气候变化领域集成服务门户(CCPortal): Stable isotopic variations in west China: A consideration of moisture sources

CCPortal

DOI	10.1029/2006JD007718
	Stable isotopic variations in west China: A consideration of moisture sources
	Tian, Lide; Yao, Tandong; MacClune, K.; White, J. W. C.; Schilla, A.; Vaughn, B.; Vachon, R.; Ichiyanagi, K.
发表日期	2007
ISSN	2169-897X
EISSN	2169-8996
卷号	112 期号:D10
英文摘要	[1] In this study, individual precipitation samples, collected over 2 years at stations in different climatic regions of west China (Tibetan Plateau region, Tianshan region, and Altay) were analyzed for the stable isotopes of precipitation to improve our understanding of how vapor transport impacts the modern stable isotopic distribution. Our results identify regional patterns in both delta O-18 and deuterium excess (D excess, defined as delta D - 8 delta O-18), and in particular we have identified the northward maximum extent of the southwest monsoon over the Tibetan Plateau. This demarcation is also the boundary for the fractionation effect of temperature on stable isotopes in precipitation. The patterns we have identified are as follows: (1) In the southern Tibetan Plateau, along the southern slope of the Himalayas, our results show a distinct seasonality for both delta O-18 and D excess as a result of the shift of summer monsoon moisture and winter westerly moisture transport. The signals of delta O-18 in the western Tibetan Plateau reveal that the region receives southwest monsoonal moisture. In the east of the plateau, stable isotopic variation shows alternation between monsoon intrusion and recycling of northern moisture. (2) In contrast, in Tianshan there is an apparent temperature effect'' in delta O-18, with enriched values occurring in summer and depleted values occurring in winter. Seasonal D excess values, opposite to those observed in the southern Tibetan Plateau, are controlled by differing seasonal evaporation conditions. (3) In Altay, the most northern mountain region, the seasonal delta O-18 shows the same variation with that in Tianshan region. However, D excess shows no apparent seasonal variation.
关键词	ICE-CORE MEDITERRANEAN-SEA DEUTERIUM EXCESS TIBETAN PLATEAU PRECIPITATION CLIMATE SNOW RECORD WATER O-18
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000246846400002
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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/426
推荐引用方式 GB/T 7714	Tian, Lide,Yao, Tandong,MacClune, K.,et al. Stable isotopic variations in west China: A consideration of moisture sources[J]. 中国科学院青藏高原研究所,2007,112(D10).
APA	Tian, Lide.,Yao, Tandong.,MacClune, K..,White, J. W. C..,Schilla, A..,...&Ichiyanagi, K..(2007).Stable isotopic variations in west China: A consideration of moisture sources.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,112(D10).
MLA	Tian, Lide,et al."Stable isotopic variations in west China: A consideration of moisture sources".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 112.D10(2007).