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KMID : 1024520170260020147
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Journal of the Environmental Sciences
2017 Volume.26 No. 2 p.147 ~ p.157
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Vertical Variations Analysis of Air Temperature and CO2 Concentration in the Grassplots
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So Yoon-Hwan
Kang Dong-Hwan
Kim Il-Kyu
Kim Byung-Woo
Yoon Hwan-Jin
Kim Si-Hyeon
Son Yong-Seok
Shin Jung-Hyeon
Ahn Jeong-Woo
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Abstract
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This study investigated the characteristics of variations in carbon dioxide concentration and air temperature with the vertical change of surface in a grassplot. Field observations were carried out at a grassplot in Gyeongnam Science High School, over four days in August and November, 2015. Continuous observation equipment (GMP343, VAISALA) was installed at the LP (0.1 m from the surface) and UP (1.1 m from the surface) points, and the carbon dioxide concentration and air temperature were measured simultaneously at 1-min intervals. To summarize the results of the observation, August had higher than average concentrations of carbon dioxide, while November showed average air temperatures. Moreover, the concentration of carbon dioxide was higher at the UP point, while the air temperature was higher at the LP point. The correlation coefficient of carbon dioxide concentration between the UP and LP points was 0.80 in August across all the four days, while it was higher in November at 0.58-0.95. The results of the regression analysis of carbon dioxide concentration with air temperature changes for both August and November showed a distinct change at the LP point (R2=0.36-0.76), as compared to the UP point (R2=0.1-0.57). Between the UP and LP points, the carbon dioxide concentration and air temperature regression analysis results indicated that an active exchange was taking place between the two points.
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KEYWORD
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Grassplot, Carbon dioxide concentration, Air temperature, Vertical variation
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