On the Calibration and Performance of an Instrument for Measuring Total Water Mixing Ratio in Cloud

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  • 1 Division of Cloud Physics, CSIRO, Sydney, Australia
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Abstract

An instrument which measures the total water mixing ratio in cloud has been calibrated to an accuracy of ∼ ±0.1 g kg−1 in the presence of liquid water contents ranging up to 7 g kg−1. Evaporation occurs in a labyrinth of heated plates and the mixing ratio is measured psychrometrically. Close agreement with independent measurements of liquid and vapor content during flights through cloud is demonstrated.

Abstract

An instrument which measures the total water mixing ratio in cloud has been calibrated to an accuracy of ∼ ±0.1 g kg−1 in the presence of liquid water contents ranging up to 7 g kg−1. Evaporation occurs in a labyrinth of heated plates and the mixing ratio is measured psychrometrically. Close agreement with independent measurements of liquid and vapor content during flights through cloud is demonstrated.

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