Universität zu Köln

Aichner, Bernhard ORCID: 0000-0002-2471-7466, Gierga, Merle, Stolz, Alexander, Metrak, Monika ORCID: 0000-0002-6069-6041, Wilk, Mateusz, Suska-Malawska, Malgorzata ORCID: 0000-0002-5400-9508, Mischke, Steffen ORCID: 0000-0003-3821-8497, Sachse, Dirk, Rajabov, Ilhomjon, Rajabov, Nasimjon and Rethemeyer, Janet (2021). DO RADIOCARBON AGES OF PLANT WAX BIOMARKERS AGREE WITH C-14-TOC/OSL-BASED AGE MODELS IN AN ARID HIGH-ALTITUDE LAKE SYSTEM? Radiocarbon, 63 (6). S. 1575 - 1591. NEW YORK: CAMBRIDGE UNIV PRESS. ISSN 1945-5755

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Abstract

To elucidate the dynamics of terrestrial leaf waxes in a high-altitude lake system, we performed compound-specific radiocarbon analysis (CSRA) of long-chain n-alkanes in two sediment core sections from Lake Karakul (Pamirs, Tajikistan) and in surface soil samples from the catchment area. We aimed to answer the question whether the n-alkanes are delivered into the lake sediment with substantial delay due to storage in soils, which may cause a potential bias when used as paleoenvironmental proxies. In the surface soils, the CSRA results reveal an age range of n-alkanes from modern to 2278 +/- 155 cal BP. In the two sediment core samples, three of the four n-alkane ages fell on the lower ends of the 1 sigma-uncertainty ranges of modeled ages of the sediments (based on AMS C-14-TOC and OSL dating results). We conclude that sedimentary leaf waxes represent compounds with intermediate turnover time in soils, for example originating from alluvial plains close to the shores. Overall, the results provide evidence that sedimentary leaf wax compounds in this cold and arid setting are potentially older than the conventional age model indicates, but these findings need to be interpreted in context of the generally large uncertainty ranges of such age models.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Aichner, Bernhard UNSPECIFIED orcid.org/0000-0002-2471-7466 UNSPECIFIED Gierga, Merle UNSPECIFIED UNSPECIFIED UNSPECIFIED Stolz, Alexander UNSPECIFIED UNSPECIFIED UNSPECIFIED Metrak, Monika UNSPECIFIED orcid.org/0000-0002-6069-6041 UNSPECIFIED Wilk, Mateusz UNSPECIFIED UNSPECIFIED UNSPECIFIED Suska-Malawska, Malgorzata UNSPECIFIED orcid.org/0000-0002-5400-9508 UNSPECIFIED Mischke, Steffen UNSPECIFIED orcid.org/0000-0003-3821-8497 UNSPECIFIED Sachse, Dirk UNSPECIFIED UNSPECIFIED UNSPECIFIED Rajabov, Ilhomjon UNSPECIFIED UNSPECIFIED UNSPECIFIED Rajabov, Nasimjon UNSPECIFIED UNSPECIFIED UNSPECIFIED Rethemeyer, Janet UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-593251
DOI:	10.1017/RDC.2021.78
Journal or Publication Title:	Radiocarbon
Volume:	63
Number:	6
Page Range:	S. 1575 - 1591
Date:	2021
Publisher:	CAMBRIDGE UNIV PRESS
Place of Publication:	NEW YORK
ISSN:	1945-5755
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language OPTICALLY STIMULATED LUMINESCENCE; COMPOUND-SPECIFIC DELTA-C-14; BASIN SURFACE SEDIMENT; EASTERN PAMIRS; N-ALKANES; ORGANIC-COMPOUNDS; CARBON; KARAKUL; TAJIKISTAN; RECORDS Multiple languages Geochemistry & Geophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/59325