DOI: 10.1175/JCLI-D-14-00448.1
Scopus记录号: 2-s2.0-84949887931
论文题名: Distributions of shallow to very deep precipitation-convection in rapidly intensifying tropical cyclones
作者: Tao C. ; Jiang H.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 22 起始页码: 8791
结束页码: 8824
语种: 英语
Scopus关键词: Feedback
; Hurricanes
; Precipitation (meteorology)
; Radar
; Radar measurement
; Rain gages
; Storms
; Tropics
; Vortex flow
; Hurricanes/typhoons
; Precipitation radar
; Radars/radar observations
; Rapid intensification
; Satellite observations
; Total precipitation
; Tropical cyclone
; Tropical rainfall measuring missions
; Rain
英文摘要: Shear-relative distributions of four types of precipitation/convection in tropical cyclones (TCs) are statistically analyzed using 14 years of Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR) data. The dataset of 1139 TRMM PR overpasses of tropical storms through category-2 hurricanes over global TC-prone basins is divided by future 24-h intensity change. It is found that increased and widespread shallow precipitation (defined as where the 20-dBZ radar echo height <6 km) around the storm center is a first sign of rapid intensification (RI) and could be used as a predictor of the onset of RI. The contribution to total volumetric rain and latent heating from shallow and moderate precipitation (20-dBZ echo height between 6 and 10 km) in the inner core is greater in RI storms than in non-RI storms, while the opposite is true for moderately deep (20-dBZ echo height between 10 and 14 km) and very deep precipitation (20-dBZ echo height ≥14 km). The authors argue that RI is more likely triggered by the increase of shallow-moderate precipitation and the appearance of more moderately to very deep convection in the middle of RI is more likely a response or positive feedback to changes in the vortex. For RI storms, a cyclonic rotation of frequency peaks from shallow (downshear right) to moderate (downshear left) to moderately and very deep precipitation (upshear left) is found and may be an indicator of a rapidly strengthening vortex. A ring of almost 90% occurrence of total precipitation is found for storms in the middle of RI, consistent with the previous finding of the cyan and pink ring on the 37-GHz color product. © 2015 American Meteorological Society. 资助项目: NASA, National Aeronautics and Space Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50530
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth and Environment, Florida International University, Miami, FL, United States
Recommended Citation:
Tao C.,Jiang H.. Distributions of shallow to very deep precipitation-convection in rapidly intensifying tropical cyclones[J]. Journal of Climate,2015-01-01,28(22)