| Budget Amount *help |
¥33,670,000 (Direct Cost: ¥25,900,000、Indirect Cost: ¥7,770,000)
Fiscal Year 2015: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2014: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2013: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
Fiscal Year 2012: ¥14,690,000 (Direct Cost: ¥11,300,000、Indirect Cost: ¥3,390,000)
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| Outline of Final Research Achievements |
Various parameters concerning geochemical cycle of carbon such as carbonate system have been observed at coastal station off Shimoda, Shizuoka, Japan for 4 years. Partial pressure of carbon dioxide in the surface layer increased form Oct ot Mar, and decresed from Apr to Sep. Seasonal changes in concentration of organic carbon and photosynthetic production rate indicates that microbial metabolism including microalgae and vertical mixing of water masses are the most important factors causing the seasonal variation of pCO2. The magunitude of seasonal variation in the coastal water was revealed to be higher than those in open ocean by 2 to 3 times, due to high abundance of microbial biomass. Microalgal culture experiments revealed that Chrysochromulina sp. (Haptophyceae) is sensitive to the decrease in pH, indicating the growth of C. sp. will decrease in the acidified condition.
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