Air-sea fluxes of biogenic bromine from the tropical and North Atlantic Ocean

Air-sea fluxes and bulk seawater and atmospheric concentrations of bromoform (CHBr3) and dibromomethane (CH2Br2) 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-...

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Bibliographic Details
Published in:Atmospheric Chemistry and Physics
Main Authors: Carpenter, L. J., Jones, C. E., Dunk, R. M., Hornsby, K. E., Woeltjen, J.
Format: Article in Journal/Newspaper
Language:unknown
Published: 2009
Subjects:
Online Access:https://ueaeprints.uea.ac.uk/id/eprint/24299/
https://doi.org/10.5194/acp-9-1805-2009
Description
Summary:Air-sea fluxes and bulk seawater and atmospheric concentrations of bromoform (CHBr3) and dibromomethane (CH2Br2) 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 CHBr3 and CH2Br2. From limited data from eastern Atlantic coastlines, we tentatively suggest that globally, coastal oceans (depth