气候变化领域集成服务门户(CCPortal): Considerable influences of recycled moistures and summer monsoons to local precipitation on the northeastern Tibetan Plateau

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DOI	10.1016/j.jhydrol.2021.127343
	Considerable influences of recycled moistures and summer monsoons to local precipitation on the northeastern Tibetan Plateau
	Guo, Xiaoyan; Feng, Qi; Si, Jianhua; Zhang, Xiaojian
通讯作者	Guo, XY ; Feng, Q (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Lanzhou, Peoples R China.
发表日期	2022
ISSN	0022-1694
EISSN	1879-2707
卷号	605
英文摘要	Located within the transition zone between the monsoon and westerlies circulation system, the northeastern Tibetan Plateau (NETP) is a critical region for understanding the alternative roles of various atmospheric moisture sources in local precipitation and the resultant hydrological divergences. Yet, determination of contributions of the recycled moisture and the summer monsoonal flows to the local precipitation remain ambiguous. In this study, daily time series precipitation isotope data for three consecutive years (2016-2018) at two representative sites (Huangyuan (HY) and Gangcha (GC)) on the NETP were analyzed. The results reveal remarkable seasonal variations in the precipitation isotopes (delta 2H and delta 18O) on the NETP, which were alternatively influenced by local climate conditions and the transitions of moisture sources. Much lower slopes (<8) and intercepts (<10) of the daily-based Local Meteoric Water Lines (LMWLs) at both sites suggested that sub-cloud evaporation of raindrops and monsoonal activities exerted significant influences in local precipitation. Local climatic conditions partially modulated the isotopes of precipitation and during entire study period at HY; however, they exhibited weak impacts on the isotopes of precipitation at GC, indicating different controlling factors and diverse moisture sources between the two sites. Combined the isotopic data and the HYSPLIT model results, we found that the westerly, the recycled moisture, and the summer monsoon circulation alternatively influenced the isotopic composition of precipitation between June and August. The recycled fractions accounted for 0%-11.6% (monthly mean: 5.1%-7.0%) and 0%-20.2% (monthly mean: 3.1%-7.3%) of the monthly precipitation at HY and GC, respectively. Notably, we demonstrated that both the East Asian Summer Monsoon (EASM) and the Indian Summer Monsoon (ISM) reached the NETP and contributed considerable moistures to the local precipitation. As many as 87.0 mm and 62.2 mm of precipitation were generated from monsoonal water vapor in 2016, which accounted for 14.96% and 9.93% of the annual total amounts at HY and GC. These findings provide a better understanding of the interactions between atmospheric water vapor and precipitation and the roles of monsoonal activities in local climates, both of which are beneficial for interpreting paleo-climate reconstruction on the TP.
关键词	STABLE-ISOTOPE VARIATIONS DEUTERIUM EXCESS CLIMATE-CHANGE INDIAN MONSOON WATER QINGHAI DELTA-O-18 TRANSPORT UPSTREAM IMPACTS
英文关键词	Precipitation isotopes; Recycled moisture fraction; Moisture sources; HYSPLIT model; Monsoon incursion; Tibetan Plateau (TP)
语种	英语
WOS研究方向	Engineering ; Geology ; Water Resources
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000752489000001
来源期刊	JOURNAL OF HYDROLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253783
作者单位	[Guo, Xiaoyan; Feng, Qi; Si, Jianhua] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Lanzhou, Peoples R China; [Guo, Xiaoyan; Feng, Qi; Si, Jianhua] Alax Desert Ecohydrol Expt Res Stn, Lanzhou, Peoples R China; [Guo, Xiaoyan; Feng, Qi; Si, Jianhua] Qilian Mt Ecoenvironm Res Ctr Gansu Prov, Lanzhou, Peoples R China; [Zhang, Xiaojian] Nanjing Univ, Sch Geog & Ocean Sci, Nanjing, Peoples R China
推荐引用方式 GB/T 7714	Guo, Xiaoyan,Feng, Qi,Si, Jianhua,et al. Considerable influences of recycled moistures and summer monsoons to local precipitation on the northeastern Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2022,605.
APA	Guo, Xiaoyan,Feng, Qi,Si, Jianhua,&Zhang, Xiaojian.(2022).Considerable influences of recycled moistures and summer monsoons to local precipitation on the northeastern Tibetan Plateau.JOURNAL OF HYDROLOGY,605.
MLA	Guo, Xiaoyan,et al."Considerable influences of recycled moistures and summer monsoons to local precipitation on the northeastern Tibetan Plateau".JOURNAL OF HYDROLOGY 605(2022).