DOI: 10.1002/jgrd.50198
论文题名: Global seasonal variations of midday planetary boundary layer depth from CALIPSO space-borne LIDAR
作者: McGrath-Spangler E.L. ; Denning A.S.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 3 起始页码: 1226
结束页码: 1233
语种: 英语
英文关键词: CALIPSO
; LIDAR
; planetary boundary layer
; seasonal cycle
Scopus关键词: Arid regions
; Optical radar
; CALIPSO
; Commercial aircraft
; Higher frequencies
; Planetary boundary layers
; Prominent features
; Regional variation
; Seasonal cycle
; Tropical rain forest
; Atmospheric thermodynamics
; aerosol
; boundary layer
; estimation method
; global perspective
; lidar
; midlatitude environment
; oceanic convection
; planetary atmosphere
; sampling
; satellite imagery
; seasonal variation
; subsidence
; Asia
英文摘要: We present a new global analysis of the depth of the planetary boundary layer (PBL) and consider regional variations throughout the year. PBL depth is estimated from the vertical variance of CALIPSO space-borne LIDAR backscatter associated with aerosol and shallow clouds during midday satellite overpasses and is only retrieved in the absence of optically thick clouds. The resulting analysis of over 100 million retrievals per year is therefore only a sample with higher frequency over deserts and other regions of strong subsidence, and lower frequency over regions of deep convection such as the ITCZ, tropical rainforests, and the Asian Monsoon. The mean of sampled PBL depths ranges from 500 m over cold oceans to more than 3000 m over hot deserts. The seasonal cycle of analyzed PBL depth is stronger over land than over water, and seasonality over land and midlatitude oceans is of opposite sign. Wintertime storm tracks and stratocumulus regions over subtropical oceans are prominent features of the analysis. Although evaluation of the new analysis is difficult due to previous sparse sampling by other methods, comparison of LIDAR-retrieved PBL depth with data collected by commercial aircraft generally shows good agreement. ©2013. American Geophysical Union. All Rights Reserved. 资助项目: NNX08AV04H
; NNX11AB87G
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63943
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: Universities Space Research Association, Columbia, MD, United States; Global Modeling and Assimilation Office, Code 610.1, NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, MD 20771, United States; Department of Atmospheric Science, Colorado State University, 1371 Campus Delivery, Fort Collins, CO, United States
Recommended Citation:
McGrath-Spangler E.L.,Denning A.S.. Global seasonal variations of midday planetary boundary layer depth from CALIPSO space-borne LIDAR[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(3)