气候变化领域集成服务门户(CCPortal): Controls of precipitation delta O-18 on the northwestern Tibetan Plateau: A case study at Ngari station

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DOI	10.1016/j.atmosres.2017.02.004
	Controls of precipitation delta O-18 on the northwestern Tibetan Plateau: A case study at Ngari station
	Guo, Xiaoyu; Tian, Lide; Wen, Rong; Yu, Wusheng; Qu, Dongmei
通讯作者	Tian, LD (通讯作者)
发表日期	2017
ISSN	0169-8095
EISSN	1873-2895
起始页码	141
结束页码	151
卷号	189
英文摘要	The shifting atmospheric circulation between the Indian monsoon and the westerlies on the northwestern Tibetan Plateau (TP) influences precipitation as well as precipitation isotopes. Isotopic records will therefore show historical fluctuations. To understand better the factors controlling present day precipitation delta O-18 values on the northwestern TP, we made continuous observations of precipitation isotopes at Ngari station from 2010 to 2013. The drivers of precipitation delta O-18 were investigated using analyses of their statistical relations with temperature, precipitation amount, relative humidity, and convective activities based on outgoing longwave radiation (OLR) data from NOAA satellites, and downward shortwave radiation (DSR) data collected at the Ngari automatic weather station. Atmospheric circulation patterns from NCAR reanalysis, and moisture transport paths of individual events derived from the HYSPLIT model using NCEP data, were also used to trace moisture sources. The results of our study include: (1) The slope and intercept of the Local Meteoric Water Line (LMWL) at Ngari (delta D = 8.51 delta O-18 + 11.57 (R-2 = 0.97, p < 0.01)) were higher than for the Global Meteoric Water Line (GMWL), indicating drier local climatic conditions; (2) Precipitation delta O-18 values showed a weak temperature effect and a weak precipitation amount effect at Ngari; and (3) Convection (or temperature patterns) integrated over several days (0-20) preceding each event were determined to be the main driver of precipitation isotopic values in monsoon (or non-monsoon) season. The longer (shorter) periods of tau(m) days when correlation coefficients between precipitation delta O-18 and OLR were at their maxima (minima) indicate deep convective activities (shorter moisture transportation pathways) in August (June, July, and September). (C) 2017 Elsevier B.V. All rights reserved.
关键词	STABLE-ISOTOPE VARIATIONS AMERICAN TELECONNECTION CONTROLS HOLOCENE ENVIRONMENTAL-CHANGES ATMOSPHERIC WATER-VAPOR BASIN WESTERN TIBET SUMMER MONSOON ASIAN MONSOON ICE-CORE MOISTURE TRANSPORT BANGONG CO
英文关键词	Northwestern Tibetan Plateau; Precipitation delta O-18; Convection; OLR; Moisture source
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000398007400013
来源期刊	ATMOSPHERIC RESEARCH
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/258999
推荐引用方式 GB/T 7714	Guo, Xiaoyu,Tian, Lide,Wen, Rong,et al. Controls of precipitation delta O-18 on the northwestern Tibetan Plateau: A case study at Ngari station[J]. 中国科学院青藏高原研究所,2017,189.
APA	Guo, Xiaoyu,Tian, Lide,Wen, Rong,Yu, Wusheng,&Qu, Dongmei.(2017).Controls of precipitation delta O-18 on the northwestern Tibetan Plateau: A case study at Ngari station.ATMOSPHERIC RESEARCH,189.
MLA	Guo, Xiaoyu,et al."Controls of precipitation delta O-18 on the northwestern Tibetan Plateau: A case study at Ngari station".ATMOSPHERIC RESEARCH 189(2017).