气候变化领域集成服务门户(CCPortal): Response of delta D values of sedimentary n-alkanes to variations in source water isotope signals and climate proxies at lake Nam Co, Tibetan Plateau

CCPortal

DOI	10.1016/j.quaint.2010.12.006
	Response of delta D values of sedimentary n-alkanes to variations in source water isotope signals and climate proxies at lake Nam Co, Tibetan Plateau
	Guenther, F.; Muegler, I.; Maeusbacher, R.; Daut, G.; Leopold, K.; Gerstmann, U. C.; Xu, B.; Yao, T.; Gleixner, G.
通讯作者	Gleixner, G (通讯作者)
发表日期	2011
ISSN	1040-6182
EISSN	1873-4553
起始页码	82
结束页码	90
卷号	236
英文摘要	Compound-specific delta D values of sedimentary n-alkanes from Nam Co were compared with oxygen isotope values from three different ice cores of the Tibetan Plateau and other climate proxies including temperature and solar radiation. This enabled estimation of the importance of source water and of environmental factors at the ecosystem scale on variations of the isotopic composition of sedimentary n-alkanes. The ice core records from Dasuopu, Puruogangri and Rongbuk glacier of the past 1000 years recording the source water isotopes show a continuous deuterium enrichment indicating a warming trend or decreased precipitation. Sedimentary n-alkane delta D values also represent the same general tendency to enrichment in heavier isotopes. However, the correlation to the delta O-18 values derived from the ice record is very weak. The delta D values of n-alkanes agree with known climatic events such as the Little Ice Age and Medieval Warm Period showing depleted and enriched delta D values, respectively. The delta D values of the n-alkanes were best related to environmental drivers including temperature and solar radiation. The results suggest that delta D values of sedimentary n-alkanes mainly record evapotranspiration and relative humidity that strongly influence delta D values at the plant level, while variability of the source signal is less important. (C) 2010 Elsevier Ltd and INQUA. All rights reserved.
关键词	ORGANIC GEOCHEMISTRY LIPID BIOMARKERS SUMMER MONSOON PRECIPITATION RATIOS TEMPERATURE RECORD VARIABILITY PREFERENCE PLANTS
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000290511100010
来源期刊	QUATERNARY INTERNATIONAL
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257943
推荐引用方式 GB/T 7714	Guenther, F.,Muegler, I.,Maeusbacher, R.,et al. Response of delta D values of sedimentary n-alkanes to variations in source water isotope signals and climate proxies at lake Nam Co, Tibetan Plateau[J]. 中国科学院青藏高原研究所,2011,236.
APA	Guenther, F..,Muegler, I..,Maeusbacher, R..,Daut, G..,Leopold, K..,...&Gleixner, G..(2011).Response of delta D values of sedimentary n-alkanes to variations in source water isotope signals and climate proxies at lake Nam Co, Tibetan Plateau.QUATERNARY INTERNATIONAL,236.
MLA	Guenther, F.,et al."Response of delta D values of sedimentary n-alkanes to variations in source water isotope signals and climate proxies at lake Nam Co, Tibetan Plateau".QUATERNARY INTERNATIONAL 236(2011).