气候变化领域集成服务门户(CCPortal): Controls of stable isotopes in precipitation on the central Tibetan Plateau: A seasonal perspective

CCPortal

DOI	10.1016/j.quaint.2019.03.031
	Controls of stable isotopes in precipitation on the central Tibetan Plateau: A seasonal perspective
	Zhang, Teng; Zhang, Yinsheng; Gun, Yanhong; Ma, Ning; Dai, Di; Song, Hongtao; Qu, Dongmei; Gao, Haifeng
通讯作者	Zhang, YS (通讯作者)
发表日期	2019
ISSN	1040-6182
EISSN	1873-4553
起始页码	66
结束页码	79
卷号	513
英文摘要	Determining the temporal controls on stable isotopes in precipitation is essential for the paleoclimate reconstruction and hydrological regimes in the Tibetan Plateau (TP). Although related studies have been conducted throughout most of the TP, conclusions for the central TP remain unclear. Therefore, in this study, we evaluated the climatic controls on precipitation isotopes on a seasonal basis using a 3-year (January 2014 to December 2016) dataset of daily precipitation isotopes from Xainza station in the Siling Co Basin of the central TP. Results showed that the precipitation delta O-18 displayed a distinct seasonal variation, with enriched values occurring in the pre-monsoon season and relatively depleted values in the monsoon season. Significant positive correlations between precipitation delta O-18 and temperature have been observed during the pre-monsoon and westerly seasons with short-distance moisture trajectories with a large percentage. In comparison, during the monsoon season, the strongest control was provided by integrated regional convections that occurred over several previous days (0-20 days). The increased transport distances extending to the humid ocean with enhanced upstream convections along the trajectory lead to more depleted isotopic values and thus the weakening of convections may be responsible for the increase of delta O-18 values during the post-monsoon season. Additionally, the comparison of d-excess values with other stations in the TP demonstrated the ever-present significant influence of continental moisture throughout the year. A slighter decrease in d-excess values during the monsoon season retained more signals of moisture evaporated from the continent and thus may lead us into more consideration of local recycles. These results indicated that the effects of different moisture sources, including the Indian monsoon and convections, should be considered when interpreting delta O-1(8) from the climate proxies and tracing the water cycles on the central TP.
关键词	ASIAN SUMMER MONSOON OXYGEN-ISOTOPE WATER-VAPOR NAM CO DELTA-O-18 RECORDS MOISTURE TRANSPORT DEUTERIUM EXCESS TERM CHANGES HEIHE RIVER ICE-CORE
英文关键词	Central Tibetan Plateau; Precipitation delta O-18; Regional convection; Moisture source; d-excess
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000469328000008
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/259438
推荐引用方式 GB/T 7714	Zhang, Teng,Zhang, Yinsheng,Gun, Yanhong,et al. Controls of stable isotopes in precipitation on the central Tibetan Plateau: A seasonal perspective[J]. 中国科学院青藏高原研究所,2019,513.
APA	Zhang, Teng.,Zhang, Yinsheng.,Gun, Yanhong.,Ma, Ning.,Dai, Di.,...&Gao, Haifeng.(2019).Controls of stable isotopes in precipitation on the central Tibetan Plateau: A seasonal perspective.QUATERNARY INTERNATIONAL,513.
MLA	Zhang, Teng,et al."Controls of stable isotopes in precipitation on the central Tibetan Plateau: A seasonal perspective".QUATERNARY INTERNATIONAL 513(2019).