Scientific Results

Eddy correlation measurements of methane fluxes from Italian rice paddy fields

Year: 1999

Authors: Werle Peter

Autors Affiliation: Fraunhofer Inst for Atmospheric, Environmental Research, Garmisch-Partenkirchen, Germany

Abstract: A fast diode laser sensor has been applied for micrometeorological flux measurement of methane emissions from rice paddy fields in order to assess the quality of data on methane fluxes and allow a comparison with simultaneously recorded data provided by the closed chamber method. Systematic differences between chamber and the eddy correlation technique have been found as closed chamber measurements report about 70% higher emissions than eddy correlation measurements. This demonstrates that diode laser spectroscopy is a valuable tool for quality assurance in atmospheric research.

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KeyWords: Gas emissions; Measurements; Methane; Optical sensors; Spectroscopy, Closed chamber method; Diode laser sensor; Diode laser spectroscopy; Eddy correlation; Micrometeorological flux measurement, Semiconductor lasers
DOI: 10.1117/12.366467

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