Correlations between the satellite-derived seasonal cycles of phytoplankton biomass and aerosol optical depth in the Southern Ocean: Eivdence for the influence of sea ice
The relationship between the production of dimethylsulfide (DMS) in the upper ocean and atmospheric sulfate aerosols has been confirmed through local shipboard measurements, and global modeling studies alike. In order to examine whether such a connection may be recoverable in the satellite record, w...
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ftgriffithuniv:oai:research-repository.griffith.edu.au:10072/4350 2023-05-15T13:39:54+02:00 Correlations between the satellite-derived seasonal cycles of phytoplankton biomass and aerosol optical depth in the Southern Ocean: Eivdence for the influence of sea ice Gabric, Albert Shephard, Jill Knight, Jon Jones, Graham J. Trevena, Anne 2005 http://hdl.handle.net/10072/4350 https://doi.org/10.1029/2005GB002546 English en_AU eng American Geophysical Union Global Biogeochemical Cycles © 2005 American Geophysical Union. Reproduced in accordance with the copyright policy of the publisher. This journal is available online: use hypertext links. Journal article 2005 ftgriffithuniv https://doi.org/10.1029/2005GB002546 2018-07-30T10:18:26Z The relationship between the production of dimethylsulfide (DMS) in the upper ocean and atmospheric sulfate aerosols has been confirmed through local shipboard measurements, and global modeling studies alike. In order to examine whether such a connection may be recoverable in the satellite record, we have analyzed the correlation between mean surface chlorophyll (CHL) and aerosol optical depth (AOD) in the Southern Ocean, where the marine atmosphere is relatively remote from anthropogenic and continental influences. We carried out the analysis in 5-degree zonal bands between 50Ӡand 70Ӭ for the period (1997-2004), and in smaller meridional sectors in the Eastern Antarctic, Ross and Weddell seas. Seasonality is moderate to strong in both CHL and AOD signatures throughout the study regions. Coherence in the CHL and AOD time series is strong in the band between 50Ӡand 60Ӭ however this synchrony is absent in the sea-ice zone (SIZ) south of 60Ӯ Marked interannual variability in CHL occurs south of 60Ӭ presumably related to variability in sea-ice production during the previous winter. We find a clear latitudinal difference in the cross correlation between CHL and AOD, with the AOD peak preceding the CHL bloom by up to 6 weeks in the SIZ. This suggests that substantial trace gas emissions (aerosol precursors) are being produced over the SIZ in spring (October-December) as sea ice melts. This hypothesis is supported by field data that record extremely high levels of sulfur species in sea ice, surface seawater, and the overlying atmosphere during ice melt. Griffith Sciences, Griffith School of Environment No Full Text Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean Griffith University: Griffith Research Online Antarctic Southern Ocean Weddell Griffith ENVELOPE(-155.500,-155.500,-85.883,-85.883) Global Biogeochemical Cycles 19 4 n/a n/a |
institution |
Open Polar |
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Griffith University: Griffith Research Online |
op_collection_id |
ftgriffithuniv |
language |
English |
description |
The relationship between the production of dimethylsulfide (DMS) in the upper ocean and atmospheric sulfate aerosols has been confirmed through local shipboard measurements, and global modeling studies alike. In order to examine whether such a connection may be recoverable in the satellite record, we have analyzed the correlation between mean surface chlorophyll (CHL) and aerosol optical depth (AOD) in the Southern Ocean, where the marine atmosphere is relatively remote from anthropogenic and continental influences. We carried out the analysis in 5-degree zonal bands between 50Ӡand 70Ӭ for the period (1997-2004), and in smaller meridional sectors in the Eastern Antarctic, Ross and Weddell seas. Seasonality is moderate to strong in both CHL and AOD signatures throughout the study regions. Coherence in the CHL and AOD time series is strong in the band between 50Ӡand 60Ӭ however this synchrony is absent in the sea-ice zone (SIZ) south of 60Ӯ Marked interannual variability in CHL occurs south of 60Ӭ presumably related to variability in sea-ice production during the previous winter. We find a clear latitudinal difference in the cross correlation between CHL and AOD, with the AOD peak preceding the CHL bloom by up to 6 weeks in the SIZ. This suggests that substantial trace gas emissions (aerosol precursors) are being produced over the SIZ in spring (October-December) as sea ice melts. This hypothesis is supported by field data that record extremely high levels of sulfur species in sea ice, surface seawater, and the overlying atmosphere during ice melt. Griffith Sciences, Griffith School of Environment No Full Text |
format |
Article in Journal/Newspaper |
author |
Gabric, Albert Shephard, Jill Knight, Jon Jones, Graham J. Trevena, Anne |
spellingShingle |
Gabric, Albert Shephard, Jill Knight, Jon Jones, Graham J. Trevena, Anne Correlations between the satellite-derived seasonal cycles of phytoplankton biomass and aerosol optical depth in the Southern Ocean: Eivdence for the influence of sea ice |
author_facet |
Gabric, Albert Shephard, Jill Knight, Jon Jones, Graham J. Trevena, Anne |
author_sort |
Gabric, Albert |
title |
Correlations between the satellite-derived seasonal cycles of phytoplankton biomass and aerosol optical depth in the Southern Ocean: Eivdence for the influence of sea ice |
title_short |
Correlations between the satellite-derived seasonal cycles of phytoplankton biomass and aerosol optical depth in the Southern Ocean: Eivdence for the influence of sea ice |
title_full |
Correlations between the satellite-derived seasonal cycles of phytoplankton biomass and aerosol optical depth in the Southern Ocean: Eivdence for the influence of sea ice |
title_fullStr |
Correlations between the satellite-derived seasonal cycles of phytoplankton biomass and aerosol optical depth in the Southern Ocean: Eivdence for the influence of sea ice |
title_full_unstemmed |
Correlations between the satellite-derived seasonal cycles of phytoplankton biomass and aerosol optical depth in the Southern Ocean: Eivdence for the influence of sea ice |
title_sort |
correlations between the satellite-derived seasonal cycles of phytoplankton biomass and aerosol optical depth in the southern ocean: eivdence for the influence of sea ice |
publisher |
American Geophysical Union |
publishDate |
2005 |
url |
http://hdl.handle.net/10072/4350 https://doi.org/10.1029/2005GB002546 |
long_lat |
ENVELOPE(-155.500,-155.500,-85.883,-85.883) |
geographic |
Antarctic Southern Ocean Weddell Griffith |
geographic_facet |
Antarctic Southern Ocean Weddell Griffith |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_relation |
Global Biogeochemical Cycles |
op_rights |
© 2005 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/10.1029/2005GB002546 |
container_title |
Global Biogeochemical Cycles |
container_volume |
19 |
container_issue |
4 |
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1766126065388879872 |