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2034673 
Journal Article 
Estimation of Potential Source Region in Northeast Asia through Continuous In-Situ Measurement of Atmospheric CO2 at Gosan, Jeju Island, Korea 
Jin, F; Kim, J; Kim, KR 
2010 
1 
Terrestrial, Atmospheric and Oceanic Sciences
ISSN: 1017-0839
EISSN: 2311-7680 
21 
2 
313-323 
WOS:000277965300008 
High-Precision (+/- 0.1 ppm), high-frequency (hourly averaged) measurement of atmospheric carbon dioxide (CO2) was made at Gosan Station on Jeju Island, Korea, using a Non-dispersive Infrared (NDIR) analyzer calibrated with National Oceanic and Atmospheric Administration/Earth System Research Laboratory standards. This paper presents the one-year results from these measurements, including discussions on data quality control and data selection, data characteristics through comparing with other regional data and on the techniques for estimating potential source regions of pollution emissions in Northeast Asia with pollution events in the record. Comparisons of the continuous monitoring data with independent flask measurements at Gosan show good correlation in overall trend. In addition, the continuous monitoring data show signals of extreme pollution and sink episodes which are difficult to monitor in discrete flask measurements, showing the importance of continuous measurements. The CO2 concentrations of "representative data" at Gosan, derived by the statistical pollution identification procedure, show strong seasonality similar to those of other background observatories in the middle-to-high Northern Hemisphere. The amplitude of the seasonal variation at Gosan is approximately 16 ppm, similar to high-latitude Northern Hemisphere marine sites such as Ryori and Point Barrow stations. A hybrid receptor model was applied to the "regional pollution events", a statistically extracted subset of the data with a high probability of being influenced by regional pollution for understanding the distribution and strengths of the major CO2 pollution sources in the Northeast Asia region. Results indicate strong potential source areas around the Yangtze River region including Shanghai and the Huabei plain including Beijing of China, as well as the Korean peninsula including Seoul contributing to pollution events observed at Gosan. The methodologies and results describe our continuing efforts in establishing a "top-down" estimation of greenhouse gas emissions in the Northeast Asia region, important for scientific validation and monitoring of anthropogenic CO2 emissions from the active industrial development in this region. 
Carbon dioxide; Continuous in-situ monitoring; Gosan; Northeast Asia; Pollution emission; Top-down model