Coupling between cycles of phytoplankton biomass and aerosol optical depth as derived from SeaWiFS time series in the Subantarctic Southern Ocean.
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 durin...
Published in: | Geophysical Research Letters |
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Language: | English |
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American Geophysical Union
2002
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Online Access: | http://hdl.handle.net/10072/6738 https://doi.org/10.1029/2001GL013545 |
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ftgriffithuniv:oai:research-repository.griffith.edu.au:10072/6738 2023-05-15T18:24:31+02:00 Coupling between cycles of phytoplankton biomass and aerosol optical depth as derived from SeaWiFS time series in the Subantarctic Southern Ocean. Gabric, Albert Cropp, Roger P. Ayers, Gregory McTainsh, Grant Braddock, Roger 2002 http://hdl.handle.net/10072/6738 https://doi.org/10.1029/2001GL013545 English en_AU eng American Geophysical Union Geophysical research Letters http://www.agu.org/journals/gl/ © 2002 American Geophysical Union. Reproduced in accordance with the copyright policy of the publisher. This journal is available online: use hypertext links. Journal article 2002 ftgriffithuniv https://doi.org/10.1029/2001GL013545 2018-07-30T10:18:26Z 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. Griffith Sciences, Griffith School of Environment No Full Text Article in Journal/Newspaper Southern Ocean Griffith University: Griffith Research Online Austral Griffith ENVELOPE(-155.500,-155.500,-85.883,-85.883) Southern Ocean Geophysical Research Letters 29 7 |
institution |
Open Polar |
collection |
Griffith University: Griffith Research Online |
op_collection_id |
ftgriffithuniv |
language |
English |
description |
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. Griffith Sciences, Griffith School of Environment No Full Text |
format |
Article in Journal/Newspaper |
author |
Gabric, Albert Cropp, Roger P. Ayers, Gregory McTainsh, Grant Braddock, Roger |
spellingShingle |
Gabric, Albert Cropp, Roger P. Ayers, Gregory McTainsh, Grant Braddock, Roger Coupling between cycles of phytoplankton biomass and aerosol optical depth as derived from SeaWiFS time series in the Subantarctic Southern Ocean. |
author_facet |
Gabric, Albert Cropp, Roger P. Ayers, Gregory McTainsh, Grant Braddock, Roger |
author_sort |
Gabric, Albert |
title |
Coupling between cycles of phytoplankton biomass and aerosol optical depth as derived from SeaWiFS time series in the Subantarctic Southern Ocean. |
title_short |
Coupling between cycles of phytoplankton biomass and aerosol optical depth as derived from SeaWiFS time series in the Subantarctic Southern Ocean. |
title_full |
Coupling between cycles of phytoplankton biomass and aerosol optical depth as derived from SeaWiFS time series in the Subantarctic Southern Ocean. |
title_fullStr |
Coupling between cycles of phytoplankton biomass and aerosol optical depth as derived from SeaWiFS time series in the Subantarctic Southern Ocean. |
title_full_unstemmed |
Coupling between cycles of phytoplankton biomass and aerosol optical depth as derived from SeaWiFS time series in the Subantarctic Southern Ocean. |
title_sort |
coupling between cycles of phytoplankton biomass and aerosol optical depth as derived from seawifs time series in the subantarctic southern ocean. |
publisher |
American Geophysical Union |
publishDate |
2002 |
url |
http://hdl.handle.net/10072/6738 https://doi.org/10.1029/2001GL013545 |
long_lat |
ENVELOPE(-155.500,-155.500,-85.883,-85.883) |
geographic |
Austral Griffith Southern Ocean |
geographic_facet |
Austral Griffith Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
Geophysical research Letters http://www.agu.org/journals/gl/ |
op_rights |
© 2002 American Geophysical Union. Reproduced in accordance with the copyright policy of the publisher. This journal is available online: use hypertext links. |
op_doi |
https://doi.org/10.1029/2001GL013545 |
container_title |
Geophysical Research Letters |
container_volume |
29 |
container_issue |
7 |
_version_ |
1766205127644938240 |