Temperature Sensitivity of Lyman-Alpha Hygrometers
Open Access
- 1 December 1985
- journal article
- Published by American Meteorological Society in Journal of Atmospheric and Oceanic Technology
- Vol. 2 (4) , 656-664
- https://doi.org/10.1175/1520-0426(1985)002<0656:tsolah>2.0.co;2
Abstract
The response of an E.R.C. Lyman-alpha hygrometer to humidity and temperature variations has been experimentally determined in a humidity calibration tunnel. The data are compared to a simple two-gas/two-line model to determine the errors made in atmospheric measurements of humidity variance and flux due to turbulent fluctuations of temperature. The model also was used to study the influence of path length on the hygrometer response. The emission by current Lyman-alpha sources of H2 molecular lines, even in small quantity, can cause temperature sensitivity errors much larger than expected in spectral functions of humidity or mixed humidity-temperature statistics. These errors largely depend on the quality of spectral emission, path length and mean humidity and temperature.Keywords
This publication has 0 references indexed in Scilit: