Measurement of CO2 Fluxes from Soil and Snow Surfaces with Open Dynamic Chamber Technique.

概要

論文の詳細を見る
Winter soil carbon dynamics is important as a part of the annual carbon budget in seasonally snow-covered ecosystems. To quantify this dynamics, we improved an open dynamic system for precise and continuous measurements of winter CO2 fluxes from the soil and snow surfaces which have been measured by less accurate static chamber techniques and/or discontinuous snow CO2 profile technique. With the devised system, daily trends in CO2 fluxes from the soil and snow surfaces were measured in a cool temperate forest, together with air and soil temperatures, in December 1994 and January 1995. Measured CO2 fluxes from both surfaces showed diurnal, changes, following air temperature and/or soil surface temperature. These fluxes were comparable with those measured by the standard techniques in other cool-temperate forests. This reveals that our improved system can measure in situ winter soil CO2 fluxes, irrespective of the air temperature below 0°C. This successful measurement was attributed to two devices: heater tubing protected air flow in sample gas lines from water vapor freezing, and remote manipulation was able to place chambers on the snowpack without its destruction.
社団法人環境科学会の論文