DOI: 10.1029/2012JD017919
论文题名: Comparison of TRMM precipitation radar and microwave imager rainfall retrievals in tropical cyclone inner cores and rainbands
作者: Zagrodnik J.P. ; Jiang H.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 1 起始页码: 29
结束页码: 42
语种: 英语
英文关键词: algorithm
; rainfall
; tropical cyclone
Scopus关键词: Algorithms
; Hurricanes
; Rain gages
; Brightness temperatures
; Convective parameters
; Precipitation radar
; Rainfall algorithms
; Retrieval algorithms
; Trmm microwave imager
; Tropical cyclone
; Tropical rainfall measuring missions
; Rain
; algorithm
; brightness temperature
; comparative study
; database
; inner core
; microwave imagery
; rainband
; spatiotemporal analysis
; storm surge
; TRMM
; tropical cyclone
英文摘要: Tropical Rainfall Measuring Mission (TRMM) rainfall retrieval algorithms are evaluated in tropical cyclone (TC) inner cores (IC), inner bands (IB), and outer rainbands (OB). In total, 1329 IC, 2149 IB, and 4627 OB storm regions are analyzed using data from a 12-year TRMM Tropical Cyclone Precipitation Feature (TCPF) database containing 1013 TCs viewed from December 1997 to December 2009. Attention is focused on the difference between the Precipitation Radar (PR) 2A25 and the TRMM Microwave Imager (TMI) 2A12 rainfall algorithms. The PR 2A25 produces larger mean rain rates than the TMI 2A12 in inner cores and inner bands, with the greatest difference occurring in hurricanes. This discrepancy is caused mostly by the TMI 2A12 significantly underestimating regions of moderate to heavy rain >15 mm hour-1 or when the PR reflectivity is greater than 30 dBZ. The TMI 2A12 rain rates are most closely related to the percentage coverage of 85 GHz polarization-corrected brightness temperature (PCT) <225 K in the IC and 85 GHz PCT <250 K in the IB and OB. These convective parameters are good predictors of the mean TMI 2A12 rain rate, but significant ice scattering is not always present in areas of heavy rain that are often widespread in TC inner regions. As a result, the TMI 2A12 algorithm may poorly measure the rain rate, particularly in the inner core of hurricanes. Key Points The PR produces larger rain rates that TMI in inner cores and inner bands The algorithm difference is most closely correlated with PR refl. >40 dBZ The TMI 2A12 algorithm may poorly measure the rain rate in the inner cores. © 2012 American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63970
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Earth and Environment, Florida International University, 11200 SW 8th St, Miami, FL 33199, United States
Recommended Citation:
Zagrodnik J.P.,Jiang H.. Comparison of TRMM precipitation radar and microwave imager rainfall retrievals in tropical cyclone inner cores and rainbands[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(1)