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Proceedings Paper

Mixing layer height and air pollution levels in urban area
Author(s): Klaus Schäfer; Patrick Wagner; Stefan Emeis; Carsten Jahn; Christoph Muenkel; Peter Suppan
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Paper Abstract

Ceilometers are applied by KIT/IMK-IFU to detect layering of the lower atmosphere continuously. This is necessary because not only wind speed and direction but also atmospheric layering and especially the mixing layer height (MLH) influence exchange processes of ground level emissions. It will be discussed how the ceilometer monitoring information is used to interpret the air pollution near the ground.

The information about atmospheric layering is continuously monitored by uninterrupted remote sensing measurements with the Vaisala ceilometer CL51 which is an eye-safe commercial mini-lidar system. Special software for this ceilometer provides routine retrievals of lower atmosphere layering from vertical profiles of laser backscatter data.

An intensive measurement period during the winter 2011/2012 is studied. The meteorological influences upon air pollutant concentrations are investgated and the correlations of air pollutant concentrations with ceilometer MLH are determined. Benzene was detected by department of Applied Climatology and Landscape Ecology, University of Duisburg-Essen (UDE) with a gas chromatograph during the measurement period. The meteorological data are collected by UDE and the monitoring station Essen of the German national meteorological service DWD. The concentrations of the air pollutants NO, NO2 and PM10 are provided by the national air pollution network LANUV.

Paper Details

Date Published: 25 October 2012
PDF: 10 pages
Proc. SPIE 8534, Remote Sensing of Clouds and the Atmosphere XVII; and Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing VIII, 853409 (25 October 2012); doi: 10.1117/12.974328
Show Author Affiliations
Klaus Schäfer, Karlsruher Institut für Technologie (Germany)
Patrick Wagner, Univ. Duisburg-Essen (Germany)
Stefan Emeis, Karlsruher Institut für Technologie (Germany)
Carsten Jahn, Karlsruher Institut für Technologie (Germany)
Christoph Muenkel, Vaisala GmbH (Germany)
Peter Suppan, Karlsruher Institut für Technologie (Germany)


Published in SPIE Proceedings Vol. 8534:
Remote Sensing of Clouds and the Atmosphere XVII; and Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing VIII
Upendra N. Singh; Gelsomina Pappalardo; Evgueni I. Kassianov; Adolfo Comeron; Richard H. Picard; Klaus Schäfer, Editor(s)

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