DOI: 10.1002/jgrd.50523
论文题名: A satellite perspective on cloud water to rain water conversion rates and relationships with environmental conditions
作者: Sorooshian A. ; Wang Z. ; Feingold G. ; L'Ecuyer T.S.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 12 起始页码: 6643
结束页码: 6650
语种: 英语
英文关键词: A-Train
; aerosol
; coalescence
; precipitation
Scopus关键词: Aerosols
; Atmospheric aerosols
; Clouds
; Coalescence
; NASA
; Precipitation (chemical)
; Radar measurement
; Rain
; A-train
; Aerosol optical depths
; Atmospheric stability
; Environmental conditions
; Environmental parameter
; North-eastern Pacific
; Satellite remote sensing data
; Tropical Pacific ocean
; Data handling
; aerosol
; cloud water
; CloudSat
; coalescence
; data set
; environmental conditions
; MODIS
; optical depth
; precipitation (climatology)
; rainwater
; remote sensing
; stratocumulus
; timescale
; troposphere
; Pacific Ocean
; Pacific Ocean (Northeast)
; Pacific Ocean (Southeast)
; Pacific Ocean (Tropical)
英文摘要: A two-year satellite remote sensing data set from the NASA A-Train is used to examine conversion rates of cloud water to rain water for warm maritime clouds with different ranges of mean cloud-layer radar reflectivity and rain rate. Recent work has demonstrated the utility of a novel procedure that relies on the differing sensitivities of passive MODIS measurements and active CloudSat radar measurements to estimate warm cloud conversion rates and associated time scales. That work is extended here to examine regional differences in conversion rates, including sensitivity to environmental parameters such as atmospheric stability and the presence of different aerosol types defined based on values of aerosol optical depth, fine mode fraction, and Ångstrom Exponent. Among eight subregions examined, the tropical Pacific Ocean is characterized by the highest average conversion rate while subtropical stratocumulus cloud regions (far northeastern Pacific Ocean, far southeastern Pacific Ocean, Western Africa coastal region) exhibit the lowest rates. Conversion rates are generally higher at reduced values of lower tropospheric static stability (LTSS). When examining data in two selected ranges for LTSS, higher conversion rates are coincident with higher LWP and factors covarying or rooted in the presence of aerosol types exhibiting lower aerosol index values. Key Points Cloud-to-rain water conversion parameters quantified using A-Train data Conversion faster in unstable environments with lower aerosol concentrations Technique is shown to be useful to examine relative trends in a global sense © 2013. American Geophysical Union. All Rights Reserved. 资助项目: NNX12AC51G
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63624
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 Chemical and Environmental Engineering, University of Arizona, PO BOX 210011, Tucson, AZ 85721, United States; Department of Atmospheric Sciences, University of Arizona, Tucson, AZ, United States; Earth Systems Research Laboratory, NOAA Colorado, Boulder, CO, United States; Department of Atmospheric and Oceanic Sciences, University of Wisconsin, Madison, WI, United States
Recommended Citation:
Sorooshian A.,Wang Z.,Feingold G.,et al. A satellite perspective on cloud water to rain water conversion rates and relationships with environmental conditions[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(12)