Soil gas flux measurements are important for improving our understanding of the earth through both research and teaching. They allow faculty and students to gain valuable, hands-on experience with leading research instrumentation and software while studying current issues in soil science. For example, by measuring soil gas flux, students can directly observe the role that soils play in greenhouse gas cycles. Students can also measure how numerous factors affect flux rates, such as vegetation cover, ecosystem type, and treatment effects.
The LEEF program provides a grant to faculty at eligible institutions that partially covers the cost of the packages. Packages include the LI-870 LEEF Soil Survey Package, the LI-7810 LEEF Trace Gas Package, and the LI-8250 Long-Term Soil Flux Package. Each package can be expanded to include other gases as research needs change.
Each package is designed to engage students and faculty in a myriad of different research platforms.
The LI-870 CO2/H2O Gas Analyzer and Smart Chamber can measure soil CO2 flux and concentrations, and its portability means that it can go where your research takes you. Students can map concentrations or fluxes in the field to better understand the spatial variation of soil gas flux.
With the LI-7810 LEEF Trace Gas Package, faculty and students can expand their measurement capabilities to include both CO2 and CH4 soil fluxes. The LI-7810 CH4/CO2/H2O Trace Gas Analyzer teaches students how to record high precision methane concentrations at both the research site and their lab benches. Unlike the LI-870 gas analyzer, the LI-7810 gas analyzer can operate independently from its Smart Chamber. It presents students with a unique ability to explore additional sampling and instrumentation techniques—including long-term atmospheric measurements or even mobile monitoring of methane data.
Multiplexed measurements provide high spatial and temporal resolution of soil gas flux by providing continuous measurements from multiple long-term chambers. Combine the LI-8250 Long-Term Soil Flux Package with one or more LI-COR Trace Gas Analyzers to measure CO2, CH4, and N2O fluxes from soils. With SoilFluxPro™ Software, students can quickly assess data sets and observe how changing key parameters or environmental conditions affect the flux results.
Encompassing field research, data analysis, and reporting, the LI-8250 system can be used for teaching and research exercises simultaneously. The package includes the multiplexer, four opaque chambers, a clear chamber upgrade kit for net carbon exchange measurements, numerous accessories, and SoilFluxPro Software for data analysis. Choose the gas analyzers you want to add based on your research goals.
All three LEEF packages include SoilFluxPro Software. The software acts as both a teaching tool and post-processing software. This lets students see immediate effects when comparing linear and exponential fits to their flux datasets, change key parameters, and perform quality control on these data sets.
The LEEF program’s soil flux packages help introduce learning and teaching opportunities into the classroom, whether it be inside or outdoors. Students gain valuable, hands-on experience by taking measurements then analyzing their data.
For example, they can use LI-COR Trace Gas Analyzers to conduct CO2, CH4 or N2O survey measurements in various ecosystems. By measuring CH4 concentration levels in the atmosphere with the LI-7810 or collecting CO2 gas emitted from the soil below, they learn how to conduct both atmospheric and soil flux research. Students can also study methane concentration differences in wetlands and urban areas, on sloping and flat grasslands, or even under different ecosystem management regimes. Additionally, the Long-Term Soil Flux Package gives them the opportunity to understand different ecosystem variations—such as diurnal and seasonal flux—using long-term data and measurement techniques. Add the LI-7820 N2O/H2O Trace Gas Analyzer to a package to measure nitrous oxide in soil and other applications.
Compatible gas analyzers:
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