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United States Department of Agriculture

Agricultural Research Service

Research Project: MANAGEMENT OF AGRICULTURAL AND NATURAL RESOURCE SYSTEMS TO REDUCE ATMOSPHERIC EMISSIONS AND INCREASE RESILIENCE TO CLIMATE CHANGE Title: Comparison of buried soil sensors, surface chambers and above ground measurements of carbon dioxide fluxes

Authors
item Xiao, Xinhua -
item Sauer, Thomas
item Horton, Robert -

Submitted to: American Society of Agronomy Meetings
Publication Type: Abstract Only
Publication Acceptance Date: July 15, 2011
Publication Date: N/A

Technical Abstract: Soil carbon dioxide (CO2) flux is an important component of the terrestrial carbon cycle. Accurate measurements of soil CO2 flux aids determinations of carbon budgets. In this study, we investigated soil CO2 fluxes with time and depth and above ground CO2 fluxes in a bare field. CO2 concentrations were measured with time and depth by Vaisala sensors (GMT 220) buried in the soil. Measured CO2 concentrations were used with a gradient method in order to calculate CO2 fluxes with time and depth in the soil. Surface CO2 fluxes were measured directly with eight chambers (Licor 8100-104). An eddy covariance system was installed in the field to measured CO2 flux above ground. CO2 fluxes estimated at different positions will be compared and the three methods will be evaluated.

Last Modified: 11/27/2014
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