Table 1.
Regression functions of soil respiration (Rs) against soil temperature at 10 cm depth.
Figure 1.
Daily mean of soil respiration (Rs), soil temperature at 10 cm depth below ground (Ts), and soil water content at 10 cm depth (VWC) from May to December in 2008.
Figure 2.
Hourly soil respiration (Rs) as a function of soil temperature (Ts) at 10 cm depth below ground.
Data points were from May to December in 2008. Solid curves are fitted curves by equation listed in table 1.
Figure 3.
Comparison of measured hourly soil respiration (Rs) as a fuction of modeled values using logistic and quadratic model for 2008.
Figure 4.
Seasonal relationships between soil respiration (Rs) and soil temperature (Ts) at 10 cm depth and soil water content (VWC) for each month in 2008.
Data points were mean daily values.
Figure 5.
Seasonal sensitivity of soil respiration to soil temperature (Q10).
Data points were derived from exponential regression over monthly time period as shown in figure 4.
Table 2.
Comparison of measured mean soil respiration and corresponding modeled mean derived from the days with no occurrence of missing hourly value over 24-hour time period, and corresponding soil temperature (Ts) and soil moisture (VWC) in 2008.
Figure 6.
Soil respiration (Rs) as a function of soil temperature (Ts) and soil water content (VWC).
Mesh is fitted using logistic-power function in table 3 and right panel is comparison of Rs residuals from logistic-power and logistic functions.
Table 3.
Comparison of combined soil respiration (Rs) model (Logistic-power) with both soil temperature (Ts) (°C) and soil water content (VWC) (m3m−3) as predictors and temperature-only model.