Biophysical coupling in remotely-sensed wind stress, sea surface temperature, sea ice and chlorophyll concentrations in the South Indian Ocean
Satellite records of chlorophyll, sea-surface temperature, sea-ice concentration and wind-stress curl, together with reanalysis wind fields, have been analysed to identify connections between the physical environment and phytoplankton growth. The study focusses on the BROKE-West survey region in the...
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ftunivtasecite:oai:ecite.utas.edu.au:70483 2023-05-15T13:34:56+02:00 Biophysical coupling in remotely-sensed wind stress, sea surface temperature, sea ice and chlorophyll concentrations in the South Indian Ocean Schwarz, JN Raymond, B Williams, GD Pasquer, B Marsland, SJ Gorton, RJ 2010 https://doi.org/10.1016/j.dsr2.2009.06.014 http://ecite.utas.edu.au/70483 en eng Pergamon-Elsevier Science Ltd http://dx.doi.org/10.1016/j.dsr2.2009.06.014 Schwarz, JN and Raymond, B and Williams, GD and Pasquer, B and Marsland, SJ and Gorton, RJ, Biophysical coupling in remotely-sensed wind stress, sea surface temperature, sea ice and chlorophyll concentrations in the South Indian Ocean, Deep-Sea Research Part 2 -Topical Studies in Oceanography, 57, (9-10) pp. 701-722. ISSN 0967-0645 (2010) [Refereed Article] http://ecite.utas.edu.au/70483 Biological Sciences Evolutionary Biology Biogeography and Phylogeography Refereed Article PeerReviewed 2010 ftunivtasecite https://doi.org/10.1016/j.dsr2.2009.06.014 2019-12-13T21:38:07Z Satellite records of chlorophyll, sea-surface temperature, sea-ice concentration and wind-stress curl, together with reanalysis wind fields, have been analysed to identify connections between the physical environment and phytoplankton growth. The study focusses on the BROKE-West survey region in the Indian Ocean sector of the Southern Ocean: 20 to 90E, 70 to 50S. Correlation and regression analyses showed that, of the parameters that can be routinely monitored from space, wind stress and sea surface temperature were most strongly correlated with chlorophyll across the BROKE-West survey area during the period of the survey. Each of these factors, as well as sea ice concentration, was found to be strongly correlated with chlorophyll at different locations. Three distinct regions were identified: The continental shelf and slope (max. depth=3000 m), where satellite data were most obstructed by ice and clouds, supported high concentrations of chlorophyll throughout the growth season (October to April), and although the most important factors determining chlorophyll were likely to be those not observable using remote sensing, close to 100% of variability in surface chlorophyll could be predicted by sea-surface temperature and sea ice concentration. Offshore to the west of 45E, the eastern Weddell Gyre was found to retain sea-ice later into the growth season and support chlorophyll concentrations on the order of 0.1 mg m -3. Wind-driven advection of sea ice to the north and south of the Antarctic Divergence, located at 64S, produced a strong positive correlation between chlorophyll concentrations along the landward and off-shore edges of the seasonal ice zone and the Southern Annular Mode. Offshore to the east of 45E, chlorophyll concentrations encountered during the BROKE-West cruise were found to be unusually high. This was attributed to a southerly excursion of the Antarctic Circumpolar Current corresponding to negative Southern Annular Mode indices during the cruise. Significant, regionally varying correlations were found between the physical and biological parameters examined and climatological indices, including the Southern Annular Mode and the tropical El Nino-Southern Oscillation signal. 2010 Elsevier Ltd. Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean eCite UTAS (University of Tasmania) Antarctic Curl ENVELOPE(-63.071,-63.071,-70.797,-70.797) Indian Southern Ocean The Antarctic Weddell Deep Sea Research Part II: Topical Studies in Oceanography 57 9-10 701 722 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Evolutionary Biology Biogeography and Phylogeography |
spellingShingle |
Biological Sciences Evolutionary Biology Biogeography and Phylogeography Schwarz, JN Raymond, B Williams, GD Pasquer, B Marsland, SJ Gorton, RJ Biophysical coupling in remotely-sensed wind stress, sea surface temperature, sea ice and chlorophyll concentrations in the South Indian Ocean |
topic_facet |
Biological Sciences Evolutionary Biology Biogeography and Phylogeography |
description |
Satellite records of chlorophyll, sea-surface temperature, sea-ice concentration and wind-stress curl, together with reanalysis wind fields, have been analysed to identify connections between the physical environment and phytoplankton growth. The study focusses on the BROKE-West survey region in the Indian Ocean sector of the Southern Ocean: 20 to 90E, 70 to 50S. Correlation and regression analyses showed that, of the parameters that can be routinely monitored from space, wind stress and sea surface temperature were most strongly correlated with chlorophyll across the BROKE-West survey area during the period of the survey. Each of these factors, as well as sea ice concentration, was found to be strongly correlated with chlorophyll at different locations. Three distinct regions were identified: The continental shelf and slope (max. depth=3000 m), where satellite data were most obstructed by ice and clouds, supported high concentrations of chlorophyll throughout the growth season (October to April), and although the most important factors determining chlorophyll were likely to be those not observable using remote sensing, close to 100% of variability in surface chlorophyll could be predicted by sea-surface temperature and sea ice concentration. Offshore to the west of 45E, the eastern Weddell Gyre was found to retain sea-ice later into the growth season and support chlorophyll concentrations on the order of 0.1 mg m -3. Wind-driven advection of sea ice to the north and south of the Antarctic Divergence, located at 64S, produced a strong positive correlation between chlorophyll concentrations along the landward and off-shore edges of the seasonal ice zone and the Southern Annular Mode. Offshore to the east of 45E, chlorophyll concentrations encountered during the BROKE-West cruise were found to be unusually high. This was attributed to a southerly excursion of the Antarctic Circumpolar Current corresponding to negative Southern Annular Mode indices during the cruise. Significant, regionally varying correlations were found between the physical and biological parameters examined and climatological indices, including the Southern Annular Mode and the tropical El Nino-Southern Oscillation signal. 2010 Elsevier Ltd. |
format |
Article in Journal/Newspaper |
author |
Schwarz, JN Raymond, B Williams, GD Pasquer, B Marsland, SJ Gorton, RJ |
author_facet |
Schwarz, JN Raymond, B Williams, GD Pasquer, B Marsland, SJ Gorton, RJ |
author_sort |
Schwarz, JN |
title |
Biophysical coupling in remotely-sensed wind stress, sea surface temperature, sea ice and chlorophyll concentrations in the South Indian Ocean |
title_short |
Biophysical coupling in remotely-sensed wind stress, sea surface temperature, sea ice and chlorophyll concentrations in the South Indian Ocean |
title_full |
Biophysical coupling in remotely-sensed wind stress, sea surface temperature, sea ice and chlorophyll concentrations in the South Indian Ocean |
title_fullStr |
Biophysical coupling in remotely-sensed wind stress, sea surface temperature, sea ice and chlorophyll concentrations in the South Indian Ocean |
title_full_unstemmed |
Biophysical coupling in remotely-sensed wind stress, sea surface temperature, sea ice and chlorophyll concentrations in the South Indian Ocean |
title_sort |
biophysical coupling in remotely-sensed wind stress, sea surface temperature, sea ice and chlorophyll concentrations in the south indian ocean |
publisher |
Pergamon-Elsevier Science Ltd |
publishDate |
2010 |
url |
https://doi.org/10.1016/j.dsr2.2009.06.014 http://ecite.utas.edu.au/70483 |
long_lat |
ENVELOPE(-63.071,-63.071,-70.797,-70.797) |
geographic |
Antarctic Curl Indian Southern Ocean The Antarctic Weddell |
geographic_facet |
Antarctic Curl Indian Southern Ocean The Antarctic Weddell |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_relation |
http://dx.doi.org/10.1016/j.dsr2.2009.06.014 Schwarz, JN and Raymond, B and Williams, GD and Pasquer, B and Marsland, SJ and Gorton, RJ, Biophysical coupling in remotely-sensed wind stress, sea surface temperature, sea ice and chlorophyll concentrations in the South Indian Ocean, Deep-Sea Research Part 2 -Topical Studies in Oceanography, 57, (9-10) pp. 701-722. ISSN 0967-0645 (2010) [Refereed Article] http://ecite.utas.edu.au/70483 |
op_doi |
https://doi.org/10.1016/j.dsr2.2009.06.014 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
57 |
container_issue |
9-10 |
container_start_page |
701 |
op_container_end_page |
722 |
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1766059175192821760 |