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第1日　5月15日（水）　15:25～15:45　D会場（202）

1D-O1-1525　　PDF

可搬型マルチターン飛行分析計を用いた土壌起源N₂O, CO₂, CH₄連続同時計測：愛媛大農附属農場におけるフラックス観測

(¹阪大院理・ ²阪大理・ ³愛媛大院農・ ⁴阪大リノ工作・ ⁵北大院農)
^o中山典子¹・ 岩井佑介²・ 当真要³・ 古谷浩志⁴・ 波多野隆介⁵・ 豊田岐聡¹

Soil is one of the major sources of greenhouse gases, such as nitrous oxide (N₂O), methane (CH₄), and carbon dioxide (CO₂), which gases are both generated and consumed during microbial processes in soil. Understanding the soil biological processes and their responses to environmental variations are quite important for better global flux estimation and a simultaneous and continuous monitoring of these soil gases should provide the better understanding. In this study, a multi-turn time-of-flight mass spectrometer (MULTUM) system combined with an automated gas flux chamber system was developed for the simultaneous and continuous quantification of soil gases in a few minutes. To demonstrate the utility of the system, we conducted a field study at the Ehime University farm (Ehime, Japan). Hourly continuous flux measurement had been continued for a week almost without operators except for a daily system check, which enabled collection of large number of continuous soil gas measurements with substantially reduced labor compared to traditional methods.