[摘要] A novel method for estimating the mixing height based on ceilometermeasurements is described and tested against commonly used methods fordetermining mixing height. In this method an idealised backscatter profileis fitted to the observed backscatter profile. The mixing height is one ofthe idealised backscatter profile parameters.
An extensive amount of ceilometer data and vertical soundings data from theHelsinki area in 2002 is utilized to test the applicability of theceilometer for mixing height determination. The results, including 71convective and 38 stable cases, show that in clear sky conditions the mixingheights determined from ceilometer based aerosol profiles and BL-heightestimates based on sounding data are in a good agreement. Rejected outliercases corresponded to very low aerosol concentrations in the mixed layerleading to a very weak aerosol backscatter signal in the lowest layer.
