
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