DOI: 10.1002/jgrd.50582
论文题名: Vertical structure of ice cloud layers from CloudSat and CALIPSO measurements and comparison to NICAM simulations
作者: Ham S.-H. ; Sohn B.-J. ; Kato S. ; Satoh M.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 17 起始页码: 9930
结束页码: 9947
语种: 英语
英文关键词: CALIPSO
; CloudSat
; ice cloud
; NICAM
; vertical structure
Scopus关键词: Snow
; CALIPSO
; CloudSat
; Ice clouds
; NICAM
; Vertical structures
; Clouds
; CALIPSO
; CloudSat
; ice
; lidar
; measurement method
; numerical model
; precipitation (climatology)
; sedimentation
; temperature effect
; vertical profile
; water content
英文摘要: The shape of the vertical profile of ice cloud layers is examined using 4 months of CloudSat and Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) global measurements taken on January, April, July, and October 2007. Ice clouds are selected using temperature profiles when the cloud base is located above the 253 K temperature level. The obtained ice water content (IWC), effective radius, or extinction coefficient profiles are normalized by their layer mean values and are expressed in the normalized vertical coordinate, which is defined as 0 and 1 at the cloud base and top heights, respectively. Both CloudSat and CALIPSO observations show that the maximum in the IWC and extinction profiles shifts toward the cloud bottom, as the cloud depth increases. In addition, clouds with a base reaching the surface in a high-latitude region show that the maximum peak of the IWC and extinction profiles occurs near the surface, which is presumably due to snow precipitation. CloudSat measurements show that the seasonal difference in normalized cloud vertical profiles is not significant, whereas the normalized cloud vertical profile significantly varies depending on the cloud type and the presence of precipitation. It is further examined if the 7 day Nonhydrostatic Icosahedral Atmospheric Model (NICAM) simulation results from 25 December 2006 to 1 January 2007 generate similar cloud profile shapes. NICAM IWC profiles also show maximum peaks near the cloud bottom for thick cloud layers and maximum peaks at the cloud bottom for low-level clouds near the surface. It is inferred that oversized snow particles in the NICAM cloud scheme produce a more vertically inhomogeneous IWC profile than observations due to quick sedimentation. Key Points Thicker clouds show maxima in CloudSat/CALIPSO IWC profiles toward cloud baseClouds near surface show maxima at surface in CloudSat/CALIPSO IWC profilesNICAM also has similar features, but showing more inhomogeneous profile ©2013. 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/63331
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: NASA Langley Research Center, Mailstop 420, 100 NASA Rd., Hampton, VA 23681-2199, United States; School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea; Atmosphere and Ocean Research Institute, University of Tokyo, Chiba, Japan
Recommended Citation:
Ham S.-H.,Sohn B.-J.,Kato S.,et al. Vertical structure of ice cloud layers from CloudSat and CALIPSO measurements and comparison to NICAM simulations[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(17)