We describe a Raman-lidar-based approach to acquiring profiles of the relative humidity of air. For this purpose we combined in one instrument the Raman-lidar techniques that are used for the profiling of water vapor and temperature. This approach enabled us to acquire, for the first time to our knowledge, vertical profiles of relative humidity through the entire troposphere exclusively from Raman-lidar data. The methods applied to determining the water-vapor mixing ratio, temperature, and relative humidity and the corresponding uncertainties caused by systematic errors and signal noise are presented. The lidar-derived profiles are compared with profiles measured with radiosondes. Radiosonde observations are also used to calibrate the Raman lidar. Close agreement of the profiles of relative humidity measured with lidar and those measured with radiosonde demonstrates the potential of this novel approach.
© 2002 Optical Society of America
(010.3640) Atmospheric and oceanic optics : Lidar
(010.7030) Atmospheric and oceanic optics : Troposphere
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(290.5860) Scattering : Scattering, Raman
Ina Mattis, Albert Ansmann, Dietrich Althausen, Volker Jaenisch, Ulla Wandinger, Detlef Müller, Yuri F. Arshinov, Sergej M. Bobrovnikov, and Ilya B. Serikov, "Relative-Humidity Profiling in the Troposphere with a Raman Lidar," Appl. Opt. 41, 6451-6462 (2002)