DOI: 10.1175/JCLI-D-11-00725.1
Scopus记录号: 2-s2.0-84874791049
论文题名: Tropical precipitation extremes
作者: Rossow W.B. ; Mekonnen A. ; Pearl C. ; Goncalves W.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 4 起始页码: 1457
结束页码: 1466
语种: 英语
Scopus关键词: Accumulation rates
; Different frequency
; Meso-scale systems
; Mesoscale distribution
; Meteorological condition
; Precipitation intensity
; Precipitation measurement
; Tropical precipitation
; Climate change
; Lasers
; Natural convection
; Tropics
; Precipitation (meteorology)
; atmospheric circulation
; atmospheric convection
; atmospheric modeling
; climate change
; cloud
; mesoscale meteorology
; precipitation (climatology)
; tropical meteorology
英文摘要: Classifying tropical deep convective systems by the mesoscale distribution of their cloud properties and sorting matching precipitation measurements over an 11-yr period reveals that the whole distribution of instantaneous precipitation intensity and daily average accumulation rate is composed of (at least) two separate distributions representing distinctly different types of deep convection associated with different meteorological conditions (the distributions of non-deep-convective situations are also shown for completeness). The two types of deep convection produce very different precipitation intensities and occur with very different frequencies of occurrence. Several previous studies have shown that the interaction of the largescale tropical circulation with deep convection causes switching between these two types, leading to a substantial increase of precipitation. In particular, the extreme portion of the tropical precipitation intensity distribution, above 2 mm h-1, is produced by 40% of the larger, longer-lived mesoscale-organized type of convection with only about 10% of the ordinary convection occurrences producing such intensities. When average precipitation accumulation rates are considered, essentially all of the values above 2 mm h-1 are produced by the mesoscale systems. Yet today's atmospheric models do not represent mesoscale-organized deep convective systems that are generally larger than current-day circulation model grid cell sizes but smaller than the resolved dynamical scales and last longer than the typical physics time steps. Thus, model-based arguments for how the extreme part of the tropical precipitation distribution might change in a warming climate are suspect. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52032
Appears in Collections: 气候变化事实与影响
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作者单位: Cooperative Remote Sensing Science, Technology Institute, City College of New York, NY, United States; Energy and Environmental Systems Department, North Carolina A and T State University, Greensboro, NC, United States; Instituto Nacional de Pesquisas Espaciais, Centro de Previsão de Tempo e Estudos Climáticos, Sao Paulo, Brazil
Recommended Citation:
Rossow W.B.,Mekonnen A.,Pearl C.,et al. Tropical precipitation extremes[J]. Journal of Climate,2013-01-01,26(4)