Re-evaluation of coastal CO2 exchange rate using newly developed method of near water surface trublulence

Research Project

Project/Area Number	25820259
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Multi-year Fund
Research Field	Civil and environmental engineering
Research Institution	Port and Airport Research Institute
Principal Investigator	Tokoro Tatsuki 国立研究開発法人港湾空港技術研究所, その他部局等, 研究官 (70543859)
Project Period (FY)	2013-04-01 – 2016-03-31
Project Status	Completed (Fiscal Year 2015)
Budget Amount *help	¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000) Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000) Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords	CO2 / 沿岸域 / 大気―水圏間フラックス
Outline of Final Research Achievements	Coastal areas have recently been focused as an important carbon stock which is isolated from atmosphere for long period. However, the CO2 flux in such areas could not be quantified sufficiently due to the temporal and spatial large variation. In this study, we aimed to develop the measurement system of the CO2 transfer velocity using the aqueous turbulence near the water surface. By the procedure deduced from our water-tank experiment, the system could measure the CO2 transfer velocity with satisfactory accuracy under low-wave condition in the open field. This study also suggested that the measurement system would be applicable to the high-wave condition with the future improvement.