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An open path, fast response infrared absorption gas analyzer for H2O and CO2

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Abstract

An open path infrared absorption based instrument for fast response measurements of H2O and CO2 fluctuations is described. This instrument performed reliably in several field experiments in both terrestrial and marine environments, on both fixed (tower) and mobile (boat, plane) flux platforms. Noise levels for H2O and CO2 concentrations were less than 10 mg/m3 and 300 Μg/m3, respectively for frequencies between 0.005 and 10 Hz. Drifts in instrument output, associated with changes in instrument temperature, are compensated for electronically.

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Auble, D.L., Meyers, T.P. An open path, fast response infrared absorption gas analyzer for H2O and CO2 . Boundary-Layer Meteorol 59, 243–256 (1992). https://doi.org/10.1007/BF00119815

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