2012 Fiscal Year Final Research Report

Analysis of the relationship of ecosystem evapotranspiration and methane emission over the lowland evergreen forest under the tropical monsoon climate

Research Project

Project/Area Number	22681003
Research Category	Grant-in-Aid for Young Scientists (A)
Allocation Type	Single-year Grants
Research Field	Environmental dynamic analysis
Research Institution	Forestry and Forest Products Research Institute
Principal Investigator	SHIMIZU Takanori 独立行政法人森林総合研究所, 水土保全研究領域, 主任研究員 (40353726)
Project Period (FY)	2010 – 2012
Keywords	熱帯モンスーン気候 / 低地常緑林 / 乱流変動法 / メタン交換量 / 水蒸気交換量
Research Abstract	Fluxes of methane and water vapor were measured applying eddy covariance method over a lowland evergreen forest in the southeastern Asia under the tropical monsoon climate. In the rainy season, the diurnal variation of methane flux was not clearly observed, but the daily mean indicated the slight emission of methane from the forest ecosystem. In the dry season, the distinct methane absorption into the ecosystem was shown from the calculated flux in the daytime. For both seasons, the diurnal trends of methane flux were not corresponding to those of water vapor flux: The result suggested that the transpiration from the trees was not a motive force of methane emission, at least at the lowland evergreen forest.