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Drivers of Australian dust: a case study of frontal winds and dust dynamics in the lower Lake Eyre Basin

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posted on 10.08.2015 by Matthew Baddock, K. Parsons, Craig L. Strong, John Leys, Grant H. McTainsh
The roles of pre-frontal, frontal and post-frontal winds as the primary wind systems for dust entrainment and transport in Australia are well established. While the relevance of each system has been observed across different wind erosion events in central Australia, the entrainment of dust by all three winds during the passage of an individual front has not been demonstrated until now. Synoptic information, satellite aerosol and imagery, meteorological and dust concentration data are presented for a single case study erosion event in the lower Lake Eyre Basin. This event demonstrates variable dust transport in three different directions from one of the southern Hemisphere's most significant source regions, and the changing nature of the active dust pathways during the passage of a frontal system. While only a single dust event is considered, the findings show the complexity of mineral aerosol emission and transport patterns even within an individual dust outbreak. For the lower Lake Eyre Basin, this appreciation of pathway behaviour is significant for better understanding the role of aeolian inputs from the dominant Australian source to surrounding marine systems. In a wider context, the findings exhibit the detailed insights into major dust source dynamics that can be obtained from high resolution spatial and particularly temporal data, as used in combination. This work highlights the importance of adequately resolved data for the accurate determination of dust entrainment and transport patterns of major dust sources.

Funding

The Community DustWatch project was funded by the NSW OEH and Caring for Our Country funding (Project A0000007342g) from the Australian Government.

History

School

  • Social Sciences

Department

  • Geography and Environment

Published in

Earth Surface Processes and Landforms

Citation

BADDOCK, M.C. ... et al, 2015. Drivers of Australian dust: a case study of frontal winds and dust dynamics in the lower Lake Eyre Basin. Earth Surface Processes and Landforms, 40(14), pp. 1982–1988.

Publisher

© Wiley

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2015

Notes

This is the peer reviewed version of the following article: BADDOCK, M.C. ... et al, 2015. Drivers of Australian dust: a case study of frontal winds and dust dynamics in the lower Lake Eyre Basin. Earth Surface Processes and Landforms, 40(14), pp. 1982–1988., which has been published in final form at http://dx.doi.org/10.1002/esp.3773. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.

ISSN

1096-9837

Language

en

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