DOI: 10.1175/JCLI-D-16-0057.1
Scopus记录号: 2-s2.0-85001097611
论文题名: Synoptic situations of extreme hourly precipitation over China
作者: Luo Y. ; Wu M. ; Ren F. ; Li J. ; Wong W.-K.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 24 起始页码: 8703
结束页码: 8719
语种: 英语
Scopus关键词: Climatology
; Coastal zones
; Frequency bands
; Gages
; Precipitation (meteorology)
; Rain gages
; Storms
; Vortex flow
; Convective storms
; High frequency bands
; Mesoscale Convective System
; Radar reflectivities
; Regional distribution
; Seasonal variation
; South Coastal Area
; Storm environments
; Rain
英文摘要: In this study, synoptic situations associated with extreme hourly precipitation over China are investigated using rain gauge data, weather maps, and composite radar reflectivity data. Seasonal variations of hourly precipitation (>0.1 mm h-1) suggest complicated regional features in the occurrence frequency and intensity of rainfall. The 99.9th percentile is thus used as the threshold to define the extreme hourly rainfall for each station. The extreme rainfall is the most intense over the south coastal areas and the North China Plain. About 77% of the extreme rainfall records occur in summer with a peak in July (30.4%) during 1981-2013. Nearly 5800 extreme hourly rainfall records in 2011-15 are classified into four types according to the synoptic situations under which they occur: the tropical cyclone (TC), surface front, vortex/shear line, and weak-synoptic forcing. They contribute 8.0%, 13.9%, 39.1%, and 39.0%, respectively, to the total occurrence and present distinctive characteristics in regional distribution and seasonal or diurnal variations. The TC type occurs most frequently along the coasts and decreases progressively toward inland China; the frontal type is distributed relatively evenly east of 104°E; the vortex/shear line type shows a prominent center over the Sichuan basin with two high-frequency bands extending from the center southeastward and northeastward, respectively; and the weak-synoptic type occurs more frequently in southeast, southwest, and northern China, and in the easternmost area of northeast China. Occurrences of the weak-synoptic type have comparable contributions from mesoscale convective systems and smaller-scale storms with notable differences in their preferred locations. © 2016 American Meteorological Society. 资助项目: NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50347
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, China; University of Chinese Academy of Sciences, Beijing, China; Hong Kong Observatory, Hong Kong
Recommended Citation:
Luo Y.,Wu M.,Ren F.,et al. Synoptic situations of extreme hourly precipitation over China[J]. Journal of Climate,2016-01-01,29(24)