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| Titel |
Determination and climatology of the planetary boundary layer height above the Swiss plateau by in situ and remote sensing measurements as well as by the COSMO-2 model |
| VerfasserIn |
M. Collaud Coen, C. Praz, A. Haefele, D. Ruffieux, P. Kaufmann, B. Calpini |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 23 ; Nr. 14, no. 23 (2014-12-11), S.13205-13221 |
| Datensatznummer |
250119233
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| Publikation (Nr.) |
 copernicus.org/acp-14-13205-2014.pdf |
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| Zusammenfassung |
| The planetary boundary layer (PBL) height is a key parameter in air quality
control and pollutant dispersion. The PBL height cannot, however, be directly
measured, and its estimation relies on the analysis of the vertical profiles
of the temperature, turbulence or the atmospheric composition. An
operational PBL height detection method including several remote sensing
instruments (wind profiler, Raman lidar, microwave radiometer) and several
algorithms (Parcel and bulk Richardson number methods, surface-based
temperature inversion, aerosol or humidity gradient analysis) was developed
and tested with 1 year of measurements, which allows the methods to be
validated against radio sounding measurements. The microwave radiometer
provides convective boundary layer heights in good agreement with the radio
sounding (RS) (median bias < 25 m, R2 > 0.70) and
allows the analysis of the diurnal variation of the PBL height due to its
high temporal resolution. The Raman lidar also leads to a good agreement
with RS, whereas the wind profiler yields some more dispersed results mostly
due to false attribution problems. A comparison with the numerical weather
prediction model COSMO-2 has shown a general overestimation of the model PBL
height by some hundreds to thousand meters. Finally the seasonal cycles of
the daytime and nighttime PBL heights are discussed for each instrument and
each detection algorithm for two stations on the Swiss plateau. |
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