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DOI	10.1016/j.epsl.2019.115837
	Indian monsoon precipitation isotopes linked with high level cloud cover at local and regional scales
	Wang, Di; Tian, Lide; Cai, Zhongyin; Shao, Lili; Guo, Xiaoyu; Tian, Ran; Li, Yike; Chen, Yiliang; Yuan, Chuan
通讯作者	Tian, LD (通讯作者)
发表日期	2020
ISSN	0012-821X
EISSN	1385-013X
卷号	529
英文摘要	Precipitation stable isotopes preserve historic changes of evaporation in the source regions and precipitation processes, therefore, they can be used to reveal regional hydrological cycle dynamics and paleoclimate reconstructions. In monsoon regions, strong inverse impacts of convection on precipitation isotope ratios, have created a debate regarding the interpretation of isotope records as local climate proxies. The proportions of stratiform to convective precipitation on water isotopes, together with the influence mechanisms on seasonal and interannual scales remain highly uncertain. To further address the influence of precipitation patterns on water isotopes, we used 10 yrs of precipitation isotope data from the southern Tibetan Plateau (TP) to explore the effects of large-scale cloud cover and local climate on precipitation isotopes. Correlation analysis performed between local precipitation delta O-18 values and different level cloud data, indicated significant negative correlations between precipitation isotopes and high level cloud cover on both seasonal and interannual time scales. This result suggests that high-level convection in the upper moisture transport stream is a main control on precipitation isotopes in the southern TP. The clear and coherent variations of precipitation isotopes with the Southern Oscillation Index and outgoing longwave radiation confirmed that strong convection activity in the moisture source region and during transport significantly depleted heavy isotopes in vapor, producing substantially decreased precipitation delta O-18 in the study region. These results agree with earlier findings of tree ring cellulose isotope records that correlate with cloud cover, but we emphasized the important role of larger-scale regional cloud cover. We also delineated different maximum correlation zones for seasonal and interannual time scales, likely due to different mechanisms. These findings further improve the interpretation of paleoisotope records from the Indian summer monsoon region. (C) 2019 Elsevier B.V. All rights reserved.
关键词	TIBETAN PLATEAU STABLE-ISOTOPES ASIAN MONSOON INTERANNUAL VARIATIONS ICE CORES VARIABILITY DELTA-O-18 PATTERNS OXYGEN SYSTEM
英文关键词	precipitation isotopes; cloud cover; convective activity; regional scale; southern Tibetan Plateau
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000496039600001
来源期刊	EARTH AND PLANETARY SCIENCE LETTERS
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/259817
推荐引用方式 GB/T 7714	Wang, Di,Tian, Lide,Cai, Zhongyin,et al. Indian monsoon precipitation isotopes linked with high level cloud cover at local and regional scales[J]. 中国科学院青藏高原研究所,2020,529.
APA	Wang, Di.,Tian, Lide.,Cai, Zhongyin.,Shao, Lili.,Guo, Xiaoyu.,...&Yuan, Chuan.(2020).Indian monsoon precipitation isotopes linked with high level cloud cover at local and regional scales.EARTH AND PLANETARY SCIENCE LETTERS,529.
MLA	Wang, Di,et al."Indian monsoon precipitation isotopes linked with high level cloud cover at local and regional scales".EARTH AND PLANETARY SCIENCE LETTERS 529(2020).