气候变化领域集成服务门户(CCPortal): Water Vapor Budget Features and Its Precipitation Effects over the Key Area of Sichuan-Tibet Railway in Summer

CCPortal

DOI	10.3390/w15061071
	Water Vapor Budget Features and Its Precipitation Effects over the Key Area of Sichuan-Tibet Railway in Summer
	Qi, Dongmei; Li, Yueqing; Zhou, Changyan; Chen, Dan; Lai, Xin
发表日期	2023
EISSN	2073-4441
卷号	15 期号:6
英文摘要	In this study, we investigate the variation of characteristics of summer precipitation with different magnitudes and the water vapor budget in different key areas of the Sichuan-Tibet Railway by using the daily precipitation data from meteorological stations and the monthly mean ERA-Interim reanalysis data from 1979 to 2018. The results show that the summer heavy precipitation anomaly in the Brahmaputra valley and mountain (BVM) area is generated by the multi-scale interactions between the unique topography and different water vapor transports at low latitudes. When an intense anticyclonic circulation occurs over the western Pacific and the South China Sea, there is also an anomalous anticyclonic circulation extending from the northern Indian Peninsula to the Bay of Bengal. This circulation pattern is conductive to the increase of the water vapor inflow from the southern boundary and the net water vapor budget in the BVM area. The strong southwesterly wind and water vapor convergence over this area thus leading to heavy precipitation in the summer. The summer heavy precipitation amount, frequency and intensity in the western parts of the steep terrain (ST) area on the east slope of the plateau are positively correlated with the water vapor inflow from its western boundary. However, the correlations of the water vapor budget to the summer heavy precipitation amount and frequency are opposite in the eastern parts of the ST area. The unique terrain and circulation patterns lead to the localization and diversity of heavy precipitation in the ST area.
关键词	key area of Sichuan-Tibet railway summer heavy precipitation water vapor budget unique terrain circulation anomaly
英文关键词	MOISTURE SOURCE; PLATEAU; RAINFALL; TRENDS
WOS研究方向	Environmental Sciences ; Water Resources
WOS记录号	WOS:000958442500001
来源期刊	WATER
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282901
作者单位	China Meteorological Administration
推荐引用方式 GB/T 7714	Qi, Dongmei,Li, Yueqing,Zhou, Changyan,et al. Water Vapor Budget Features and Its Precipitation Effects over the Key Area of Sichuan-Tibet Railway in Summer[J],2023,15(6).
APA	Qi, Dongmei,Li, Yueqing,Zhou, Changyan,Chen, Dan,&Lai, Xin.(2023).Water Vapor Budget Features and Its Precipitation Effects over the Key Area of Sichuan-Tibet Railway in Summer.WATER,15(6).
MLA	Qi, Dongmei,et al."Water Vapor Budget Features and Its Precipitation Effects over the Key Area of Sichuan-Tibet Railway in Summer".WATER 15.6(2023).