Gattuso J.-P. & Frankignoulle M.,1998. Carbonate chemistry in Bora Bay (Miyako Island, Japan) and carbon cycling in Okinawan reefs. In: International Workshop on CO2 Cycling and Metabolism in Coral Reefs, Kyoto (Japan), 19-20 November 1998.




Abstract

The partial pressure of CO2 (pCO2) in surface water and air-sea CO2 fluxes were measured at Bora Bay (Miyako Island, Japan), a reef that is suspected to behave as a source of CO2. pCO2 was lowest in early afternoon (306-334 µatm) and highest in early morning (451-495 µatm). There was CO2 invasion during part of the daytime and CO2 evasion from late afternoon to late morning. The integrated daily flux was from sea to air (1.7-9.7 mmol CO2 m-2 d-1); it is difficult to interpret due to a stratified water circulation regime. The status of other Okinawan reef flats with respect to qir-sea CO2 flux is discussed. It is concluded that they behave as typical algal-dominated reef flats.


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