DOI: 10.1175/JCLI-D-11-00374.1
Scopus记录号: 2-s2.0-84865703420
论文题名: First-order structure function analysis of statistical scale invariance in the AIRS-observed water vapor field
作者: Pressel K.G. ; Collins W.D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 16 起始页码: 5538
结束页码: 5555
语种: 英语
Scopus关键词: Atmospheric infrared sounders
; Directional dependence
; Extratropics
; First-order
; Free troposphere
; Global maximum
; Power-law
; Satellite observations
; Scale dependence
; Scale invariance
; Scaling exponent
; Scaling regimes
; Seasonal dependence
; Statistical scale
; Structure functions
; Structure-function analysis
; Water vapor fields
; Infrared devices
; Scaling laws
; Statistics
; Troposphere
; Vapors
; Infrared instruments
; AIRS
; satellite imagery
; statistical analysis
; troposphere
; water vapor
英文摘要: The power-law scale dependence, or scaling, of first-order structure functions of the tropospheric water vapor field between 588S and 588N is investigated using observations from the Atmospheric Infrared Sounder (AIRS). Power-law scale dependence of the first-order structure function would indicate that the water vapor field exhibits statistical scale invariance. Directional and directionally independent firstorder structure functions are computed to assess the directional dependence of derived first-order structure function scaling exponents (H) for a range of scales from 50 to 500 km. In comparison to other methods of assessing statistical scale invariance, the methodology used here requires minimal assumptions regarding the homogeneity of the spatial distribution of data within regions of analysis. Additionally, the methodology facilitates the evaluation of anisotropy and quantifies the extent to which the structure functions exhibit scale invariance. The spatial and seasonal dependence of the computed scaling exponents are explored. Minimum scaling exponents at all levels are shown to occur proximate to the equator, while the global maximum is shown to occur in the middle troposphere near the tropical-subtropical margin of the winter hemisphere. From a detailed analysis of AIRS maritime scaling exponents, it is concluded that the AIRS observations suggest the existence of two scaling regimes in the extratropics. One of these regimes characterizes the statistical scale invariance the free troposphere with H approximately 5 0.55 and a second that characterizes the statistical scale invariance of the boundary layer with H approximately = 1/3. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52290
Appears in Collections: 气候变化事实与影响
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作者单位: University of California, Berkeley, CA, United States; Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
Recommended Citation:
Pressel K.G.,Collins W.D.. First-order structure function analysis of statistical scale invariance in the AIRS-observed water vapor field[J]. Journal of Climate,2012-01-01,25(16)