气候变化领域集成服务门户(CCPortal): Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery

CCPortal

DOI	10.5194/tc-9-613-2015
	Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery
	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.
发表日期	2015
ISSN	19940416
卷号	9 期号:2
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.
学科领域	continental shelf; ice flow; ice sheet; Last Glacial Maximum; paleoceanography; seafloor; streamflow; Antarctic Peninsula; Antarctica; West Antarctica
语种	英语
scopus关键词	continental shelf; ice flow; ice sheet; Last Glacial Maximum; paleoceanography; seafloor; streamflow; Antarctic Peninsula; 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/119925
作者单位	Istituto Nazionale di Oceanografia e di Geofisica Sperimentale (OGS), Borgo Grotta Gigante, Sgonico, 34010, Italy; Department of Geosciences/CESAM, University of Aveiro, Aveiro, 3810-193, Portugal; College of Marine Science, University of South Florida, St. Petersburg, FL 33701, United States; Department of Geosciences, University of Alaska Fairbanks, Fairbanks, AK 99775, United States; National Snow and Ice Data Center, University of Colorado, Boulder, CO 80309, United States; British Antarctic Survey, Cambridge, Cambridgeshire, CB3 0ET, United Kingdom; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, 27568, Germany; Korean Polar Research Institute, Incheon, 406-840, South Korea; Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77204, United States; Departament d'Estratigrafia, Paleontologia i Geociències Marines/GRR Marine Geosciences, Universitat de Barcelona, Barcelona, 08028, Spain; Department of Earth Science, Rice University,...
推荐引用方式 GB/T 7714	Lavoie C.,Domack E.W.,Pettit E.C.,et al. Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery[J],2015,9(2).
APA	Lavoie C..,Domack E.W..,Pettit E.C..,Scambos T.A..,Larter R.D..,...&Amblas D..(2015).Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery.Cryosphere,9(2).
MLA	Lavoie C.,et al."Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery".Cryosphere 9.2(2015).