DOI: 10.1002/jgrd.50476
论文题名: Cloud effects on radiative heating rate profiles over Darwin using ARM and A-train radar/lidar observations
作者: Thorsen T.J. ; Fu Q. ; Comstock J.M.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 11 起始页码: 5637
结束页码: 5654
语种: 英语
英文关键词: A-train
; ARM
; cloud forcing
; radiative heating
Scopus关键词: Atmospheric radiation
; Clouds
; Importance sampling
; Radiant heating
; Satellites
; A-train
; ARM
; Atmospheric radiation measurement programs
; Cloud forcing
; Cloud microphysical properties
; Cloud-aerosol lidar and infrared pathfinder satellite observations
; Radiative heating
; Statistically significant difference
; Optical radar
; cloud microphysics
; cloud radiative forcing
; CloudSat
; heating
; lidar
; radar
; radiation budget
; satellite imagery
; Australia
英文摘要: Observations of clouds from the ground-based U.S. Department of Energy Atmospheric Radiation Measurement (ARM) program and satellite-based A-train are used to compute cloud radiative forcing profiles over the ARM Darwin, Australia site. Cloud properties are obtained from both radar (the ARM Millimeter Cloud Radar (MMCR) and the CloudSat satellite in the A-train) and lidar (the ARM Micropulse lidar (MPL) and the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) satellite in the A-train) observations. Cloud microphysical properties are taken from combined radar and lidar retrievals for ice clouds and radar-only or lidar-only retrievals for liquid clouds. Large, statistically significant differences of up to 1.43 K/d exist between the mean ARM and A-train net cloud radiative forcing profiles. The majority of the difference in cloud radiative forcing profiles is shown to be due to a large difference in the cloud fraction above 12 km. Above this altitude, the A-train cloud fraction is significantly larger because many more clouds are detected by CALIPSO than by the ground-based MPL. It is shown that the MPL is unable to observe as many high clouds as CALIPSO due to being more frequently attenuated and a poorer sensitivity. We also isolate the difference in cloud radiative forcing due to sampling and retrieval differences which are of comparable importance but are of smaller impact than cloud fraction differences. This study demonstrates that A-train observations are better suited for the calculation of cloud radiative forcing profiles at Darwin. In addition, we find that it is necessary to supplement CloudSat with CALIPSO observations to obtain accurate cloud radiative forcing profiles. © 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/63682
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 Atmospheric Sciences, University of Washington, Seattle, WA 98195, United States; Pacific Northwest National Laboratory, Richland, WA, United States
Recommended Citation:
Thorsen T.J.,Fu Q.,Comstock J.M.. Cloud effects on radiative heating rate profiles over Darwin using ARM and A-train radar/lidar observations[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(11)