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典型文献
Reconstructing the post-LGM deglacial history of Hollingsworth Glacier on Ricker Hills,Transantarctic Mountains,Antarctica
文献摘要:
The Transantarctic Mountains are an important corridor between the East Antarctic Ice Sheet and the Western Ross Sea,where most current ice streams and outlet glaciers arise.We investigated Ricker Hills,the largest exposed mountainous region between Southern Victoria Land and Terra Nova Bay,and dated the glacial landforms using in-situ cosmogenic-nuclide 10Be surface exposure dating to reconstruct the paleo-glacial dynamics.The surface of the Hollingsworth glacier lowered since the middle of Marine Isotope Stage(MIS)2(22.1 ka);therefore,the Last Glacial Maximum(LGM)occurred before that period.Cosmogenic,geomorphic,and climatic records constrained the glacial surface slope to be between 5.4° and 6.8°.The ice was 270-320 m thicker at the LGM(MIS 2)than presently but did not override the top surface of the Benson Knob.Moreover,previous glacial periods such as the local LGM(MIS 4)or Penultimate Glacial Maximum(MIS 6)maintained thicker ice than the LGM(MIS 2).The Ross Ice Shelf opening during the mid-Holocene(~6 ka)caused the rapid collapse of the terminal outlet glaciers and supplied notable snow accumulation upstream,which stagnated lowering.The greatest lowering and retreat occurred during the late Holocene(2.3~0.8 ka),when elephant seal colonies thrived in the Ross Embayment.
文献关键词:
作者姓名:
RHEE Hyun-Hee;SEONG Yeong-Bae;WOO Ju-Sun;Oh Changhwan;YU Byung-Yong
作者机构:
Division of Glacial Environment Research,Korea Polar Research Institute,Incheon 21990,Republic of Korea;Department of Geography Education,Korea University,Seoul 02841,Republic of Korea;School of Earth and Environmental Sciences,Seoul National University,Seoul 08826,Republic of Korea;Department of Earth and Environmental Science,Chungbuk National University,Cheongju 28644,Republic of Korea;AMS laboratory,Korea Institute of Science and Technology,Seoul 02792,Republic of Korea
引用格式:
[1]RHEE Hyun-Hee;SEONG Yeong-Bae;WOO Ju-Sun;Oh Changhwan;YU Byung-Yong-.Reconstructing the post-LGM deglacial history of Hollingsworth Glacier on Ricker Hills,Transantarctic Mountains,Antarctica)[J].山地科学学报(英文版),2022(05):1217-1230
A类:
deglacial,Hollingsworth,Transantarctic,Cosmogenic,override,Knob,Penultimate,thrived,Embayment
B类:
Reconstructing,post,LGM,history,Glacier,Ricker,Hills,Mountains,Antarctica,are,important,corridor,between,East,Ice,Sheet,Ross,Sea,where,most,current,ice,streams,outlet,glaciers,arise,investigated,largest,exposed,mountainous,region,Southern,Victoria,Land,Terra,Nova,Bay,dated,landforms,using,situ,cosmogenic,nuclide,10Be,surface,exposure,dating,reconstruct,paleo,dynamics,lowered,since,middle,Marine,Isotope,Stage,MIS,ka,therefore,Last,Glacial,Maximum,occurred,before,that,geomorphic,climatic,records,constrained,slope,was,thicker,than,presently,but,did,Benson,Moreover,previous,periods,such,local,maintained,Shelf,opening,during,Holocene,caused,rapid,collapse,terminal,supplied,notable,snow,accumulation,upstream,which,stagnated,lowering,greatest,retreat,late,when,elephant,seal,colonies
AB值:
0.562769
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