Australian dust storms in 2002-2003 and their impact on Southern Ocean biogeochemistry
During late 2002 and early 2003 southern Australia was in the grip of drought and experienced one of its most active dust storm seasons in the last 40 years with large dust plumes frequently advected over the adjacent Southern Ocean. We use meteorological records of dust activity, satellite ocean co...
Published in: | Global Biogeochemical Cycles |
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Online Access: | https://research.usq.edu.au/item/9z752/australian-dust-storms-in-2002-2003-and-their-impact-on-southern-ocean-biogeochemistry https://research.usq.edu.au/download/a4efd07d03a8f4430c62405f46c90c2a2e89a884495f49c5ddf44808cae83023/1917480/Gabric_Cropp_McTainsh_etal_GBC_2010_PV.pdf https://doi.org/10.1029/2009GB003541 |
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ftusqland:oai:research.usq.edu.au:9z752 2023-05-15T13:43:56+02:00 Australian dust storms in 2002-2003 and their impact on Southern Ocean biogeochemistry Gabric, A. J. Cropp, R. A. McTainsh, G. H. Johnstone, B. M. Butler, H. Tilbrook, B. Keywood, M. 2010 application/pdf https://research.usq.edu.au/item/9z752/australian-dust-storms-in-2002-2003-and-their-impact-on-southern-ocean-biogeochemistry https://research.usq.edu.au/download/a4efd07d03a8f4430c62405f46c90c2a2e89a884495f49c5ddf44808cae83023/1917480/Gabric_Cropp_McTainsh_etal_GBC_2010_PV.pdf https://doi.org/10.1029/2009GB003541 unknown https://research.usq.edu.au/download/a4efd07d03a8f4430c62405f46c90c2a2e89a884495f49c5ddf44808cae83023/1917480/Gabric_Cropp_McTainsh_etal_GBC_2010_PV.pdf https://doi.org/10.1029/2009GB003541 Gabric, A. J., Cropp, R. A., McTainsh, G. H., Johnstone, B. M., Butler, H., Tilbrook, B. and Keywood, M. 2010. "Australian dust storms in 2002-2003 and their impact on Southern Ocean biogeochemistry." Global Biogeochemical Cycles: an international journal of global change. 24 (2), p. GB2005. https://doi.org/10.1029/2009GB003541 oceanic climate ocean biogeochemistry marine carbon cycle article PeerReviewed 2010 ftusqland https://doi.org/10.1029/2009GB003541 2023-01-23T23:33:02Z During late 2002 and early 2003 southern Australia was in the grip of drought and experienced one of its most active dust storm seasons in the last 40 years with large dust plumes frequently advected over the adjacent Southern Ocean. We use meteorological records of dust activity, satellite ocean colour and aerosol optical depth data, and dust transport modeling to investigate the transport and deposition of mineral dust from Australia over adjacent ocean regions and to correlate it with biological response in phytoplankton standing stock as measured by chlorophyll-a concentration in five-degree latitude bands from 40-60°S. Seasonal maxima in mean surface chlorophyll-a of ~0.5 mg m-3 were not achieved until late Jan 2003 or during February in the more southerly bands, which when compared with a 9-year satellite mean climatology suggests the phenology of the bloom in 2002-03 was atypical. Contemporaneous field data on CO2 fugacity collected on transects between Tasmania and Antarctica show that significant atmospheric CO2 drawdown occurred as far south as 60°S during February 2003. Our results provide strong evidence for a large-scale natural dust fertilization event in the Australian sector of the Southern Ocean, and highlight the importance of dust-derived nutrients in the marine carbon cycle of the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctica Southern Ocean University of Southern Queensland: USQ ePrints Southern Ocean Global Biogeochemical Cycles 24 2 n/a n/a |
institution |
Open Polar |
collection |
University of Southern Queensland: USQ ePrints |
op_collection_id |
ftusqland |
language |
unknown |
topic |
oceanic climate ocean biogeochemistry marine carbon cycle |
spellingShingle |
oceanic climate ocean biogeochemistry marine carbon cycle Gabric, A. J. Cropp, R. A. McTainsh, G. H. Johnstone, B. M. Butler, H. Tilbrook, B. Keywood, M. Australian dust storms in 2002-2003 and their impact on Southern Ocean biogeochemistry |
topic_facet |
oceanic climate ocean biogeochemistry marine carbon cycle |
description |
During late 2002 and early 2003 southern Australia was in the grip of drought and experienced one of its most active dust storm seasons in the last 40 years with large dust plumes frequently advected over the adjacent Southern Ocean. We use meteorological records of dust activity, satellite ocean colour and aerosol optical depth data, and dust transport modeling to investigate the transport and deposition of mineral dust from Australia over adjacent ocean regions and to correlate it with biological response in phytoplankton standing stock as measured by chlorophyll-a concentration in five-degree latitude bands from 40-60°S. Seasonal maxima in mean surface chlorophyll-a of ~0.5 mg m-3 were not achieved until late Jan 2003 or during February in the more southerly bands, which when compared with a 9-year satellite mean climatology suggests the phenology of the bloom in 2002-03 was atypical. Contemporaneous field data on CO2 fugacity collected on transects between Tasmania and Antarctica show that significant atmospheric CO2 drawdown occurred as far south as 60°S during February 2003. Our results provide strong evidence for a large-scale natural dust fertilization event in the Australian sector of the Southern Ocean, and highlight the importance of dust-derived nutrients in the marine carbon cycle of the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Gabric, A. J. Cropp, R. A. McTainsh, G. H. Johnstone, B. M. Butler, H. Tilbrook, B. Keywood, M. |
author_facet |
Gabric, A. J. Cropp, R. A. McTainsh, G. H. Johnstone, B. M. Butler, H. Tilbrook, B. Keywood, M. |
author_sort |
Gabric, A. J. |
title |
Australian dust storms in 2002-2003 and their impact on Southern Ocean biogeochemistry |
title_short |
Australian dust storms in 2002-2003 and their impact on Southern Ocean biogeochemistry |
title_full |
Australian dust storms in 2002-2003 and their impact on Southern Ocean biogeochemistry |
title_fullStr |
Australian dust storms in 2002-2003 and their impact on Southern Ocean biogeochemistry |
title_full_unstemmed |
Australian dust storms in 2002-2003 and their impact on Southern Ocean biogeochemistry |
title_sort |
australian dust storms in 2002-2003 and their impact on southern ocean biogeochemistry |
publishDate |
2010 |
url |
https://research.usq.edu.au/item/9z752/australian-dust-storms-in-2002-2003-and-their-impact-on-southern-ocean-biogeochemistry https://research.usq.edu.au/download/a4efd07d03a8f4430c62405f46c90c2a2e89a884495f49c5ddf44808cae83023/1917480/Gabric_Cropp_McTainsh_etal_GBC_2010_PV.pdf https://doi.org/10.1029/2009GB003541 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Antarc* Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctica Southern Ocean |
op_relation |
https://research.usq.edu.au/download/a4efd07d03a8f4430c62405f46c90c2a2e89a884495f49c5ddf44808cae83023/1917480/Gabric_Cropp_McTainsh_etal_GBC_2010_PV.pdf https://doi.org/10.1029/2009GB003541 Gabric, A. J., Cropp, R. A., McTainsh, G. H., Johnstone, B. M., Butler, H., Tilbrook, B. and Keywood, M. 2010. "Australian dust storms in 2002-2003 and their impact on Southern Ocean biogeochemistry." Global Biogeochemical Cycles: an international journal of global change. 24 (2), p. GB2005. https://doi.org/10.1029/2009GB003541 |
op_doi |
https://doi.org/10.1029/2009GB003541 |
container_title |
Global Biogeochemical Cycles |
container_volume |
24 |
container_issue |
2 |
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n/a |
op_container_end_page |
n/a |
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1766195216114515968 |