High atmosphere-ocean exchange of organic carbon in the NE subtropical Atlantic

Details High atmosphere-ocean exchange of organic carbon in the NE subtropical Atlantic High atmosphere-ocean exchange of organic carbon in the NE subtropical Atlantic

Nov 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3221807d&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 21, CiteID L21807

Physics

15

Atmospheric Composition And Structure: Air/Sea Constituent Fluxes (3339, 4504), Atmospheric Composition And Structure: Biosphere/Atmosphere Interactions (0426, 1610), Biogeosciences: Biogeochemical Cycles, Processes, And Modeling (0412, 0793, 1615, 4805, 4912), Biogeosciences: Carbon Cycling (4806), Biogeosciences: Marine Systems (4800)

Scientific paper

The air-sea exchange of organic carbon (OC) remains largely unexplored, except for few organic compounds comprising a small fraction of the total aerosol and gaseous OC in the atmosphere. Observations of high atmospheric concentrations and diffusive air-sea exchanges for such individual organic compounds, suggest that air-sea exchange of total OC may contribute significantly to the oceanic carbon budget. Here we quantify the atmosphere-ocean exchanges of total OC in the NE Subtropical Atlantic. Average net gaseous diffusive air-water fluxes averaged -31 and -25 mmol C m-2 d-1 for the spring and fall, respectively, exceeding measured OC inputs by dry aerosol deposition (FDDOC, -0.98 mmol C m-2 d-1) and net CO2 exchange (FCO2, -6.3 mmol C m-2 d-1). These fluxes are important to understand the regional carbon budget of the NE Subtropical Atlantic, and depict the atmosphere as a major dynamic vector for OC exchange with the ocean.

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