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contributor authorPressel, Kyle G.
contributor authorCollins, William D.
date accessioned2017-06-09T17:04:50Z
date available2017-06-09T17:04:50Z
date copyright2012/08/01
date issued2012
identifier issn0894-8755
identifier otherams-79074.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4221814
description abstracthe power-law scale dependence, or scaling, of first-order structure functions of the tropospheric water vapor field between 58°S and 58°N 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 first-order 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 = 0.55 and a second that characterizes the statistical scale invariance of the boundary layer with H approximately = ?.
publisherAmerican Meteorological Society
titleFirst-Order Structure Function Analysis of Statistical Scale Invariance in the AIRS-Observed Water Vapor Field
typeJournal Paper
journal volume25
journal issue16
journal titleJournal of Climate
identifier doi10.1175/JCLI-D-11-00374.1
journal fristpage5538
journal lastpage5555
treeJournal of Climate:;2012:;volume( 025 ):;issue: 016
contenttypeFulltext


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