DOI: 10.1029/2012JD018092
论文题名: Synergies and complementarities of cloudsat-calipso snow observations
作者: Battaglia A. ; Delanoë J.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 2 起始页码: 721
结束页码: 731
语种: 英语
Scopus关键词: Clouds
; Depth profiling
; Liquids
; Optical radar
; Sensors
; Backscattering coefficients
; Cloud-aerosol lidar with orthogonal polarizations
; Growth process
; Ice nucleation
; Precipitating clouds
; Radar reflectivities
; Remote sensing techniques
; Supercooled liquid water
; Snow
; CALIPSO
; CloudSat
; complementarity
; precipitation (climatology)
; radar
; remote sensing
; snow cover
; synergism
英文摘要: Four years (2007-2010) of colocated 94 GHz CloudSat radar reflectivities and 532 nm CALIPSO Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) backscattering coefficients are used to globally characterize snow-precipitating clouds. CALIOP is particularly useful for the detection of mixed and supercooled liquid water (SLW) layers. Liquid layers are common in snow precipitating clouds: overall/over sea/over land 49%/ 57%/33% of the snowy profiles present SLW or mixed-phase layers. The spatial and seasonal dependencies of our results-with snowing clouds more likely to be associated with mixed phase during summer periods-are related to snow layer top temperatures. SLW occurs within the majority (>80%) of snow-precipitating clouds with cloud tops warmer than 250 K, and is present 50% of the time when the snow-layer top temperature is about 240 K. There is a marked tendency for such layers to occur close to the top of the snow-precipitating layer (75% of the times within 500 m). Both instruments can be synergetically used for profiling ice-phase-only snow, especially for light snow (Z<0 dBZ, S<0.16 mm/h) when CALIOP is capable of penetrating, on average, more than half of the snow layer depth. These results have profound impact for deepening our understanding of ice nucleation and snow growth processes, for improving active and passive snow remote sensing techniques, and for planning snow-precipitation missions. © 2012. American Geophysical Union. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64018
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 Physics andAstronomy, University of Leicester, University Rd., LE17RH, Leicester, United Kingdom; LATMOS, IPSL, UVSQ, Guyancourt, France
Recommended Citation:
Battaglia A.,Delanoë J.. Synergies and complementarities of cloudsat-calipso snow observations[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(2)