DOI: 10.1002/joc.5895
Scopus记录号: 2-s2.0-85056260592
论文题名: Synoptic patterns and sounding-derived parameters associated with summertime heavy rainfall in Beijing
作者: Yan Y. ; Miao Y. ; Guo J. ; Liu S. ; Liu H. ; Lou M. ; Liu L. ; Chen D. ; Xue W. ; Zhai P.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2019
卷: 39, 期: 3 起始页码: 1476
结束页码: 1489
语种: 英语
英文关键词: heavy rainfall
; inverted V sounding
; loaded gun sounding
; synoptic pattern
; thin tube sounding
Scopus关键词: Principal component analysis
; Troposphere
; Heavy rainfall
; inverted V sounding
; loaded gun sounding
; synoptic pattern
; Thin tubes
; Rain
英文摘要: Heavy precipitation in Beijing is modulated by both synoptic forcings and local thermodynamic characteristics of troposphere, which has yet to be well known. This study investigated the large-scale synoptic patterns and local sounding features associated with the summertime heavy precipitation in Beijing, based on long-term surface meteorological observations, radiosonde measurements, in combination of reanalysis data from 2008 to 2017. The results show that the heavy rainfall occurs more frequently in late July, which is associated with the movement of subtropical anticyclone. The sounding parameters during the heavy rainfall days are examined as well. It is found that the heavy rainfall is often related to favourable convective conditions characterized by abundant water vapour and high unstable energy. The soundings for around 45% of heavy rainfall days in Beijing exhibit the pattern of “thin tube” (TT), and those for ~25 and ~20% of heavy rainfall days show the patterns of “loaded gun” (LG) and “inverted V” (IV), respectively. On average, the rainfall amount of TT is 55.8 mm/day, which is ~3 mm/day (~15 mm/day) higher than that of LG (IV). The more frequent and heavier rainfall observed for TT pattern is due to the high values of precipitable water and wind shear. On the large scale, three dominant synoptic patterns associated with heavy rainfall in Beijing have been identified using the T-mode principle component analysis. These synoptic patterns are all characterized by prevailing southerly winds within the lower troposphere, resulting in water vapours being easily transported from southern regions to Beijing, which in turn favours the occurrence of heavy precipitation. These dominant synoptic patterns and thermodynamic characteristics associated with the heavy rainfall in Beijing revealed in this study have important implications for better understanding of heavy rainfall in the North China Plain. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116540
Appears in Collections: 全球变化的国际研究计划
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作者单位: State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China; Department of Atmospheric and Oceanic Sciences, Peking University, Beijing, China; Nanjing University of Information Science & Technology, Nanjing, China
Recommended Citation:
Yan Y.,Miao Y.,Guo J.,et al. Synoptic patterns and sounding-derived parameters associated with summertime heavy rainfall in Beijing[J]. International Journal of Climatology,2019-01-01,39(3)