Articles | Volume 8, issue 10
Research article
27 Oct 2015
Research article |  | 27 Oct 2015

The stability and calibration of water vapor isotope ratio measurements during long-term deployments

A. Bailey, D. Noone, M. Berkelhammer, H. C. Steen-Larsen, and P. Sato


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Short summary
This study evaluates the long-term stability of concentration-dependent and drift-induced biases in three water vapor isotopic analyzers deployed at two remote field sites. Despite limited data at low humidity and measurement hysteresis, inaccuracies in the concentration-dependence characterization are small, and the bias shows no change with isotope ratio or directional drift. Changes in measurement repeatability that are not characterized by linear drift estimates are a larger source of error.