Retrieval of mixing height and dust concentration with lidar ceilometer |
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| Authors: | Christoph Münkel Noora Eresmaa Janne Räsänen Ari Karppinen |
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| Institution: | (1) Vaisala GmbH, Schnackenburgallee 41d, 22525 Hamburg, Germany;(2) Finnish Meteorological Institute, Helsinki, Finland;(3) Vaisala Oyj, Vantaa, Finland |
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| Abstract: | The Vaisala ceilometers CT25K and CL31 are eye-safe single lens lidar systems reporting attenuated backscatter profiles; they
often operate 24 h a day in fully automated, hands-off operation mode. These profiles can be used for more than just cloud-base
height determination. In dry weather situations, there is a fairly good correlation between the ceilometer near-range backscatter
and in situ PM10 concentration readings. The comparison of mixing height values based on soundings and on ceilometer backscattering
profiles indicates that ceilometers are suitable instruments for determining the convective mixing height. Its enhanced optics
and electronics enables the CL31 ceilometer to detect fine boundary-layer structures whose counterparts are seen in temperature
profiles. |
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| Keywords: | Aerosol Ceilometer Lidar Mixing height |
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