Reconstructing the post-LGM deglacial history of Hollingsworth Glacier on Ricker Hills,Transantarctic Mountains,Antarctica

作     者：RHEE Hyun-Hee SEONG Yeong-Bae WOO Ju-Sun Oh Changhwan YU Byung-Yong RHEE Hyun-Hee;SEONG Yeong-Bae;WOO Ju-Sun;Oh Changhwan;YU Byung-Yong

作者机构：Division of Glacial Environment ResearchKorea Polar Research InstituteIncheon 21990Republic of Korea Department of Geography EducationKorea UniversitySeoul 02841Republic of Korea School of Earth and Environmental SciencesSeoul National UniversitySeoul 08826Republic of Korea Department of Earth and Environmental ScienceChungbuk National UniversityCheongju 28644Republic of Korea AMS laboratoryKorea Institute of Science and TechnologySeoul 02792Republic of Korea 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2022年第19卷第5期

页      面：1217-1230页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 0705[理学-地理学] 070501[理学-自然地理学] 

基　　金：supported by Korea Polar Research Institute(PE22090) 

主　　题：East Antarctic Ice Sheet Last Glacial Maximum Deglaciation Holocene Cosmogenic nuclide exposure dating Glacier reconstruction 

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 *** 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 10 Be surface exposure dating to reconstruct the paleo-glacial *** 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 ***,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 ***,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 *** greatest lowering and retreat occurred during the late Holocene(2.3~0.8 ka),when elephant seal colonies thrived in the Ross Embayment.