Evidence for dynamic air-water coupling of persistent organic pollutants over the open Atlantic Ocean.

Jones, Kevin C. and Barber, Jonathan L. and Booij, Kees and Jaward, Foday M. (2004) Evidence for dynamic air-water coupling of persistent organic pollutants over the open Atlantic Ocean. Environmental Science and Technology, 38. pp. 2617-2625. ISSN 0013-936X

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Abstract

Ship-board air samples collected between The Netherlands and South Africa in January-February 2001 were analyzed for PCBs and selected organochlorine compounds. Broad latitudinal trends in compound concentrations were influenced by proximity to source areas, land, and air mass origin. Lowest concentrations were observed in the remote south Atlantic (1-32 S), where 7PCB concentra tions were ~10 pg m-3. Here, a diurnal cycle was noted for some PCB congeners, with the daytime concentrations higher than the nighttime concentrations, typically by a factor of 1.5-2.5. The data are consistent with a close coupling of air-open ocean concentrations, which has important implications for future rates of POP removal from the global "recyclable pool". The observations are discussed in the context of the potential controlling variables. Interactions between the phytoplankton and the dissolved phase are implicated in controlling the observations made here and a hypothesis to explain the cycling trends is presented. However, the precise mechanisms remain unclear; further studies are urgently required to elucidate them.

Item Type: Journal Article
Journal or Publication Title: Environmental Science and Technology
Additional Information: RAE_import_type : Journal article RAE_uoa_type : Earth Systems and Environmental Sciences
Uncontrolled Keywords: /dk/atira/pure/researchoutput/libraryofcongress/ge
Subjects:
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 2110
Deposited By: ep_importer
Deposited On: 08 Apr 2008 10:11
Refereed?: Yes
Published?: Published
Last Modified: 30 Jul 2019 00:40
URI: https://eprints.lancs.ac.uk/id/eprint/2110

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