Kinky profiles: effects of soil surface heating upon vertical dust concentration profiles in the Channel Country of western Queensland, Australia

Butler, H. J. and McTainsh, G. H. and Hogarth, W. L. and Leys, J. F. (2005) Kinky profiles: effects of soil surface heating upon vertical dust concentration profiles in the Channel Country of western Queensland, Australia. Journal of Geophysical Research, 110 (F4). pp. 1-14. ISSN 0148-0227

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Abstract

In rangelands, unlike cultivated fields, soil surface conditions and vegetation cover are far from uniform. Field measurements taken within rangeland environments show that the shape of vertical dust concentration profiles can vary significantly between wind erosion events. Regression fits used to analyze vertical dust concentration profiles are therefore better for some events than others. Such variability has usually been explained as experimental error (or noise) or as a result of the nonuniformity of surface conditions. A computer simulation model (DSism) is used to examine this variability in terms of wind erosion processes. Analysis of these simulation results together with field observations shows that nonuniformity in surface conditions alone cannot explain variations observed in the vertical dust concentration profiles. These same simulations suggest that much of the variability in vertical dust concentration profiles is the result of thermal heating of the soil surface.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Deposited in accordance with the copyright policy of the publisher. Copyright (2005) American Geophysical Union.
Depositing User: Dr Harry Butler
Faculty / Department / School: Historic - Faculty of Sciences - Department of Maths and Computing
Date Deposited: 11 Oct 2007 01:16
Last Modified: 06 Aug 2013 04:14
Uncontrolled Keywords: wind erosion; dust concentration profiles
Fields of Research (FOR2008): 04 Earth Sciences > 0406 Physical Geography and Environmental Geoscience > 040604 Natural Hazards
05 Environmental Sciences > 0502 Environmental Science and Management > 050209 Natural Resource Management
05 Environmental Sciences > 0503 Soil Sciences > 050305 Soil Physics
Socio-Economic Objective (SEO2008): D Environment > 96 Environment > 9614 Soils > 961402 Farmland, Arable Cropland and Permanent Cropland Soils
Identification Number or DOI: doi: 10.1029/2004JF000272
URI: http://eprints.usq.edu.au/id/eprint/2891

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