globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2014.05.007
Scopus记录号: 2-s2.0-84901916495
论文题名:
East Antarctic deglaciation and the link to global cooling during the Quaternary: Evidence from glacial geomorphology and 10Be surface exposure dating of the Sør Rondane Mountains, Dronning Maud Land
作者: Suganuma Y.; Miura H.; Zondervan A.; Okuno J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 97
起始页码: 102
结束页码: 120
语种: 英语
英文关键词: Beryllium-10 ; East Antarctic Ice Sheet ; Glacial isostatic adjustment (GIA) ; Quaternary ; Southern Ocean ; Surface exposure dating
Scopus关键词: Climate change ; Glaciers ; Sea level ; Weathering ; Beryllium-10 ; East antarctic ice sheets ; Glacial isostatic adjustment ; Quaternary ; Southern ocean ; Surface exposure dating ; Glacial geology ; cooling ; dating method ; deglaciation ; geomorphology ; glacial rebound ; ice sheet ; Quaternary ; sea level change ; Antarctica ; East Antarctica ; Queen Maud Land ; Southern Ocean
英文摘要: Reconstructing past variability of the Antarctic ice sheets is essential to understand their stability and to anticipate their contribution to sea level change as a result of future climate change. Recent studies have reported a significant decrease in thickness of the East Antarctic Ice Sheet (EAIS) during the last several million years. However, the geographical extent of this decrease and subsequent isostatic rebound remain uncertain. In this study, we reconstruct the magnitude and timing of ice sheet retreat at the Sør Rondane Mountains in Dronning Maud Land, East Antarctica, based on detailed geomorphological survey, cosmogenic exposure dating, and glacial isostatic adjustment modeling. Three distinct deglaciation phases are identified for this sector during the Quaternary, based on rock weathering and 10Be surface exposure data. We estimate that the ice sheet thinned by at least 500m during the Pleistocene. This thinning is attributed to the reorganization of Southern Ocean circulation associated with global cooling into the Pleistocene, which reduced the transport of moisture from the Southern Ocean to the interior of EAIS. The data also show that since the Last Glacial Maximum the ice surface has lowered less than ca50m and that this lowering probably started after ca14ka. This suggests that the EAIS in Dronning Maud Land is unlikely to have been a major contributor to postglacial sea-level rise and Meltwater pulse 1A. © 2014 The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60217
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作者单位: National Institute of Polar Research, 10-3 Midoricho, Tachikawa, Tokyo 190-8518, Japan; Department of Polar Science, School of Multidisciplinary Sciences, The Graduate University for Advanced Studies (SOKENDAI), Midori-cho 10-3, Tachikawa, Tokyo 190-8518, Japan; GNS Science, National Isotope Centre, Lower Hutt 5010, New Zealand; Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 3173-25 Showa-machi, Kanazawa-ku, Yokohama, Kanagawa 236-0001, Japan

Recommended Citation:
Suganuma Y.,Miura H.,Zondervan A.,et al. East Antarctic deglaciation and the link to global cooling during the Quaternary: Evidence from glacial geomorphology and 10Be surface exposure dating of the Sør Rondane Mountains, Dronning Maud Land[J]. Quaternary Science Reviews,2014-01-01,97
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