| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Outline of Final Research Achievements |
Nitrate concentrations determined by an ultraviolet specrtophotometer were corrected with data obtained with a conductivity, temperature, and depth profiler (CTD) equipped with turbidity sensor for the better estimation of nitrate in an embayment. Monitoring of nitrate concentration using the spectrophotometer revealed that nitrate concentration becomes high (e.g. >0.07 mM) at the low tide during spring tide.
The red tide developing process was monitored using CTD continuous monitoring and field observation using boats. Red tide occurred in late February during spring tide. Difference in the density of seawater in the water column was not important to develop the population. River discharge might be important to determine the size of the population. Nitrate concentration should be further monitored to clarify the developing process of the red tide. Data obtained with the spectrophotometer is released real time on the web site (http://www.ilt.saga-u.ac.jp/aripro/tower/nutrient.html).
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