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Ceilometers have originally been designed to detect the height of clouds (ceiling). They are today used to observe the vertical distribution of aerosols in the lower atmosphere. They emit a light beam at about 0.9 µm and record the optical backscatter.
Ceilometer CL51
Ceilometer (Foto: Christoph Münkel)

Height  resolution:        15 m

height range:            4000 m

frequency:               ~ 0.9 µm

time resolution:            15 s

height of instrument:    1.2 m


Application of ceilometer data


Determination of the diurnal evolution of the boundary layer

Determination of the vertical aerosol distribution

Determination of the mixing-layer height (Emeis et al. 2007)


Contact: Stefan Emeis