Quantitative evaluation of effect of subsurface warming on production and consumption of greenhouse gases

2015 Fiscal Year Final Research Report

• Project/Area Number: 26889015
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Geotechnical engineering
• Research Institution: Saitama University
• Principal Investigator: SAITO Takeshi 埼玉大学, 理工学研究科, 助教 (30735668)
• Project Period (FY): 2014-08-29 – 2016-03-31
• Keywords: 地下温暖化 / 温室効果ガス / 二酸化炭素 / フラックス / 定量的評価

Outline of Final Research Achievements

The objective of this study was to evaluate quantitatively effect of subsurface temperature increase on production and consumption of carbon dioxide (CO2) as one of greenhouse gases. The CO2 fluxes from soil surface and in soil were monitored by using combined techniques of a closed-chamber method and measurement of soil gas concentration in the unsaturated zone with laboratory experiment of gas diffusivity for soil core samples. Results show that approximately 90% of the soil surface CO2 flux was produced at the shallow part of soil. The CO2 flux might also have a moderate positive correlation with the subsurface temperature near the soil surface.

Free Research Field

地盤環境工学