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  • Precipitation Decreases Methane Uptake in a Temperate Deciduous Forest
  • Khokhar, Nadar Hussain;Park, Jae-Woo;
  • Department of Civil and Environmental Engineering, Hanyang University;Department of Civil and Environmental Engineering, Hanyang University;
  • 온대 낙엽 활엽수림에서의 강수량에 따른 메탄 흡수 감소
  • 나다르 후세인 코카르;박재우;
  • 한양대학교 건설환경공학과;한양대학교 건설환경공학과;
Abstract
Soil moisture regulates the fate of methane (CH4) in forest soil via biological and chemical processes. The instant effect of variable precipitation on CH4 uptake is, however, unclear in the forest ecosystems. Here, we measured CH4 flux in a temperate forest soil immediately after variable volume of water applications equivalent to 10, 20 40, and 80mmm2day1 precipitation. CH4 uptake was significantly higher when the water was not applied. The CH4 uptake decreased significantly with increasing water application. CH4 uptake was linked with air filled porosity and water filled porosity. CH4 uptake response to actual precipitation intensity was in agreement with CH4 uptake results in this study. CH4 uptake decreased 55% at highest precipitation intensity. Since annual CH4 flux is calculated with interpolation of weekly or biweekly field observations, instant effect of precipitation can mislead the interpolated annual results.

Keywords: Methane;precipitation;intensity;temperate forest;uptake;

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