Laser ceilometer measurements of Australian dust storm highlight need for reassessment of atmospheric dust plume loads

McGowan, Hamish A. and Soderholm, Joshua (2012) Laser ceilometer measurements of Australian dust storm highlight need for reassessment of atmospheric dust plume loads. Geophysical Research Letters, 39 2: L02804.1-L02804.6. doi:10.1029/2011GL050319


Author McGowan, Hamish A.
Soderholm, Joshua
Total Author Count Override 2
Title Laser ceilometer measurements of Australian dust storm highlight need for reassessment of atmospheric dust plume loads
Journal name Geophysical Research Letters   Check publisher's open access policy
ISSN 0094-8276
1944-8007
Publication date 2012-01-24
Sub-type Article (original research)
DOI 10.1029/2011GL050319
Volume 39
Issue 2
Start page L02804.1
End page L02804.6
Total pages 6
Place of publication Washington, DC, U.S.A.
Publisher American Geophysical Union
Collection year 2013
Language eng
Formatted abstract
The wide ranging impacts of atmospheric dust have received much attention over the past two decades. This research has been driven by need to better resolve the roles of dusts in atmospheric processes; biogeochemical cycles, particularly in response to changing land use and climate; and impacts on human health. Global dust emissions are estimated to range from 1000 and 2000 Mt yr−1. These estimates have been derived from sediment budgets based on surface monitoring of dust concentrations, analyses of palaeo-dust deposits and satellite monitoring of dust plumes. However, significant discrepancies remain between estimated dust transport rates and dust deposition measured directly, or constructed from sediment records. Here we present the first surface based laser ceilometer measurements of a major dust plume in eastern Australia, the largest dust source of the Southern Hemisphere. Results indicate that previous estimates of dust plume loads may have been overestimated by up to 120%. We conclude that new research is required to accurately quantify dust plume loads to enable the highest confidence of modelled dust emissions and their impacts, particularly on climate at this time of unprecedented uncertainty of future climate.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Geography, Planning and Environmental Management Publications
Official 2013 Collection
 
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Created: Mon, 27 Feb 2012, 14:51:50 EST by Alexandra Simmonds on behalf of School of Geography, Planning & Env Management