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Dimensioning IRGA gas sampling systems: laboratory and field experiments

by Unité de recherche TERRA [Gembloux] ; Gembloux Agro-Bio Tech [Faculté universitaire des sciences agronomiques de Gembloux] ([FUSAGx]) ; Université de Liège = University of Liège = Universiteit van Luik = Universität Lüttich (ULiège)-Université de Liège = University of Liège = Universiteit van Luik = Universität Lüttich (ULiège) , Cousin, Julien , Interactions Sol Plante Atmosphère (UMR ISPA) ; Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro) , De ligne, Anne , Decarpenterie, Thomas , Ecologie et Ecophysiologie Forestières [devient SILVA en 2018] (EEF) ; Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL) , Groupe de spectrométrie moléculaire et atmosphérique (GSMA) ; Université de Reims Champagne-Ardenne (URCA)-Centre National de la Recherche Scientifique (CNRS) , Chopin, Henri , Joly, Lilian , Loustau, Denis , Aubinet, Marc , Chauvin, Nicolas , Gross, Patrick

in Analyzers / Attenuation / Calibration / Covariance / Earth sciences & physical geography / Eddy covariance / Eddy covariance technique / Experiments / Field tests / Filters / Flow rates / Flow velocity / Frequency dependence / Frequency response / Gas analyzers / Gas sampling / Gases / Gaz sampling systems / GSSs / Impact tests / Infrared analysis / Infrared gas analyzers / IRGAs / Laboratories / Life Sciences / Limiting factors / Physical, chemical, mathematical & earth Sciences / Physique, chimie, mathématiques & sciences de la terre / Pressure / Pressure drop / Rain / Sampling / Sciences de la terre & géographie physique / Sensors

2016

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Dimensioning IRGA gas sampling systems: laboratory and field experiments

2016

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Dimensioning IRGA gas sampling systems: laboratory and field experiments

2016

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Journal Article

Dimensioning IRGA gas sampling systems: laboratory and field experiments

Unité de recherche TERRA [Gembloux] ; Gembloux Agro-Bio Tech [Faculté universitaire des sciences agronomiques de Gembloux] ([FUSAGx]) ; Université de Liège = University of Liège = Universiteit van Luik = Universität Lüttich (ULiège)-Université de Liège = University of Liège = Universiteit van Luik = Universität Lüttich (ULiège),

Cousin, Julien,

Interactions Sol Plante Atmosphère (UMR ISPA) ; Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro),

De ligne, Anne,

Decarpenterie, Thomas,

Ecologie et Ecophysiologie Forestières [devient SILVA en 2018] (EEF) ; Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL),

Groupe de spectrométrie moléculaire et atmosphérique (GSMA) ; Université de Reims Champagne-Ardenne (URCA)-Centre National de la Recherche Scientifique (CNRS),

Chopin, Henri,

Joly, Lilian,

Loustau, Denis,

Aubinet, Marc,

Chauvin, Nicolas,

Gross, Patrick

2016

Overview

Both laboratory and field experiments were carried out in order to define suitable configuration ranges for the gas sampling systems (GSSs) of infrared gas analyzers (IRGAs) used in eddy covariance measurements. In the laboratory, an original dynamic calibration bench was developed in order to test the frequency attenuation and pressure drop generated by filters. In the field, three IRGAs of the same type equipped with different filters or different rain caps were installed and run and the real frequency response of the complete setup was tested. The main results are as follows. – Filters may have a strong impact on the pressure drop in the GSS and this impact increases with flow rate. – Conversely, no impact of the tested filters on cutoff frequency was found, GSSs with and without filters presenting similar cutoff frequencies. – The main limiting factor of cutoff frequency in the field was found to be the rain cap design. In addition, the impact of this design on pressure drop was also found to be noteworthy.

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Publisher

European Geosciences Union,CCSD,Copernicus GmbH,Copernicus,Copernicus Publications

Subject

/ Earth sciences & physical geography

/ Eddy covariance

/ Eddy covariance technique