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Título: | Prevalence of strong vertical CO2 and O2 variability in the top meters of the ocean |
Autor: | Calleja, Maria Ll. CSIC ORCID; Duarte, Carlos M. CSIC ORCID; Álvarez-Rodríguez, Marta CSIC ORCID; Vaquer-Sunyer, Raquel CSIC ORCID ; Agustí, Susana CSIC ORCID; Herndl, Gerhard J. | Fecha de publicación: | 2013 | Editor: | American Geophysical Union | Citación: | Global Biogeochemical Cycles 27(3): 941-949 (2013) | Resumen: | The gradient in the partial pressure of carbon dioxide (pCO2) across the air-sea boundary layer is the main driving force for the air-sea CO2 flux. Global data bases for surface seawater pCO2 are actually based on pCO2 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 pCO2, 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 pCO2 of 13 ± 1 μatm. Temperature gradients accounted for only 11% of this pCO2 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 pCO2 variability. Observations of pCO2 just beneath the air-sea boundary layer should be further investigated in order to estimate possible biases in calculating global air-sea CO2 fluxes. Key Points High pCO2 vertical variability within the upper meters of the ocean surfaceOnly 11% of pCO2 variability appears to be explained by temperature changesBiological processes exert a control in the observed CO2 vertical heterogeneity ©2013. American Geophysical Union. All Rights Reserved. | Versión del editor: | http://dx.doi.org/10.1002/gbc.20081 | URI: | http://hdl.handle.net/10261/86802 | DOI: | 10.1002/gbc.20081 | Identificadores: | doi: 10.1002/gbc.20081 issn: 0886-6236 |
Aparece en las colecciones: | (IACT) Artículos (IMEDEA) Artículos |
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Calleja-GBC-2013-v27-n3-p941.pdf | 743,29 kB | Adobe PDF | Visualizar/Abrir |
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