From idea to understanding, LI-COR has your soil gas flux research covered. No other solution is as flexible or delivers the same level of proven hardware, gas analyzers, and advanced data analysis software.Get a Quote
LI-COR survey systems allow for rapid surveying of fluxes of your soil gas of interest. These systems pair the Smart Chamber with a gas analyzer to measure a variety of gas species with gas flux, GPS, and ancillary data all provided in one file.
LI-COR offers hardware, software, and analyzers that are based on extensive scientific research and testing. Patented designs minimize disruption of natural soil gas transport across the soil surface and record high-precision flux measurements to evaluate spatial and temporal variability.
Together, this integrated system provides an entirely comprehensive research solution for measuring large- and small-scale events—including CO2, CH4, or N2O greenhouse gas emissions.
LI-COR soil gas flux systems combine more than 20 years of experience with the latest innovations for flexibility and convenience.
Each LI-COR gas analyzer is portable, durable, and simple to deploy—allowing you to take CO2, CH4, and N2O survey and long-term measurements with ease.
The importance of soil gas flux chambers to take accurate measurements is often underestimated. An inherent challenge to chamber design is the influence the chamber may have on measurements.
All LI-COR chambers are designed to minimize chamber interference on the natural soil gas flux, and gas production and consumption, leading to accurate, consistent measurements.
The perforated base of LI-COR long-term chambers allows for the natural exchange of gas, sunlight, and precipitation between the atmosphere and soil surrounding the chamber, minimizing the effect of the deployment of soil chambers.
Any difference between the air pressure inside a soil chamber and ambient air will affect the flux rate. If the chamber is not properly vented, under windy conditions the Venturi effect can cause a mass flow of air from the soil into the chamber, leading to significant overestimation of soil gas flux.
To maintain pressure equilibrium, all LI-COR soil chambers feature a patented pressure vent.
Any soil disturbance can artificially influence natural gas fluxes. LI-COR chambers are placed over soil collars that are inserted before measuring. An automated mechanism seals the chamber around the collar. Because the chamber never touches the collar directly, any soil disturbance is negligible and fluxes are minimally affected.
Once the chamber is placed over the collar, increasing gas concentrations reduce the gas diffusion gradient—suppressing the efflux. A linear regression will lead to a significant flux underestimation, particularly in porous soil.
LI-COR uses an exponential function to account for the altered diffusion gradient to estimate flux at the time of chamber closing—when gas concentration is nearest to ambient levels.
Air mixing is critical for accurate flux measurement, but fans create pressure gradients within the chamber that may suppress or enhance flux.
All LI-COR soil chambers are designed without fans and mixing is achieved through a bowl-shaped chamber and air inlet/outlet positioning.
SoilFluxPro Software simplifies the management and processing of large soil gas flux datasets. SoilFluxPro is a powerful, free software included with all LI-COR soil gas flux solutions to view, revise, and recompute flux data, to perform quality assurance and quality control, and much more.
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