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KMID : 1024520080170121353
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Journal of the Environmental Sciences
2008 Volume.17 No. 12 p.1353 ~ p.1361
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Delayed Mode Quality Control of Argo Data and Its Verification in the Pacific Ocean
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Yang Joon-Yong
Suk Moon-Sik
Suh Young-Sang
Go Woo-Jin
Seo Jang-Won
Kang Seong-Yun
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Abstract
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Quality control of Argo(Array for Real-time Geostrophic Oceanography) data is crucial by reason that salinity measurements are liable to experience some drift and offset due to biofouling, contamination of sensor and wash-out of biocide. The automated Argo real-time quality control has a limit of sorting data quality, so that WJO program is adopted as standardized method of Argo delayed mode quality control (DMQc) in the world that is a precise quality control method. We conducted DMQC on pressure, temperature and salinity measured by Argo floats in the Pacific Ocean including expert evaluation. Particularly, salinity data were corrected using WJO program. 4 salinity profiles of Argo delayed mode were compared with nearby in situ CTD data and other Argo data in deep layer where oceanographic conditions are stable in time and space. The differences of both salinities were lower than target accuracy of Argo. As compared with the difference of salinities before DMQC, those after DMQC decreased by 60-80 percent. Quality of delayed mode salinity data seemed to be improved correcting salinity data suggested by WJO program.
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KEYWORD
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Argo, Pacific Ocean, Delayed mode, Quality control, WJO program
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