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| Titel |
Controls of the surface water partial pressure of CO2 in the North Sea |
| VerfasserIn |
H. Thomas, Y. Bozec, K. Elkalay, H. J. W. Baar, A. V. Borges, L.-S. Schiettecatte |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 2, no. 4 ; Nr. 2, no. 4 (2005-11-15), S.323-334 |
| Datensatznummer |
250000634
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| Publikation (Nr.) |
 copernicus.org/bg-2-323-2005.pdf |
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| Zusammenfassung |
| 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 4 mol C m-2 yr-1 with higher
values (4.3 mol C m-2 yr-1) in the northern part and lower values
in the southern part (2.6 mol C m-2 yr-1). |
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