1998 Fiscal Year Final Research Report Summary
Development of Compact CO_2 Monitoring System in the Coastal Area.
| Project/Area Number |
08558057
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KAYANNE Hajime Department of Geography, the University of Tokyo, Associate Professor, 大学院・理学系研究科, 助教授 (60192548)
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| Co-Investigator(Kenkyū-buntansha) |
SAITO Hiroshi National Research laboratory of Metrology, 計量研究所, 主任研究官
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| Project Period (FY) |
1996 – 1998
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| Keywords | CO_2 / coastal zone / monitoring |
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| Research Abstract |
We have tested the system in the field : Ishigaki Island, the southwest Ryukyus. The system introduces a gas permeable membrane tube as the equilibrator with NDIR for measurement. It has been succeeded in reducing size, weight and power consumption : 30kg, 50x50x50cm and 300W.The stability of the system is less than *5 ppm within a range of 0 to 1000 ppm, which is enough for coastal zone monitoring where a large change in CO_2 occurrs. We compared the system with a static mixer/bubble type equilibrator. The measured CO_2 values differed with each other as much as 20 ppm. This discrepancy resulted from the changes in pressure inside the equilibrator of static mixer/bubble type by swing of the boat. Our system with a membrane equilibrator is more stable. Through the 3-year research, the development of a compact CO_2, monitoring system has been succeeded for its basic designation and practical test. We continue to brush up this system to be more widely used one.
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[Publications] Kayanne, H., Kudo, S., Hata, H., Nozaki, K., Kato, K., Negishi, A., Saito, H., Akimoto, F.and Kimoto, H.: "Continuous monitoring system for pCO_2, total alkalinity and total inorganic carbon to evaluate net CO_2 flux of the coastal area." International Workshop on CO_2 Cycling and Metabolism in Coral Reef, 19,20 November (1998), Kyoto. 85-87
Description
「研究成果報告書概要(欧文)」より
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[Publications] Kayanne, H., Kudo, S., Hata, K., Nozaki, K., Kato, K., Negishi, A., Saito, H.and Akimoto, F.: "Monitoring system for changes in coral reef water pCO2 and community metabolism." Extended Abstract of 2nd Int.Symp.CO2 in the Oceans, Tsukuba, January. 22-09 (1999)
Description
「研究成果報告書概要(欧文)」より
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[Publications] Nozaki, K., Kimoto, H., Kudo, S., Kato, K., Negishi, A.and Kayanne, H.: "Development of continuous monitoring system for total inorganic carbonate and alkalinity in seawater and its application to coral reef." Extended Abstract of 2nd Int.Symp.CO2 in the Oceans, Tsukuba, January. P-22 (1999)
Description
「研究成果報告書概要(欧文)」より
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[Publications] Saito, H., Kimoto, H., Nozaki, K., Kato, K., Negishi, A.and Kayanne, H.: "Comparative experiment of pCO2 measuring instrument in coral reef environment." Extended Abstract of 2nd Int.Symp.CO2 in the Oceans, Tsukuba, January. P-25 (1999)
Description
「研究成果報告書概要(欧文)」より
