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Prevalence of stron...
Prevalence of strong vertical CO2 and O-2 variability in the top meters of the ocean
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Calleja, Maria Ll. (author)
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Duarte, Carlos M. (author)
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Alvarez, Marta (author)
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- Vaquer-Sunyer, Raquel (author)
- Lund University,Lunds universitet,Kvartärgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Quaternary Sciences,Department of Geology,Faculty of Science
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Agusti, Susana (author)
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Herndl, Gerhard J. (author)
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(creator_code:org_t)
- 2013-09-13
- 2013
- English.
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In: Global Biogeochemical Cycles. - : American Geophysical Union (AGU). - 0886-6236. ; 27:3, s. 941-949
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http://dx.doi.org/10...
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Abstract
Subject headings
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- The gradient in the partial pressure of carbon dioxide (pCO(2)) across the air-sea boundary layer is the main driving force for the air-sea CO2 flux. Global data bases for surface seawater pCO(2) are actually based on pCO(2) measurements from several meters below the sea surface, assuming a homogeneous distribution between the diffusive boundary layer and the upper top meters of the ocean. Compiling vertical profiles of pCO(2), temperature, and dissolved oxygen in the upper 5-8 m of the ocean from different biogeographical areas, we detected a mean difference between the boundary layer and 5 m pCO(2) of 131 mu atm. Temperature gradients accounted for only 11% of this pCO(2) gradient in the top meters of the ocean; thus, pointing to a heterogeneous biological activity underneath the air-sea boundary layer as the main factor controlling the top meters pCO(2) variability. Observations of pCO(2) just beneath the air-sea boundary layer should be further investigated in order to estimate possible biases in calculating global air-sea CO2 fluxes.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
Keyword
- pCO2 variability
- top meters
- temperature
- oxygen concentration
- oceans
Publication and Content Type
- art (subject category)
- ref (subject category)
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