Although there are other physical processes that play a role in soil respiration, CO2 movement or CO2 flux out of the soil is the primary function of soil respiration. Soil CO2 flux is a significant component of the total atmospheric carbon balance, and it is a very important variable in any study of global climate change. Soil respiration is also a strong indicator of the biological health and vigor of a soil and is an excellent tool to evaluate the efficacy of bioremediation efforts and the impact of changing agricultural practices.
LI-COR's research in this area has resulted in better comprehension of soil CO2 flux measurement problems and system design requirements. Production of CO2 in the soil is influenced by environmental factors (soil temperature, soil moisture, etc.) and biological factors (above ground canopy size and growth, etc.). Soil CO2 efflux is a physical process driven primarily by the CO2 concentration diffusion gradient between the upper soil layers and the atmosphere near the soil surface. The measurement challenge is to provide an accurate tool which causes minimal disturbance to environmental conditions that have an impact on CO2 production and transport within the soil profile. LI-COR has designed automated soil CO2 flux chambers to be used across a wide range of environmental conditions that minimize environmental perturbations.
- Soil CO2 Flux Measurements: Addressing Spatial Variability: Determining the Number of Readings Required
LI-COR Instruments for Measuring Soil CO2 flux:
- Measures CO2 exchange from soils
- Multiplexed configuration available for larger sampling area
- Useful for survey or long-term measurements