Universität zu Köln

Stauch, Georg ORCID: 0000-0002-8046-140X, Ijmker, Janneke, Poetsch, Steffen, Zhao, Hui, Hilgers, Alexandra, Diekmann, Bernhard ORCID: 0000-0001-5129-3649, Dietze, Elisabeth ORCID: 0000-0003-4817-8441, Hartmann, Kai ORCID: 0000-0003-2540-6798, Opitz, Stephan ORCID: 0000-0003-0416-542X, Wuennemann, Bernd and Lehmkuhl, Frank ORCID: 0000-0002-6876-7377 (2012). Aeolian sediments on the north-eastern Tibetan Plateau. Quat. Sci. Rev., 57. S. 71 - 85. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 0277-3791

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Abstract

Aeolian sediments on the Tibetan Plateau are an important archive of palaeoclimatic information. This study presents a detailed analysis of sediments from the Donggi Cona catchment on the north-eastern part of the Tibetan Plateau. Long- and short-distance sediment transport leads to a complex pattern of aeolian sediment deposition that depends on climatic changes as well as on the availability of sediments. Based on the largest dataset of OSL datings (51) from a single catchment on the Tibetan Plateau so far, different periods of increased sediment transport have been reconstructed. Increased aeolian deposition in this high elevation environment started in the early Holocene with the accumulation of sands from around 10.5 to 7 ka. Loess sediments have been preserved from a period from 10.5 to 7.5 ka. Both archives are related to the strengthening of the Asian summer monsoons characterized by wetter and warmer climate. This change in climate supported the trapping of aeolian sediments. Under full monsoon conditions from around 9 ka onwards fluvial processes resulted in erosion of the aeolian archives and the formation of colluvial sediments until 6 ka. A dry and cooler climate resulted in the reactivation of dune sands from 3 ka to present, possibly in combination with stronger human influence. Aeolian sediments on the Tibetan Plateau therefore indicate two different climatic modes. During the early Holocene wetter conditions were favourable to retain aeolian sediments. The reactivation of sediment in the late Holocene due to small-scale disturbances in the vegetation cover, points to a cooler and drier climate. (C) 2012 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Stauch, Georg UNSPECIFIED orcid.org/0000-0002-8046-140X UNSPECIFIED Ijmker, Janneke UNSPECIFIED UNSPECIFIED UNSPECIFIED Poetsch, Steffen UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhao, Hui UNSPECIFIED UNSPECIFIED UNSPECIFIED Hilgers, Alexandra UNSPECIFIED UNSPECIFIED UNSPECIFIED Diekmann, Bernhard UNSPECIFIED orcid.org/0000-0001-5129-3649 UNSPECIFIED Dietze, Elisabeth UNSPECIFIED orcid.org/0000-0003-4817-8441 UNSPECIFIED Hartmann, Kai UNSPECIFIED orcid.org/0000-0003-2540-6798 UNSPECIFIED Opitz, Stephan UNSPECIFIED orcid.org/0000-0003-0416-542X UNSPECIFIED Wuennemann, Bernd UNSPECIFIED UNSPECIFIED UNSPECIFIED Lehmkuhl, Frank UNSPECIFIED orcid.org/0000-0002-6876-7377 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-476953
DOI:	10.1016/j.quascirev.2012.10.001
Journal or Publication Title:	Quat. Sci. Rev.
Volume:	57
Page Range:	S. 71 - 85
Date:	2012
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	0277-3791
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CHINESE LOESS PLATEAU; OPTICALLY STIMULATED LUMINESCENCE; LAKE DONGGI CONA; REGENERATIVE-DOSE PROTOCOL; GRAIN-SIZE DISTRIBUTIONS; LAST GLACIAL MAXIMUM; LATE QUATERNARY; PALEOENVIRONMENTAL IMPLICATIONS; KUNLUN FAULT; QINGHAI LAKE Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/47695