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Spatial distribution of atmospheric water vapor and its relationship with precipitation in summer over the Tibetan Plateau

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文摘 By using the observed monthly mean temperature and humidity datasets of 14 ra- diosonde stations and monthly mean precipitation data of 83 surface stations from 1979 to 2008 over the Tibetan Plateau (TP), the relationship between the atmospheric water vapor (WV) and precipitation in summer and the precipitation conversion efficiency (PEC) over the TP are analyzed. The results are obtained as follows. (1) The summer WV decreases with increasing altitude, with the largest value area observed in the northeastern part of the TP, and the second largest value area in the southeastern part of the TP, while the northwestern part is the lowest value area. The summer precipitation decreases from southeast to north- west. (2) The summer WV presents two main patterns based on the EOF analysis: the whole region consistent-type and the north-south opposite-type. The north-south opposite-type of the summer WV is similar to the first EOF mode of the summer precipitation and both of their zero lines are located to the north of the Tanggula Mountains. (3) The summer precipitation is more (less) in the southern (northern) TP in the years with the distribution of deficient summer WV in the north while abundant in the south, and vice versa. (4) The PEC over the TP is between 3% and 38% and it has significant spatial difference in summer, which is obviously bigger in the southern TP than that in the northern TP.
来源 Journal of Geographical Sciences ,2012,22(5):795-809 【核心库】
DOI 10.1007/s11442-012-0964-8
关键词 the Tibetan Plateau ; water vapor content ; precipitation ; precipitation conversion efficiency
地址

College of Atmospheric Sciences, Nanjing University of Information Science & Technology, Nanjing, 210044

语种 英文
ISSN 1009-637X
学科 大气科学(气象学)
基金 国家973计划 ;  R&D Research Development Program of China Special Fund for Public Welfare Industry (Meteorology) ;  Open Lab fundation of Institute of Plateau Meteorology, CMA, Chengdu
文献收藏号 CSCD:4695614

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引证文献 15 篇

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