Abstract
Carbon dioxide partial pressure (pCO2) has been continuously measured in surface water in Osaka Bay from June to September and in November, 2012, using a moored-equipment which measures temperature, salinity and pH. pCO2 have been also measured monthly for two years at 19 stations in eastern Osaka Bay using a ship. Air to sea CO2 flux were calculated from these data and wind speed measured at Kobe airport. In summer, the CO2 absorption flux was high in the day and low in the night. CO2 flux had large diurnal change by daytime photosynthesis and nighttime respiration. Annual mean CO2 absorption exceeded 0.12 g-C m-2 d-1 in off Kobe area, and was less than 0.09 g-C m-2 d-1 in off Osaka area. As a whole, eastern Osaka Bay absorbs CO2 at a rate of 0.1 g-C m-2 d-1.
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Schedule a callMore From: Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
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