First-order structure function analysis of statistical scale invariance in the AIRS-observed water vapor field

Pressel, Kyle G. and Collins, William D. ORCID: https://orcid.org/0000-0002-4463-9848 (2012) First-order structure function analysis of statistical scale invariance in the AIRS-observed water vapor field. Journal of Climate, 25 (16). pp. 5538-5555. ISSN 0894-8755

Full text not available from this repository. (Request a copy)

Abstract

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.

Item Type:	Article
Uncontrolled Keywords:	satellite observations,atmospheric science ,/dk/atira/pure/subjectarea/asjc/1900/1902
Faculty \ School:	Faculty of Science > School of Environmental Sciences
Related URLs:	https://www.scopus.com/pages/publication...
Depositing User:	LivePure Connector
Date Deposited:	07 Jul 2026 10:25
Last Modified:	08 Jul 2026 14:33
URI:	https://ueaeprints.uea.ac.uk/id/eprint/103697
DOI:	10.1175/JCLI-D-11-00374.1

Actions (login required)

View Item