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ESTIMATION AND MINIMISATION OF ERRORS OF SOIL RESPIRATION
MEASUREMENT USING OPEN SCHEME
© 2009 F.A. Tatarinov1, A.G. Molchanov2 , A.V. Oltchev1
1
Severtsov Institute of Ecology and Evolution Problems of Russian Academy of Sciences, Moscow,
Russia; e-mail: [email protected]
2
Institute of Forestry of Russian Academy of Sciences, Uspenskoye, Moscow region, Russia
The analytical and experimental estimation of error of chamber measurements of soil respiration using open scheme,
caused by the air infiltration into the chamber from soil due to the difference in air pressure inside the chamber and in
ambient air. This error may lead to the significant overestimation of measured soil respiration. It was obtained that the air
infiltration from soil decreases hyperbolically under decreasing difference of air pressure inside and outside of chamber.
Within the frame of the study the pressure difference was regulated by the increase of the area of chamber inlets. The
estimation of minimal inlets area under the given air flux necessary for the correct soil respiration measurement with open
scheme was obtained.
Key words: CO2 emission, soil respiration, chamber methods, open path.
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