6:15 PM - 7:30 PM
[ACG30-P04] In situ measurement of soil carbon monoxide flux in temperate forest
Soil CO flux was observed in Kiryu hydrological study site (KEW), in Shiga Prefecture, Japan. KEW has 55-year-old cypress forests. Priority species of the forest floor is Eurya japonica growing sparsely. CO fluxes between soil surface and the atmosphere were measured using the closed chambers, in which changes in CO concentration during the chamber closure were monitored in-situ with the laser spectrometer. Three chambers were set up in three locations under different soil environment. Also, the soil moisture content and soil temperature in the three plots were measured.
We found a significant absorption of atmospheric CO by soil surface. Focusing on the differences with the plot, less absorption was found in the plot of less humus layer. More CO absorption was observed when the CO concentration of surrounding area was high.