Water vapor vertical profile by Raman lidar in the free troposphere from the Jungfraujoch Alpine Station

摘要: The water vapor content in the atmosphere is an important criteria for validation of predictive results obtained from global scale atmospheric models. Due to its non-homogeneous distribution troposphere, both space and time, may still be considered today as largest uncertainty our understanding earth radiation budget. This paper presents new by Raman lidar measurements one attractive method long-term continuous observation atmosphere. A powerful pulsed laser beam at 355 nm emitted inelastic back-scatter signals (Raman shift) nitrogen are recorded respectively. ratio between shifted wavelength 408nm 387nm gives a first estimate relative mixing with good vertical resolution. absolute profiles retrieved using additional situexternal reference value directly local meteorological station. system, operated altitude 3′580 m above see level Swiss Alpine region Jungfraujoch research station, presented, two typical clear sky cloudy conditions discussed compared radio sounding performed Meteorological Station Payerne (80 km West). statistical (signal noise) systematic error sources presented.