Universität zu Köln

Berg, Sonja ORCID: 0000-0002-9629-6007, Wagner, Bernd ORCID: 0000-0002-1369-7893, Cremer, Holger, Leng, Melanie J. and Melles, Martin ORCID: 0000-0003-0977-9463 (2010). Late Quaternary environmental and climate history of Rauer Group, East Antarctica. Paleogeogr. Paleoclimatol. Paleoecol., 297 (1). S. 201 - 214. AMSTERDAM: ELSEVIER. ISSN 1872-616X

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Abstract

The Rauer Group is an archipelago in Prydz Bay, East Antarctica. The ice-free islands and the surrounding shallow marine areas provide valuable archives for the reconstruction of the late Pleistocene and Holocene environmental and climatic history of the region. Two sediment records from two marine inlets of Rauer Group have been studied for their sedimentological, geochemical, and biological characteristics. Radiocarbon ages from one of the inlets indicate ice-free conditions within the last glacial cycle, probably during the second half of Marine Isotope Stage 3. Subsequent ice sheet coverage of Rauer Group during the Last Glacial Maxiumum (LGM) can be inferred from a till layer recovered in one of the basins. The inlets became ice-free prior to 11,200 cal yr BP, when biogenic sedimentation started. Deglacial processes in the catchments, however, influenced the inlets until similar to 9200 cal yr BP as evidenced by the input of minerogenic material. Marine productivity under relatively open water conditions indicates an early Holocene climate optimum until 8200 cal yr BP, which is followed by a cooler period with increased sea ice. Warmer conditions are inferred for the mid Holocene, when both basins experienced an input of freshwater between similar to 5700-3500 cal yr BP, probably due to ice-sheet melting and increased precipitation on the islands. Neoglacial cooling in the late Holocene since c. 3500 cal yr BP is reflected by an increase in sea ice in both inlets. (C) 2010 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Berg, Sonja UNSPECIFIED orcid.org/0000-0002-9629-6007 UNSPECIFIED Wagner, Bernd UNSPECIFIED orcid.org/0000-0002-1369-7893 UNSPECIFIED Cremer, Holger UNSPECIFIED UNSPECIFIED UNSPECIFIED Leng, Melanie J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Melles, Martin UNSPECIFIED orcid.org/0000-0003-0977-9463 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-493878
DOI:	10.1016/j.palaeo.2010.08.002
Journal or Publication Title:	Paleogeogr. Paleoclimatol. Paleoecol.
Volume:	297
Number:	1
Page Range:	S. 201 - 214
Date:	2010
Publisher:	ELSEVIER
Place of Publication:	AMSTERDAM
ISSN:	1872-616X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SEA-LEVEL HISTORY; VESTFOLD HILLS; PRYDZ BAY; DIATOM ASSEMBLAGES; WINDMILL ISLANDS; ADELIE LAND; ICE-SHEET; SURFACE SEDIMENTS; HOLOCENE GLACIER; LATE PLEISTOCENE Multiple languages Geography, Physical; Geosciences, Multidisciplinary; Paleontology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/49387