Frequency distributions of the mixing height over an urban area from SODAR data

Authors: Emeis, Stefan; Türk, Matthias

Source: Meteorologische Zeitschrift, Volume 13, Number 5, October 2004 , pp. 361-367(7)

Publisher: E. Schweizerbart'sche Verlagsbuchhandlung

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Abstract:

The height of the mixing-layer (MLH) is an important parameter in the assessment of the dilution of primarily emitted or secondarily formed air pollutants in the atmospheric boundary-layer. A continuous measurement of MLH is possible only by remote sensing. Here, 17 months of SODAR data have been analysed automatically to derive the MLH over the city of Hannover in Northern Germany. In contrast to earlier studies the MLH has been determined from vertical profiles of the acoustic backscatter intensity and from the variance of the vertical velocity component. The results are presented in form of monthly frequency distributions and mean daily courses of MLH. These statistical evaluations of MLH show a clear annual course and interannual variability. The study shows the possibility to derive meaningful climatological information from long-term SODAR measurements for air quality issues.

Document Type: Research article

DOI: http://dx.doi.org/10.1127/0941-2948/2004/0013-0361

Publication date: 2004-10-01

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Meteorologische Zeitschrift (originally founded in 1866) is the joint periodical of the meteorological societies of Austria, Germany and Switzerland. It accepts high-quality peer-reviewed manuscripts on all aspects of observational, theoretical and computational research out of the entire field of meteorology, including climatology. Meteorologische Zeitschrift represents a natural forum for the meteorological community of Central Europe and worldwide.
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