期刊
GEOPHYSICAL RESEARCH LETTERS
卷 44, 期 24, 页码 12324-12330出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2017GL075797
关键词
extracellular carbonic anhydrase; sea surface microlayers; air-sea CO2 exchange; enrichment; Indo-West Pacific; cyanobacteria
资金
- European Research Council (ERC) [GA336408]
This paper describes the quantification of extracellular carbonic anhydrase (eCA) concentrations in the sea surface microlayer (SML), the boundary layer between the ocean and the atmosphere of the Indo-West Pacific. We demonstrated that the SML is enriched with eCA by 1.50.7 compared to the mixed underlying water. Enrichment remains up to a wind speed of 7ms(-1) (i.e., under typical oceanic conditions). As eCA catalyzes the interconversion of HCO3- and CO2, it has been hypothesized that its enrichment in the SML enhances the air-sea CO2 exchange. We detected concentrations in the range of 0.12 to 0.76nM, which can enhance the exchange by up to 15% based on the model approach described in the literature.
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