globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2017.03.010
Scopus记录号: 2-s2.0-85015702597
论文题名:
Sub-Antarctic glacier extensions in the Kerguelen region (49°S, Indian Ocean) over the past 24,000 years constrained by 36Cl moraine dating
作者: Jomelli V.; Mokadem F.; Schimmelpfennig I.; Chapron E.; Rinterknecht V.; Favier V.; Verfaillie D.; Brunstein D.; Legentil C.; Michel E.; Swingedouw D.; Jaouen A.; Aumaitre G.; Bourlès D.L.; Keddadouche K.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 162
起始页码: 128
结束页码: 144
语种: 英语
英文关键词: 36Cl cosmic-ray exposure dating ; Glacier fluctuations ; Holocene ; Kerguelen ; Late Glacial
Scopus关键词: Climate change ; Cosmic rays ; Cosmology ; Glacial geology ; Snow ; <sup>36</sup>Cl cosmic-ray exposure dating ; Glacier fluctuations ; Holocenes ; Kerguelen ; Late Glacial ; Ice
英文摘要: Similar to many other regions in the world, glaciers in the southern sub-polar regions are currently retreating. In the Kerguelen Islands (49°S, 69°E), the mass balance of the Cook Ice Cap (CIC), the largest ice cap in this region, experienced dramatic shrinking between 1960 and 2013 with retreat rates among the highest in the world. This observation needs to be evaluated in a long-term context. However, data on the past glacier extents are sparse in the sub-Antarctic regions. To investigate the deglaciation pattern since the Last Glacial Maximum (LGM) period, we present the first 13 cosmogenic 36Cl surface exposure ages from four sites in the Kerguelen Islands. The 36Cl ages from erratic and moraine boulders span from 24.4 ± 2.7 ka to 0.3 ± 0.1 ka. We combined these ages with existing glacio-marine radiocarbon ages and bathymetric data to document the temporal and spatial changes of the island's glacial history. Ice began to retreat on the main island before 24.4 ± 2.7 ka until around the time of the Antarctic Cold Reversal (ACR) period (∼14.5–12.9 ka), during which the Bontemps moraine was formed by the advance of a CIC outlet glacier. Deglaciation continued during the Holocene probably until 3 ka with evidence of minor advances during the last millennium. This chronology is in pace with major changes in δ18O in a recent West Antarctica ice core record, showing that Kerguelen Islands glaciers are particularly sensitive and relevant to document climate change in the southern polar regions. © 2017 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59265
Appears in Collections:过去全球变化的重建

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作者单位: Université Paris 1 Panthéon-Sorbonne, CNRS Laboratoire de Géographie Physique, Meudon, France; Aix Marseille Univ, CNRS, IRD, Coll France, CEREGE, Aix-en-Provence, France; Institut des Sciences de la Terre d'Orléans, ISTO, UMR 7327 CNRS-Université d'Orléans-BRGM, Campus Géosciences 1A rue de la Ferolerie, Cedex 2, Orléans, France; Géographie de l'Environnement, GEODE UMR 5602 CNRS Université Toulouse Jean Jaurès, 5 Allée A. Machado, Cedex 9, Toulouse, France; Univ. Grenoble Alpes, LGGE, CNRS, Grenoble, France; LSCE, Saclay, Gif sur Yvette, France; UMR CNRS 5805 EPOC – OASU – Université de Bordeaux, Allée Geoffroy St Hilaire, Pessac, France; Institut Polaire Français Paul-Emile Victor, Plouzané, France; ASTER Team, France

Recommended Citation:
Jomelli V.,Mokadem F.,Schimmelpfennig I.,et al. Sub-Antarctic glacier extensions in the Kerguelen region (49°S, Indian Ocean) over the past 24,000 years constrained by 36Cl moraine dating[J]. Quaternary Science Reviews,2017-01-01,162
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