Coupling between cycles of phytoplankton biomass and aerosol optical depth as derived from SeaWiFS time series in the Subantarctic Southern Ocean.

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Title Coupling between cycles of phytoplankton biomass and aerosol optical depth as derived from SeaWiFS time series in the Subantarctic Southern Ocean.
Author Gabric, Albert Jerome; Cropp, Roger Allan; Ayers, Gregory P.; McTainsh, Grant Harvey; Braddock, Roger David
Journal Name Geophysical research Letters
Year Published 2002
Place of publication Washington
Publisher American Geophysical Union
Abstract The Subantarctic Southern Ocean is a high-nutrient low-chlorophyll region, and it has been suggested that primary production is limited by deep mixing and the availability of iron. Australian dust is high in iron content and can be transported over the Subantarctic Southern Ocean, particularly during the austral spring and summer when dust storm frequency in southern Australia is maximal. We present evidence for a coupling between satellite-derived (SeaWiFS) aerosol optical thickness and chlorophyll concentration in the upper ocean. The coupling is evident at monthly, weekly and daily timescales. Although the monthly coherence is likely to be due to other covarying factors, the coupling at weekly and daily timescales supports the hypothesis that the episodic atmospheric delivery of iron is stimulating phytoplankton growth. We also discuss the impact of oceanic dimethylsulfide production on aerosol concentration in the study region.
Peer Reviewed Yes
Published Yes
Publisher URI http://www.agu.org/journals/gl/
Alternative URI http://dx.doi.org/10.1029/2001GL013545
Copyright Statement Copyright 2002 American Geophysical Union. Reproduced in accordance with the copyright policy of the publisher. This journal is available online: use hypertext links.
Volume 29
Issue Number 7
Page from 1112
Page to 1116
ISSN 0094-8276
Date Accessioned 2003-03-19
Date Available 2009-08-27T06:51:25Z
Language en_AU
Research Centre Atmospheric Environment Research Centre; Australian Rivers Institute
Faculty Faculty of Environmental Sciences
Subject PRE2009-Environmental Sciences
URI http://hdl.handle.net/10072/6738
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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