Boundary-Layer Water Vapor Probing with a Solar-Blind Raman Lidar: Validations, Meteorological Observations and Prospects

Abstract

The ability of a solar-blind Raman lidar (SBRL) to measure the vertical profile of water vapor in the boundary layer is proved from a theoretical as well as an experimental point of view. Theoretical calculations show that the SBRL is well suited to boundary-layer measurements and that its performance in this domain can be compared with that of the Differential Absorption Lidar (DIAL). Validation of a 266 nm-Raman lidar is experimentally achieved by comparing it with ground measurements, radio-soundings, and other Raman lidar emitting at 347 nm. Several cases of diurnal and nocturnal evolution of the boundary layer are studied by using the SBRL in conjunction with conventional meteorological instruments. Finally, different ways of using Raman lidar (at ground level or in aircraft) are analyzed.