Globally significant oceanic source of organic carbon aerosol
Significant concentrations of organic carbon (OC) aerosol are observed at three oceanic surface sites (Amsterdam Island, Azores and Mace Head). Two global chemical transport models (CTMs) underpredict OC concentrations at these sites (normalised mean bias of -67% and -58%). During periods of high bi...
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Language: | English |
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Online Access: | https://archimer.ifremer.fr/doc/00237/34831/33290.pdf https://doi.org/10.1029/2008GL033359 https://archimer.ifremer.fr/doc/00237/34831/ |
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ftarchimer:oai:archimer.ifremer.fr:34831 2023-05-15T13:22:24+02:00 Globally significant oceanic source of organic carbon aerosol Spracklen, Dominick V. Arnold, Steve R. Sciare, Jean Carslaw, Kenneth S. Pio, Casimiro 2008-06 application/pdf https://archimer.ifremer.fr/doc/00237/34831/33290.pdf https://doi.org/10.1029/2008GL033359 https://archimer.ifremer.fr/doc/00237/34831/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00237/34831/33290.pdf doi:10.1029/2008GL033359 https://archimer.ifremer.fr/doc/00237/34831/ Copyright 2008 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2008-06 , Vol. 35 , N. 12 / L1281 , P. 1-5 text Publication info:eu-repo/semantics/article 2008 ftarchimer https://doi.org/10.1029/2008GL033359 2021-09-23T20:25:26Z Significant concentrations of organic carbon (OC) aerosol are observed at three oceanic surface sites (Amsterdam Island, Azores and Mace Head). Two global chemical transport models (CTMs) underpredict OC concentrations at these sites (normalised mean bias of -67% and -58%). During periods of high biological activity monthly mean concentrations are underpredicted by a factor of 5-20. At Amsterdam Island and Mace Head, observed OC correlates well (R-2 = 0.61-0.77) with back-trajectory weighted chlorophyll-a, suggesting an oceanic OC source driven by biological activity. We use a combination of remote sensed chlorophyll-a, back trajectories and observed OC to derive an empirical relation between chlorophyll-a and the total oceanic OC emission flux. Using the GEOS-chem CTM we show a global oceanic OC emission, from primary and secondary sources, of similar to 8 Tg/year matches observations. This emission is comparable in magnitude to the fossil fuel OC source and increases the simulated global OC burden by 20%. Article in Journal/Newspaper Amsterdam Island Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Mace ENVELOPE(155.883,155.883,-81.417,-81.417) Geophysical Research Letters 35 12 n/a n/a |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
Significant concentrations of organic carbon (OC) aerosol are observed at three oceanic surface sites (Amsterdam Island, Azores and Mace Head). Two global chemical transport models (CTMs) underpredict OC concentrations at these sites (normalised mean bias of -67% and -58%). During periods of high biological activity monthly mean concentrations are underpredicted by a factor of 5-20. At Amsterdam Island and Mace Head, observed OC correlates well (R-2 = 0.61-0.77) with back-trajectory weighted chlorophyll-a, suggesting an oceanic OC source driven by biological activity. We use a combination of remote sensed chlorophyll-a, back trajectories and observed OC to derive an empirical relation between chlorophyll-a and the total oceanic OC emission flux. Using the GEOS-chem CTM we show a global oceanic OC emission, from primary and secondary sources, of similar to 8 Tg/year matches observations. This emission is comparable in magnitude to the fossil fuel OC source and increases the simulated global OC burden by 20%. |
format |
Article in Journal/Newspaper |
author |
Spracklen, Dominick V. Arnold, Steve R. Sciare, Jean Carslaw, Kenneth S. Pio, Casimiro |
spellingShingle |
Spracklen, Dominick V. Arnold, Steve R. Sciare, Jean Carslaw, Kenneth S. Pio, Casimiro Globally significant oceanic source of organic carbon aerosol |
author_facet |
Spracklen, Dominick V. Arnold, Steve R. Sciare, Jean Carslaw, Kenneth S. Pio, Casimiro |
author_sort |
Spracklen, Dominick V. |
title |
Globally significant oceanic source of organic carbon aerosol |
title_short |
Globally significant oceanic source of organic carbon aerosol |
title_full |
Globally significant oceanic source of organic carbon aerosol |
title_fullStr |
Globally significant oceanic source of organic carbon aerosol |
title_full_unstemmed |
Globally significant oceanic source of organic carbon aerosol |
title_sort |
globally significant oceanic source of organic carbon aerosol |
publisher |
Amer Geophysical Union |
publishDate |
2008 |
url |
https://archimer.ifremer.fr/doc/00237/34831/33290.pdf https://doi.org/10.1029/2008GL033359 https://archimer.ifremer.fr/doc/00237/34831/ |
long_lat |
ENVELOPE(155.883,155.883,-81.417,-81.417) |
geographic |
Mace |
geographic_facet |
Mace |
genre |
Amsterdam Island |
genre_facet |
Amsterdam Island |
op_source |
Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2008-06 , Vol. 35 , N. 12 / L1281 , P. 1-5 |
op_relation |
https://archimer.ifremer.fr/doc/00237/34831/33290.pdf doi:10.1029/2008GL033359 https://archimer.ifremer.fr/doc/00237/34831/ |
op_rights |
Copyright 2008 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2008GL033359 |
container_title |
Geophysical Research Letters |
container_volume |
35 |
container_issue |
12 |
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n/a |
op_container_end_page |
n/a |
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1766364733323083776 |