Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Sensitivity Analysis (Q10) of Carbon Dioxide Flux with Soil Temperature in the Grassplot

잔디밭에서 지온에 대한 이산화탄소 플럭스의 민감도(Q10) 분석

  • Kang, Dong-hwan (Environmental Research Institute, Pukyong National University) ;
  • So, Yoon Hwan (Environmental Research Institute, Pukyong National University) ;
  • Kwon, Byung Hyuk (Department of Environmental Atmospheric Sciences, Pukyong National University) ;
  • Kim, Park Sa (Department of Environmental Atmospheric Sciences, Pukyong National University)
  • Received : 2019.07.20
  • Accepted : 2019.09.09
  • Published : 2019.09.30
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Abstract

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 $CO_2$ in the grassplot is $2.2{\sim}36.7^{\circ}C$, the highest in August, the lowest in January, and the average of carbon dioxide flux is $12{\sim}1479mgCO_2{\cdot}m^{-2}{\cdot}hr^{-1}$, 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 $CO_2$ flux with soil temperature was linear at $0{\sim}20^{\circ}C$ and exponential at $20{\sim}40^{\circ}C$. The $Q_{10}$ values for each of nine observation sites on the grassplot was in the range of 2.901 ~ 3.575, and the $Q_{10}$ value using the total data observed in the lawn was estimated to be 3.374. In the homogeneous grassplot area, the average of $Q_{10}$ values by observation point and the $Q_{10}$ value by the total data were estimated similarly.

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References

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