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open-access-imgOpen AccessTime series of the partial pressure of carbon dioxide (2001–2004) and preliminary inorganic carbon budget in the Scheldt plume (Belgian coastal waters)
Author(s)
Schiettecatte LaureSophie,
Gazeau Frédéric,
van der Zee Claar,
Brion Natacha,
Borges Alberto V.
Publication year2006
Publication title
geochemistry, geophysics, geosystems
Resource typeJournals
A 4‐year time series (2001–2004) of the partial pressure of CO 2 (pCO 2 ) and air‐sea CO 2 fluxes is reported in the Scheldt estuarine plume. This system is oversaturated in CO 2 with respect to the atmosphere, except during the spring phytoplanktonic bloom, and acts as a net source of CO 2 to the atmosphere of 0.7 mol C m −2 yr −1 that represents 7 to 27% of the inner Scheldt estuary CO 2 emission. Results also highlight that a high spatial and temporal coverage of the surface pCO 2 in coastal ecosystems is crucial for reliable estimations of air‐sea CO 2 fluxes. The seasonal variations of pCO 2 seem to be more dominated by biological activities (photosynthesis/respiration) than by temperature change. A stochiometrically linked C/P mass balance budget failed to provide net ecosystem production estimates consistent with the pCO 2 dynamics in this area. It is hypothesized that this discrepancy is related to physiological characteristics of the dominant phytoplanktonic species ( Phaeocystis sp. ) within the studied area. On the basis of a preliminary dissolved inorganic carbon input/output budget, the annual emission of CO 2 toward the atmosphere seems to be largely due to the outgassing of the inputs of CO 2 from the inner Scheldt estuary, rather than due to organic carbon degradation.
Subject(s)atmosphere (unit) , atmospheric sciences , biochemistry , biology , carbon cycle , carbon dioxide , carbon fibers , chemistry , composite material , composite number , dissolved organic carbon , ecology , ecosystem , environmental science , estuary , geography , geology , materials science , meteorology , ocean acidification , oceanography , organic chemistry , outgassing , oxygen , partial pressure , photosynthesis , plume , seawater , total inorganic carbon
Language(s)English
SCImago Journal Rank1.928
H-Index136
ISSN1525-2027
DOI10.1029/2005gc001161

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