| Controls of precipitation delta O-18 on the northwestern Tibetan Plateau: A case study at Ngari station | |
| Guo, XY (Guo, Xiaoyu)1,3,4; Tian, LD (Tian, Lide)1,2,3,4; Wen, R (Wen, Rong)1; Yu, WS (Yu, Wusheng)1,3; Qu, DM (Qu, Dongmei)1; Tian, LD | |
| Source Publication | ATMOSPHERIC RESEARCH
 |
| 2017 | |
| Volume | 189Issue:0Pages:141-151 |
| DOI | 10.1016/j.atmosres.2017.02.004 |
| Abstract | 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. |
| Subject Area | 自然地理学 |
| WOS ID | WOS:000398007400013 |
| Language | 英语 |
| Indexed By | SCI |
| Keyword | STABLE-ISOTOPE VARIATIONS AMERICAN TELECONNECTION CONTROLS HOLOCENE ENVIRONMENTAL-CHANGES CONTIGUOUS UNITED-STATES ATMOSPHERIC WATER-VAPOR BASIN WESTERN TIBET SUMMER MONSOON ICE-CORE ASIAN MONSOON MOISTURE TRANSPORT |
| WOS Research Area | Meteorology & Atmospheric Sciences |
| WOS Subject | Meteorology & Atmospheric Sciences ; Meteorology & Atmospheric Sciences |
| Cooperation Status | 国内 |
| Subtype | Article |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itpcas.ac.cn/handle/131C11/8237 |
| Collection | 图书馆 |
| Corresponding Author | Tian, LD |
| Affiliation | 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China. 2.Yunnan Univ, Inst Int Rivers & Ecosecur, Kunming 650500, Peoples R China. 3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China. 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China. |
| Recommended Citation GB/T 7714 | Guo, XY ,Tian, LD ,Wen, R ,et al. Controls of precipitation delta O-18 on the northwestern Tibetan Plateau: A case study at Ngari station[J]. ATMOSPHERIC RESEARCH,2017,189(0):141-151. |
| APA | Guo, XY ,Tian, LD ,Wen, R ,Yu, WS ,Qu, DM ,&Tian, LD.(2017).Controls of precipitation delta O-18 on the northwestern Tibetan Plateau: A case study at Ngari station.ATMOSPHERIC RESEARCH,189(0),141-151. |
| MLA | Guo, XY ,et al."Controls of precipitation delta O-18 on the northwestern Tibetan Plateau: A case study at Ngari station".ATMOSPHERIC RESEARCH 189.0(2017):141-151. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| V.189 141-151 2017.p（1755KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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