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

LJ Carpenter, CE Jones, RM Dunk, KE Hornsby, J Woeltjen

Research output: Contribution to journalArticlepeer-review

67 Citations (Scopus)

Abstract

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
Original languageEnglish
Pages (from-to)1805-1816
Number of pages12
JournalAtmospheric Chemistry and Physics
Volume9
Issue number5
DOIs
Publication statusPublished - 2009

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