Measurement of concentrations of total dissolved inorganic carbon in seawater: improvement of reliability of at-sea analysis
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Accession number;05A1054895
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| Title;Measurement of concentrations of total dissolved inorganic carbon in seawater: improvement of reliability of at-sea analysis |
| Author;
KITADA MIKIO
(Marine Works Japan Ltd., JPN)
KAMATA MINORU
(Marine Works Japan Ltd., JPN)
SHIBATA FUYUKI
(Marine Works Japan Ltd., JPN)
OHAMA TAEKO
(Marine Works Japan Ltd., JPN)
MORO MASAKI
(Marine Works Japan Ltd., JPN)
FUJIKI TOORU
(Marine Works Japan Ltd., JPN)
MURATA AKIHIKO
(Japan Marine Sci. & Technol. Center, JPN)
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Journal Title;Journal of Advanced Marine Science and Technology Society
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Journal Code:L4244A
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ISSN:1341-2752
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VOL.10;NO.1;PAGE.17-27(2004)
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| Figure&Table&Reference;FIG.10, REF.5 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;To detect slight changes of oceanic carbon cycle in response to atmospheric CO2 increase, high precise measurements of oceanic CO2-system properties are necessary. For the purpose, we examined to improve a coulometer (model 5012,UIC), which is generally used to detect a temporal increase of total dissolved inorganic carbon (TCO2) in the ocean. In addition, we produced in-house reference materials (RM), which are traceable to certified reference materials (CRM), to monitor performance of a TCO2 measuring system. For the coulometer improvement, we improved the photometric detection part of a coulometer to minimize variations of light source intensity. The repeatability was improved to be 0.03%(relative standard deviation), which was previously 0.08%. Measurements of RMs showed no statistically significant changes over approx. 2 years. The RM was judged to be useful as a standard for monitoring TCO2, It is also useful for reducing systematic erros of TCO2 values, which are often found in measurements between stations to stations, and cruises to cruises. (author abst.) |
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