气候变化领域集成服务门户(CCPortal): The Mechanism of Increasing Summer Water Vapor Over the Tibetan Plateau

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DOI	10.1029/2020JD034166
	The Mechanism of Increasing Summer Water Vapor Over the Tibetan Plateau
	He Y.; Tian W.; Huang J.; Wang G.; Ren Y.; Yan H.; Yu H.; Guan X.; Hu H.
发表日期	2021
ISSN	2169897X
卷号	126 期号:10
英文摘要	Rapid warming over the Tibetan Plateau (TP) has been associated with an increasing trend in atmospheric water vapor content, which is critical for recharging the Asian water tower. However, the mechanism associated with the wetting phenomenon remains unclear. Long-term changes in moisture balance and precipitation (PRE) recycling processes are investigated using the ERA5 reanalysis from 1979 to 2019. The increasing trend over TP is mainly due to the summer water vapor trend with signiﬁcantly increases over the western TP. Based on the moisture balance analysis, it is found that PRE, evaporation, and the convergence of moisture are all increasing over the western TP but decreasing over the eastern TP. Based on the dynamical PRE recycling model, the results suggest that both internal and external cycles contributes to the wetting over TP, with 63.87% and 36.13% contributions respectively. Further analysis found that the atmospheric heating source is also increasing over the western TP, which could shift the moisture transportation from east to west at the southern boundary of TP. The increasing moisture convergence could enhance PRE, and the enhanced latent heating in the mid-atmosphere can further induced moisture convergence, which forms a positive feedback. However, an opposite situation occurred over the eastern TP. The internal and external cycle of the water cycle can stimulate (suppress) each other through PRE over the western (eastern) TP. This mechanism linked the changes in the PRE recycling and atmospheric circulation, and induced the increasing trend over TP in summer. © 2021. American Geophysical Union. All Rights Reserved.
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
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/185271
作者单位	Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou, Gansu, China; Collaborative Innovation Center for Western Ecological Safety, Lanzhou, China; Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu, China; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, United States
推荐引用方式 GB/T 7714	He Y.,Tian W.,Huang J.,et al. The Mechanism of Increasing Summer Water Vapor Over the Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2021,126(10).
APA	He Y..,Tian W..,Huang J..,Wang G..,Ren Y..,...&Hu H..(2021).The Mechanism of Increasing Summer Water Vapor Over the Tibetan Plateau.Journal of Geophysical Research: Atmospheres,126(10).
MLA	He Y.,et al."The Mechanism of Increasing Summer Water Vapor Over the Tibetan Plateau".Journal of Geophysical Research: Atmospheres 126.10(2021).