Long-term measurements of the CO2 flux from coarse woody debris using an automated chamber system
2005
Jomura, M.(Kobe Univ. (Japan)) | Kominami, Y. | Kanazawa, Y.
The CO2 flux (RCWD) from coarse woody debris (CWD) was measured using an automated chamber system for two years from 2002 to 2003. RCWD showed clear diurnal changes that followed the daily change in surface temperature of CWD. In the short-term, RCWD decreased sharply with increasing water content during rain events and then increased slowly after rain events. In the long-term, RCWD) increased exponentially with temperature and the RCWD in summer was about eight times greater than that in winter. The variation in RCWD at the same temperature was caused by variation in the water content owing to rain events. An exponential function using temperature and a quadratic function using water content explained 85% of the variance in RCWD and reproduced the long-term changes in RCWD caused by temperature and the short-term changes in RCWD caused by water content. RCWD showed diurnal, short-term, and seasonal changes with the temporal trends in temperature and water content.
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