Lidar mixing height determination during Helsinki testbed

Christoph Münkel

doi:10.1117/12.689753

11 October 2006 Lidar mixing height determination during Helsinki testbed

Christoph Münkel

Proceedings Volume 6362, Remote Sensing of Clouds and the Atmosphere XI; 63620Q (2006) https://doi.org/10.1117/12.689753
Event: SPIE Remote Sensing, 2006, Stockholm, Sweden

Abstract

Helsinki Testbed is a research project of mesoscale meteorology running from January 2005 till September 2007. Five commercial lidar ceilometers situated in and around Helsinki, Finland are involved in this measuring campaign. The enhanced single lens optical concept of these Vaisala CL31 ceilometers improves the ability to investigate surface inversions in the lowest 100 m of the atmosphere. Attenuated backscatter profiles report interval for the Helsinki Testbed campaign has been set to 16 s, range resolution is 10 m. At one of the five sites an additional ceilometer of the same type is installed, its attenuated backscatter profiles are in good correlation with the Helsinki Testbed unit. Wind and temperature profiles from a wind profiler with RASS option and from regular radiosoundings at two different sites are available for comparisons. Two different methods of mixing height assessment have been applied, a gradient method and the idealized backscatter method introduced by the Finnish Meteorological Institute (FMI) that fits ideal attenuated backscatter profiles with variable entrainment zones to measured profiles.

Citation Download Citation

Christoph Münkel "Lidar mixing height determination during Helsinki testbed", Proc. SPIE 6362, Remote Sensing of Clouds and the Atmosphere XI, 63620Q (11 October 2006); https://doi.org/10.1117/12.689753

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