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| Katsuyuki Sasaki | |
| Chief of Chemical Oceanography Section, Marine Production Division, | |
| Fisheries Research Agency | |
| National Research Institute of Fisheries Science. | |
| 2-12-4 Fukuura, Kanazawa-ku, Yokohama, 236-0061, Japan | |
| Phone: +81-45-788-7649, FAX: +81-45-788-5001, | |
| E-mail: katusa@fra.affrc.go.jp |
21,481,000 Yen
(FY 2000; 3,328,000 Yen)
We examined the pCO2 in surface water in North Pacific off Sanriku Japan at January, May, August 1997, April 1998, March and November 1999 and the environmental factors such as water temperature (WT), nutrients (nitrate, phosphate and silicate) and carbonic system (total carbon: TC, Alkalinity: TA). The pCO2 was negative relation to WT at January and March, positive to WT at May and August, negative lower 15瀉 and positive above 15瀉 at November and no relation to WT at April. The pCO2 had a good relation to TC at January and August but a bad relation at May. We examined the seasonal change of the same salinity water in order to know the change of the same water. We thought that the pCO2 was decreased by the decrease of TC through diatom blooming from January to May and was more decreased than the expected value with the increase of WT because of TC decrease, the reason of the decrease was unknown. We predicted the change of pCO2 from the change of TC and TA and the error of the prediction was within 10 %.
pCO2 in Surface Seawater, Oyashio, Transition Area, Nutrients, SST, Chlorophyll, Total Carbon, Alkalinity