Phytoplankton response to an intense dust storm in the Tasman Sea in September-October, 2009

Gabric, Albert and Cropp, Roger and McTainsh, Grant and Butler, Harry and Johnston, Barbara and O'Loingsigh, Tadhg and van Tran, Dien (2014) Phytoplankton response to an intense dust storm in the Tasman Sea in September-October, 2009. In: 8th International Conference on Systems Biology (ISB 2014) and the 4th Translational Bioinformatics Conference, 24-27 Oct 2014, Qingdao, China.

Abstract

Here we present a detailed analysis of the marine biological response in the Tasman Sea (25-40ºS, 150-170°E) after the 'Red Dawn' dust storm, which was one the largest recorded in SE Australia in the last 70 years. We examine the impact of dust-derived nutrients deposited to the ocean surface on satellite-derived estimates of phytoplankton biomass as indicated by surface chlorophyll-a. We have simulated contemporaneous atmospheric dust load and deposition over the adjacent ocean using a regional dust transport model that provides daily data from September to December 2009. The phytoplankton response was confined to the region south of 30ºS, with the greatest positive anomalies (>0.6 mgm-3) occurring south of 35ºS, even though deposition was recorded further north. Contrary to previous reports of little biological impacts from dust storms in the Tasman Sea, our results suggest the regional phytoplankton can respond strongly to inputs of aeolian nutrients during the Austral spring if deposition is strong and ocean conditions are favourable.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Poster)
Refereed: No
Item Status: Live Archive
Additional Information: © 2014 IEEE. Paper 118
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 13 Apr 2015 23:23
Last Modified: 02 Mar 2018 05:10
Uncontrolled Keywords: dust storm; Australia; surface pollution; dust transport; ocean conditions
Fields of Research : 05 Environmental Sciences > 0502 Environmental Science and Management > 050204 Environmental Impact Assessment
05 Environmental Sciences > 0503 Soil Sciences > 050303 Soil Biology
04 Earth Sciences > 0405 Oceanography > 040501 Biological Oceanography
Socio-Economic Objective: D Environment > 96 Environment > 9611 Physical and Chemical Conditions of Water > 961104 Physical and Chemical Conditions of Water in Marine Environments
URI: http://eprints.usq.edu.au/id/eprint/26084

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