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Controls of the surface water partial pressure of CO2 in the North Sea
Thomas, H.; Bozec, Y.; Elkalay, K.; de Baar, H.J.W.; Borges, A.V.; Schiettecatte, L.-S. (2005). Controls of the surface water partial pressure of CO2 in the North Sea. Biogeosci. Discuss. 2(4): 757-777
In: Biogeosciences Discussions. Copernicus Publications: Göttingen. ISSN 1810-6285, meer
Is gerelateerd aan:
Thomas, H.; Bozec, Y.; Elkalay, K.; de Baar, H.J.W.; Borges, A.V.; Schiettecatte, L.-S. (2005). Controls of the surface water partial pressure of CO2 in the North Sea. Biogeosciences 2(4): 323-334. https://dx.doi.org/10.5194/bg-2-323-2005, meer
Peer reviewed article  
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  • Thomas, H., meer
  • Bozec, Y.
  • Elkalay, K.
  • de Baar, H.J.W.
  • Borges, A.V., meer
  • Schiettecatte, L.-S., meer
Abstract
    The seasonal variability of the partial pressure of CO2 (pCO2) has been investigated in the North Sea, a northwest European shelf sea. Based on a seasonal and high spatial resolution data set the main controlling factors - biological processes and temperature - have been identified and quantified. In the central and northern parts being a CO2- sink all year round, the biological control dominates the temperature control. In the southern part, the temperature control dominates the biological control at an annual scale, since the shallow water column prevents stronger net-CO2 removal from the surface layer due to the absence of seasonal stratification. The consequence is a reversal of the CO2 sea-to- air flux during the spring bloom period, the only time, when CO2 is taken up from the atmosphere in the southern region. Net community production in the mixed layer has been estimated to 4mol Cm−2 yr−1 with higher values (4.3 mol Cm−2 yr−1) in the northern part and lower values in the southern part (2.6 mol Cm−2 yr−1).
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