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http://dx.doi.org/10.5467/JKESS.2012.33.1.32

An Estimation of Mean Background Concentrations of Greenhouse Gases Observed on Ulleungdo  

Lim, Yun-Kyu (Department of Environmental Education, Korea National University of Education)
Moon, Yun-Seob (Department of Environmental Education, Korea National University of Education)
Kim, Jin-Seog (Cent for gas analysis, Korea Research Institute of Standards and Science)
Song, Sang-Keun (Division of Earth Environmental System, Pusan National University)
Hong, Ji-Hyung (Atmospheric Engineering Research Division, National Institute of Environmental Research)
Publication Information
Journal of the Korean earth science society / v.33, no.1, 2012 , pp. 32-38 More about this Journal
Abstract
Mean background concentrations of greenhouse gases such as $CO_2$ and $CH_4$ were estimated on Ulleungdo using PICARRO Cavity Ring-Down Spectroscopy (CRDS) analyzer. To improve the accuracy of $CO_2$ and $CH_4$ concentrations, a standardized QA${\cdot}$QC (Quality Assurance Quality Control) procedure was employed with three steps: 1) the inspection procedure of physical limitation (e.g. the exclusion of data corresponding to the number of data of ${\leq}$50%) for hourly mean values, 2) a stage inspection (e.g. the use of data corresponding to ${\geq}15$ observations per day) for daily mean values, and 3) a fast fourier transform (FFT) analysis using curve-fitting methods for the investigation of climatic characteristics. The monthly mean concentrations of $CO_2$ and $CH_4$ derived from three-step QA${\cdot}$QC procedure were then compared with those observed at Anmyundo (Korea) and Ryori (Japan). Overall, the error of mean $CO_2$ and $CH_4$ concentrations estimated in this study distinctly decreased. However, in comparison with their concentrations monitored at Ryori, the $CO_2$ concentration at estimated at Ulleungdo is soemwhat lower than that of Anmyundo due to the missing data, which is statistically significant. On the other hand, the former has a statistically significant higher value of $CH_4$ that of the latter.
Keywords
greenhouse gas; FFT; QA${\cdot}$QC;
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