DOI: 10.1175/JCLI-D-17-0632.1
Scopus记录号: 2-s2.0-85052805916
论文题名: Large-scale environmental conditions related to midsummer extreme rainfall events around Japan in the TRMM region
作者: Hamada A. ; Takayabu Y.N.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 17 起始页码: 6933
结束页码: 6945
语种: 英语
英文关键词: Extreme events
; Moisture/moisture budget
; Rainfall
; Satellite observations
; Summer/warm season
; Synoptic-scale processes
Scopus关键词: Budget control
; Moisture
; Rain gages
; Storms
; Troposphere
; Extreme events
; Moisture/moisture budgets
; Satellite observations
; Summer/warm season
; Synoptic-scale process
; Rain
英文摘要: The precipitation characteristics of extreme events in August determined from 13 years of satellite data around Japan in the TRMM observation region and their relationship with large-scale environmental conditions are examined. Two types of extreme events, extreme rainfall and extreme convective events, are defined in each analysis grid box using maximum near-surface rainfall and maximum 40-dBZ echo-top height in each event, respectively. There are clear differences in precipitation characteristics between the two types of extreme events. Extreme rainfall events are more organized precipitation systems than the extreme convective events, with relatively lower echo-top heights and very low lightning activity. There are also clear differences in the related environmental conditions, where the environments related to the extreme rainfall events are somewhat convectively stable and very humid in almost the entire troposphere. These facts are consistent with our previous studies and reinforce the importance of warm-rain processes in extremely intense precipitation productions. The environments related to the extreme rainfall events exhibit a zonally extended moist anomaly in the free troposphere from southern China to the east of Japan, indicating that the excessive moisture transported from the west by a large-scale flow may partially play a role in producing environmental conditions favorable for extreme rainfall. On the other hand, the environments related to extreme convective events are not associated with free-tropospheric moisture inflow. The relationships with the tropical cyclones and upper-tropospheric dynamical fields are also examined, and are found to be clearly different between the extreme rainfall events and extreme convective events. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111387
Appears in Collections: 气候减缓与适应
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作者单位: Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan; Faculty of Sustainable Design, University of Toyama, Toyama, Japan
Recommended Citation:
Hamada A.,Takayabu Y.N.. Large-scale environmental conditions related to midsummer extreme rainfall events around Japan in the TRMM region[J]. Journal of Climate,2018-01-01,31(17)