干旱区生态环境知识资源中心(Arid): Stable isotopes of atmospheric water vapour and precipitation in the northeast Qinghai-Tibetan Plateau

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DOI	10.1002/hyp.13541
	Stable isotopes of atmospheric water vapour and precipitation in the northeast Qinghai-Tibetan Plateau
	Wu, Huawu 1,2; Li, Xiao-Yan 3; Zhang, Jianming 4; Li, Jing 5; Liu, Jinzhao 6; Tian, Lihui 2; Fu, Congsheng 1
通讯作者	Wu, Huawu ; Fu, Congsheng
来源期刊	HYDROLOGICAL PROCESSES
ISSN	0885-6087
EISSN	1099-1085
出版年	2019
卷号	33 期号:23 页码:2997-3009
英文摘要	Stable water isotopes (delta O-18 and delta H-2) are an important source signature for understanding the hydrological cycle and altered climate regimes. However, the mechanisms underlying atmospheric water vapour isotopes in the northeast Qinghai-Tibetan Plateau of central Asia remain poorly understood. This study initially investigated water vapour isotopic composition and its controls during the premonsoon and monsoon seasons. Isotopic compositions of water vapour and precipitation exhibited high variability across seasons, with the most negative average delta O-18 values of precipitation and the most positive delta O-18 values of water vapour found during the premonsoon periods. Temperature effect was significant during the premonsoon period but not the monsoon period. Both a higher slope and intercept of the local meteoric water line were found during the monsoon period as compared with in the premonsoon period, suggesting that raindrops have been experienced a greater kinetic fractionation process such as reevaporation below the cloud during the premonsoon periods. The delta H-2 and delta O-18 signatures in atmospheric water vapour tended to be depleted with the occurrence of precipitation events especially during the monsoon period and probably as a result of rainout processes. The monthly average contribution of evaporation from the lake to local precipitation was 35.2%. High d-excess values of water vapour were influenced by the high proportion of local moisture mixing, as indicated by the gradually increasing relative humidity along westerly and Asian monsoon trajectories. The daily observation (observed epsilon) showed deviations from the equilibrium fractionation factors (calculated epsilon), implying that raindrops experienced substantial evaporative enrichment during their descent. The average fraction of raindrops reevaporation was estimated to be 16.4 +/- 12.9%. These findings provide useful insights for understanding the interaction between water vapour and precipitation, moisture sources, and help in reconstructing the paleoclimate in the alpine regions.
英文关键词	back trajectory isotopes Qinghai Lake watershed reevaporation Tibetan Plateau water vapour
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000484804800001
WOS关键词	ARID CENTRAL-ASIA ; DEUTERIUM EXCESS ; ALPINE ECOSYSTEMS ; CLOUD EVAPORATION ; HYDROGEN ISOTOPES ; MOISTURE ; OXYGEN ; BALANCE ; O-18 ; EVAPOTRANSPIRATION
WOS类目	Water Resources
WOS研究方向	Water Resources
来源机构	北京师范大学 ; 中国科学院地球环境研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216193
作者单位	1.Chinese Acad Sci, Nanjing Inst Geog & Limnol, Key Lab Watershed Geog Sci, Nanjing 210008, Jiangsu, Peoples R China; 2.Qinghai Univ, State Key Lab Plateau Ecol & Agr, Xining, Qinghai, Peoples R China; 3.Beijing Normal Univ, Fac Geog Sci, Coll Resources Sci & Technol, Beijing, Peoples R China; 4.Hunan Climate Ctr, Changsha, Hunan, Peoples R China; 5.Jiujiang Coll, Tourism Sch, Jiujiang, Peoples R China; 6.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Wu, Huawu,Li, Xiao-Yan,Zhang, Jianming,et al. Stable isotopes of atmospheric water vapour and precipitation in the northeast Qinghai-Tibetan Plateau[J]. 北京师范大学, 中国科学院地球环境研究所,2019,33(23):2997-3009.
APA	Wu, Huawu.,Li, Xiao-Yan.,Zhang, Jianming.,Li, Jing.,Liu, Jinzhao.,...&Fu, Congsheng.(2019).Stable isotopes of atmospheric water vapour and precipitation in the northeast Qinghai-Tibetan Plateau.HYDROLOGICAL PROCESSES,33(23),2997-3009.
MLA	Wu, Huawu,et al."Stable isotopes of atmospheric water vapour and precipitation in the northeast Qinghai-Tibetan Plateau".HYDROLOGICAL PROCESSES 33.23(2019):2997-3009.