Preferential dust sources: A geomorphological classification designed for use in global dust-cycle models

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Title Preferential dust sources: A geomorphological classification designed for use in global dust-cycle models
Author Bullard, Joanna E.; Harrison, Sandy P.; Baddock, Matthew C.; Drake, Nick; Gill, Thomas E.; McTainsh, Grant Harvey; Sun, Youbin
Journal Name Journal of Geophysical Research
Year Published 2011
Place of publication United States
Publisher American Geophysical Union
Abstract We present a simple theoretical land-surface classification that can be used to determine the location and temporal behavior of preferential sources of terrestrial dust emissions. The classification also provides information about the likely nature of the sediments, their erodibility and the likelihood that they will generate emissions under given conditions. The scheme is based on the dual notions of geomorphic type and connectivity between geomorphic units. We demonstrate that the scheme can be used to map potential modern-day dust sources in the Chihuahuan Desert, the Lake Eyre Basin and the Taklamakan. Through comparison with observed dust emissions, we show that the scheme provides a reasonable prediction of areas of emission in the Chihuahuan Desert and in the Lake Eyre Basin. The classification is also applied to point source data from the Western Sahara to enable comparison of the relative importance of different land surfaces for dust emissions. We indicate how the scheme could be used to provide an improved characterization of preferential dust sources in global dust-cycle models.
Peer Reviewed Yes
Published Yes
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Copyright Statement Copyright 2011 American Geophysical Union. The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
Volume 116
Page from F04034-1
Page to F04034-20
ISSN 0148-0227
Date Accessioned 2012-03-09; 2012-03-28T22:28:10Z
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Sedimentology
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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