DOI: 10.1175/JCLI-D-15-0052.1
Scopus记录号: 2-s2.0-84945933745
论文题名: A CloudSat-CALIPSO view of cloud and precipitation properties across cold fronts over the global oceans
作者: Naud C.M. ; Posselt D.J. ; van den Heever S.C.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 17 起始页码: 6743
结束页码: 6762
语种: 英语
Scopus关键词: Belt conveyors
; Clouds
; Moisture
; Optical radar
; Precipitation (chemical)
; Storms
; Cold front
; Environmental temperature
; Extratropical cyclones
; Fronts
; Precipitation distribution
; Precipitation properties
; Temperature contrast
; Warm fronts
; Precipitation (meteorology)
; CALIPSO
; cloud microphysics
; CloudSat
; cold front
; marine atmosphere
; Northern Hemisphere
; precipitation (climatology)
; satellite data
; Southern Hemisphere
; warm front
英文摘要: The distribution of cloud and precipitation properties across oceanic extratropical cyclone cold fronts is examined using four years of combined CloudSat radar and CALIPSO lidar retrievals. The global annual mean cloud and precipitation distributions show that low-level clouds are ubiquitous in the postfrontal zone while higher-level cloud frequency and precipitation peak in the warm sector along the surface front. Increases in temperature and moisture within the cold front region are associated with larger high-level but lower mid-/low-level cloud frequencies and precipitation decreases in the cold sector. This behavior seems to be related to a shift from stratiform to convective clouds and precipitation. Stronger ascent in the warm conveyor belt tends to enhance cloudiness and precipitation across the cold front. A strong temperature contrast between the warm and cold sectors also encourages greater post-cold-frontal cloud occurrence. While the seasonal contrasts in environmental temperature, moisture, and ascent strength are enough to explain most of the variations in cloud and precipitation across cold fronts in both hemispheres, they do not fully explain the differences between Northern and Southern Hemisphere cold fronts. These differences are better explained when the impact of the contrast in temperature across the cold front is also considered. In addition, these large-scale parameters do not explain the relatively large frequency in springtime postfrontal precipitation. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50547
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Applied Physics and Applied Mathematics, Columbia University, NASA Goddard Institute for Space Studies, New York, NY, United States; Department of Atmospheric,Oceanic and Space Sciences, University of Michigan, Ann Arbor, MI, United States; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States
Recommended Citation:
Naud C.M.,Posselt D.J.,van den Heever S.C.. A CloudSat-CALIPSO view of cloud and precipitation properties across cold fronts over the global oceans[J]. Journal of Climate,2015-01-01,28(17)