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    A modeling study of the seasonal oxygen budget of the global ocean

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    2006JC003731.pdf (620.7Kb)
    Date
    2007-05-09
    Author
    Jin, X.  Concept link
    Najjar, Raymond G.  Concept link
    Louanchi, F.  Concept link
    Doney, Scott C.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/3610
    As published
    https://doi.org/10.1029/2006JC003731
    DOI
    10.1029/2006JC003731
    Keyword
     New production; Remineralization; Dissolved oxygen 
    Abstract
    An ecosystem model embedded in a global ocean general circulation model is used to quantify roles of biological and physical processes on seasonal oxygen variations. We find that the thermally induced seasonal net outgassing (SNO) of oxygen is overestimated by about 30% if gas phase equilibrium is assumed, and we find that seasonal variations in thermocline oxygen due to biology are approximated well using the oxygen anomaly. Outside the tropics and the north Indian Ocean, biological SNO is, on average, 56% of net community production (defined as net oxygen production above 76 m) during the outgassing period and 35% of annual net community production. In the same region the seasonal drawdown of the oxygen anomaly within the upper thermocline (76–500 m) is 76% of the remineralization during the drawdown and 48% of annual remineralization. Applying model-derived relationships to observed O2 climatologies and using independent estimates for tropical and monsoonal systems, we estimate global net community production to be 14.9 ± 2.5 Pg C yr−1.
    Description
    Author Posting. © American Geophysical Union, 2007. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 112 (2007): C05017, doi:10.1029/2006JC003731.
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    • Marine Chemistry and Geochemistry (MC&G)
    Suggested Citation
    Journal of Geophysical Research 112 (2007): C05017
     

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