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

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posted on 2011-10-11, 13:45 authored by Joanna BullardJoanna Bullard, Sandy P. Harrison, Matthew C. Baddock, Nick A. Drake, Thomas E. Gill, Grant H. McTainsh, Youbin Sun
We present a simple theoretical land-surface classification that can be used to determine the location and temporal behaviour 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 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 characterisation of preferential dust sources in global dust-cycle models.

History

School

  • Social Sciences

Department

  • Geography and Environment

Citation

BULLARD, J.E. ... et al., 2011. Preferential dust sources: a geomorphological classification designed for use in global dust-cycle models. Journal of Geophysical Research - Earth Surface, 116, F04034, doi:10.1029/2011JF002061.

Publisher

© American Geophysical Union

Version

  • AM (Accepted Manuscript)

Publication date

2011

Notes

This article was published in the journal, Journal of Geophysical Research - Earth Surface [© American Geophysical Union] and the definitive version is available at: http://dx.doi.org/doi:10.1029/2011JF002061

Language

  • en

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