The likelihood of observing dust-stimulated phytoplankton growth in waters proximal to the Australian continent

Cropp, R. A., Gabric, A. J., Levasseur, M., McTainsh, G. H., Bowie, A., Hassler, C. S., Law, C. S., McGowan, H., Tindale, N. and Rossel, R. Viscarra (2013) The likelihood of observing dust-stimulated phytoplankton growth in waters proximal to the Australian continent. Journal of Marine Systems, 117-118 43-52. doi:10.1016/j.jmarsys.2013.02.013


Author Cropp, R. A.
Gabric, A. J.
Levasseur, M.
McTainsh, G. H.
Bowie, A.
Hassler, C. S.
Law, C. S.
McGowan, H.
Tindale, N.
Rossel, R. Viscarra
Title The likelihood of observing dust-stimulated phytoplankton growth in waters proximal to the Australian continent
Journal name Journal of Marine Systems   Check publisher's open access policy
ISSN 0924-7963
Publication date 2013-05-01
Sub-type Article (original research)
DOI 10.1016/j.jmarsys.2013.02.013
Volume 117-118
Start page 43
End page 52
Total pages 10
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2014
Language eng
Abstract We develop a tool to assist in identifying a link between naturally occurring aeolian dust deposition and phytoplankton response in the ocean. Rather than examining a single, or small number of dust deposition events, we take a climatological approach to estimate the likelihood of observing a definitive link between dust deposition and a phytoplankton bloom for the oceans proximal to the Australian continent. We use a dust storm index (DSI) to determine dust entrainment in the Lake Eyre Basin (LEB) and an ensemble of modelled atmospheric trajectories of dust transport from the basin, the major dust source in Australia. Deposition into the ocean is computed as a function of distance from the LEB source and the local over-ocean precipitation. The upper ocean's receptivity to nutrients, including dust-borne iron, is defined in terms of time-dependent, monthly climatological fields for light, mixed layer depth and chlorophyll concentration relative to the climatological monthly maximum. The resultant likelihood of a dust-phytoplankton link being observed is then mapped as a function of space and time. Our results suggest that the Southern Ocean (north of 45°S), the North West Shelf, and Great Barrier Reef are ocean regions where a rapid biological response to dust inputs is most likely to be observed. Conversely, due to asynchrony between deposition and ocean receptivity, direct causal links appear unlikely to be observed in the Tasman Sea and Southern Ocean south of 45°S.
Keyword Dust-phytoplankton link
Aeolian dust
Iron limitation
Southern Ocean
Tasman Sea
Great Barrier Reef
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 2014 Collection
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 11 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 12 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Sun, 09 Jun 2013, 10:11:08 EST by System User on behalf of School of Geography, Planning & Env Management