Air-sea fluxes of biogenic bromine from the tropical and North Atlantic Ocean
Air-sea fluxes and bulk seawater and atmospheric concentrations of bromoform (CHBr 3 ) and dibromomethane (CH 2 Br 2 ) were measured during two research cruises in the northeast Atlantic (53–59° N, June–July 2006) and tropical eastern Atlantic Ocean including over the African coastal upwelling syste...
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ftdoajarticles:oai:doaj.org/article:d42b30bf5ac14b129267837d84a91fe0 2023-05-15T17:34:06+02:00 Air-sea fluxes of biogenic bromine from the tropical and North Atlantic Ocean L. J. Carpenter C. E. Jones R. M. Dunk K. E. Hornsby J. Woeltjen 2009-03-01T00:00:00Z https://doaj.org/article/d42b30bf5ac14b129267837d84a91fe0 EN eng Copernicus Publications http://www.atmos-chem-phys.net/9/1805/2009/acp-9-1805-2009.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/d42b30bf5ac14b129267837d84a91fe0 Atmospheric Chemistry and Physics, Vol 9, Iss 5, Pp 1805-1816 (2009) Physics QC1-999 Chemistry QD1-999 article 2009 ftdoajarticles 2022-12-31T08:50:43Z Air-sea fluxes and bulk seawater and atmospheric concentrations of bromoform (CHBr 3 ) and dibromomethane (CH 2 Br 2 ) were measured during two research cruises in the northeast Atlantic (53–59° N, June–July 2006) and tropical eastern Atlantic Ocean including over the African coastal upwelling system (16–35° N May–June 2007). Saturations and sea-air fluxes of these compounds generally decreased in the order coastal > upwelling > shelf > open ocean, and outside of coastal regions, a broad trend of elevated surface seawater concentrations with high chlorophyll- a was observed. We show that upwelling regions (coastal and equatorial) represent regional hot spots of bromocarbons, but are probably not of major significance globally, contributing at most a few percent of the total global emissions of CHBr 3 and CH 2 Br 2 . From limited data from eastern Atlantic coastlines, we tentatively suggest that globally, coastal oceans (depth <180 m) together contribute ~2.5 (1.4–3.5) Gmol Br yr −1 of CHBr 3 , excluding influences from anthropogenic sources such as coastal power stations. This flux estimate is close to current estimates of the total open ocean source. We also show that the concentration ratio of CH 2 Br 2 /CHBr 3 in seawater is a strong function of concentration (and location), with a lower CH 2 Br 2 /CHBr 3 ratio found in coastal regions near to macroalgal sources. Article in Journal/Newspaper North Atlantic Northeast Atlantic Directory of Open Access Journals: DOAJ Articles |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
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language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 L. J. Carpenter C. E. Jones R. M. Dunk K. E. Hornsby J. Woeltjen Air-sea fluxes of biogenic bromine from the tropical and North Atlantic Ocean |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Air-sea fluxes and bulk seawater and atmospheric concentrations of bromoform (CHBr 3 ) and dibromomethane (CH 2 Br 2 ) were measured during two research cruises in the northeast Atlantic (53–59° N, June–July 2006) and tropical eastern Atlantic Ocean including over the African coastal upwelling system (16–35° N May–June 2007). Saturations and sea-air fluxes of these compounds generally decreased in the order coastal > upwelling > shelf > open ocean, and outside of coastal regions, a broad trend of elevated surface seawater concentrations with high chlorophyll- a was observed. We show that upwelling regions (coastal and equatorial) represent regional hot spots of bromocarbons, but are probably not of major significance globally, contributing at most a few percent of the total global emissions of CHBr 3 and CH 2 Br 2 . From limited data from eastern Atlantic coastlines, we tentatively suggest that globally, coastal oceans (depth <180 m) together contribute ~2.5 (1.4–3.5) Gmol Br yr −1 of CHBr 3 , excluding influences from anthropogenic sources such as coastal power stations. This flux estimate is close to current estimates of the total open ocean source. We also show that the concentration ratio of CH 2 Br 2 /CHBr 3 in seawater is a strong function of concentration (and location), with a lower CH 2 Br 2 /CHBr 3 ratio found in coastal regions near to macroalgal sources. |
format |
Article in Journal/Newspaper |
author |
L. J. Carpenter C. E. Jones R. M. Dunk K. E. Hornsby J. Woeltjen |
author_facet |
L. J. Carpenter C. E. Jones R. M. Dunk K. E. Hornsby J. Woeltjen |
author_sort |
L. J. Carpenter |
title |
Air-sea fluxes of biogenic bromine from the tropical and North Atlantic Ocean |
title_short |
Air-sea fluxes of biogenic bromine from the tropical and North Atlantic Ocean |
title_full |
Air-sea fluxes of biogenic bromine from the tropical and North Atlantic Ocean |
title_fullStr |
Air-sea fluxes of biogenic bromine from the tropical and North Atlantic Ocean |
title_full_unstemmed |
Air-sea fluxes of biogenic bromine from the tropical and North Atlantic Ocean |
title_sort |
air-sea fluxes of biogenic bromine from the tropical and north atlantic ocean |
publisher |
Copernicus Publications |
publishDate |
2009 |
url |
https://doaj.org/article/d42b30bf5ac14b129267837d84a91fe0 |
genre |
North Atlantic Northeast Atlantic |
genre_facet |
North Atlantic Northeast Atlantic |
op_source |
Atmospheric Chemistry and Physics, Vol 9, Iss 5, Pp 1805-1816 (2009) |
op_relation |
http://www.atmos-chem-phys.net/9/1805/2009/acp-9-1805-2009.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/d42b30bf5ac14b129267837d84a91fe0 |
_version_ |
1766132809901015040 |