New understandings of methane dynamics of forest ecosystems using TDLS analyzers

本研究使用TDLS分析仪研究了森林生态系统的甲烷动态。利用涡度相关法、涡度累积法和剖面法，对生态系统尺度甲烷通量及其日、季、年际变化进行了连续监测。同时，采用气室法对森林各组分（湿地、干旱地、树叶、树干等）的甲烷通量进行连续监测，以揭示甲烷的汇/源及其时空变化规律。结果表明，包括湿地在内的森林生态系统甲烷通量的变化范围和波动规律是定量的。这些森林可能是甲烷的来源。

This study examined the methane dynamics of forest ecosystems using TDLS analyzers. By using the eddy covariance, the eddy accumulation, and the profile methods, ecosystem-scale methane flux and its daily, seasonal and inter-annual variation was continuously monitoring. At the same time, methane fluxes of each components in the forest (wetland, dry-upland, foliage, trunk, and so on) were continuously monitored with the chamber method, to reveal the sink/source of methane and their spacio-temporal variations. As a result, range and fluctuation of methane flux of forest ecosystems including wetlands were quantified. These forests can be a methane source.