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KMID : 1024520190280090785
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Journal of the Environmental Sciences
2019 Volume.28 No. 9 p.785 ~ p.795
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Sensitivity Analysis (Q10) of Carbon Dioxide Flux with Soil Temperature in the Grassplot
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Kang Dong-Hwan
So Yoon-Hwan
Kwon Byung-Hyuk
Kim Park-Sa
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Abstract
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In order to analyze the sensitivity of carbon dioxide flux by soil temperature in the grassplot, carbon dioxide flux and soil temperature were observed 24 times from March, 2010 to March, 2011 at nine sites in the grassplot. The average of CO2 in the grassplot is 2.2~36.7°C, the highest in August, the lowest in January, and the average of carbon dioxide flux is 12~1479 mgCO2?m-2?hr-1, and the carbon dioxide emission from the grassplot to the atmosphere was 10 times higher in summer than in winter. The temperature response coefficient estimated by the exponential function of carbon dioxide flux according to soil temperature was ranged from 0.1065 to 0.1274, and the increase tendency of CO2 flux with soil temperature was linear at 0~2 0°Cand exponential at 20~40°C. The Q10 values for each of nine observation sites on the grassplot was in the range of 2.901 ~ 3.575, and the Q10 value using the total data observed in the lawn was estimated to be 3.374. In the homogeneous grassplot area, the average of Q10 values by observation point and the Q10 value by the total data were estimated similarly.
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KEYWORD
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Grassplot, Soil temperature, Carbon dioxide flux, Q10
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