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Atmospheric boundary-layer structure from simultaneous SODAR, RASS, and ceilometer measurements
AbstractA comparison of the determination of boundary-layer structures by a SODAR, by a RASS, and by a ceilometer is presented. One important structure is the mixing-layer height (MLH). The comparison is focused on 3 days with an evolution of a convective boundary layer over a larger city in Germany. The three instruments give information that partly agree and partly complement each other. By this, a picture of the diurnal evolution of the vertical structure of this urban boundary layer is presented. The ceilometer gives information on the aerosol content of the air and the RASS provides a direct measurement of the vertical temperature distribution in the boundary layer. The RASS and the ceilometer add information on the moisture structure of the boundary layer that is not detected by the SODAR. On the other hand this comparison validates known techniques by which the MLH is derived from SODAR data. Especially the temperature information from the RASS agrees well with lifted inversions derived from the analysis of the SODAR data. The ceilometer, being the smallest instrument, has a potential to be used in future MLH studies.
Atmospheric boundary-layer structure from simultaneous SODAR, RASS, and ceilometer measurements
AbstractA comparison of the determination of boundary-layer structures by a SODAR, by a RASS, and by a ceilometer is presented. One important structure is the mixing-layer height (MLH). The comparison is focused on 3 days with an evolution of a convective boundary layer over a larger city in Germany. The three instruments give information that partly agree and partly complement each other. By this, a picture of the diurnal evolution of the vertical structure of this urban boundary layer is presented. The ceilometer gives information on the aerosol content of the air and the RASS provides a direct measurement of the vertical temperature distribution in the boundary layer. The RASS and the ceilometer add information on the moisture structure of the boundary layer that is not detected by the SODAR. On the other hand this comparison validates known techniques by which the MLH is derived from SODAR data. Especially the temperature information from the RASS agrees well with lifted inversions derived from the analysis of the SODAR data. The ceilometer, being the smallest instrument, has a potential to be used in future MLH studies.
Atmospheric boundary-layer structure from simultaneous SODAR, RASS, and ceilometer measurements
Emeis, Stefan (author) / Münkel, Christoph (author) / Vogt, Siegfried (author) / Müller, Wolfgang J (author) / Schäfer, Klaus (author)
Atmospheric Environment ; 38 ; 273-286
2003-09-15
14 pages
Article (Journal)
Electronic Resource
English
SODAR , RASS , Ceilometer , Remote sensing , Urban boundary layer , Mixing-layer height , ABL, Atmospheric boundary-layer , CBL, Convective boundary-layer , MLH, Mixing-layer height , PM<inf>2.5</inf>, Particulate matter smaller than 2.5<hsp></hsp>μm in diameter , PM<inf>10</inf>, Particulate matter smaller than 10<hsp></hsp>μm in diameter (includes PM<inf>2.5</inf>) , SBL, Stable boundary-layer , FM-CW, Frequency-modulated continuous-wave , FTIR, Fourier-transform infrared spectroscopy , LIDAR, Light detection and ranging , MWR, Microwave radiometer , RADAR, Radio detection and ranging , RASS, Radio acoustic sounding system , SODAR, Sound detection and ranging , WTR, Wind-temperature-radar , AFO2000, Atmospheric research programme of BMBF , BMBF, German Federal Ministry of Education and Research, Bonn, Germany , IMK-ASF, Institute for Meteorology and Climate Research—Atmospheric trace substances and remote sensing, Karlsruhe, Germany , IMK-IFU, Institute for Meteorology and Climate Research—Atmospheric Environmental Research, Garmisch-Partenkirchen, Germany , METEK, Meteorologische Messtechnik GmbH, Elmshorn, Germany , NLÖ, Lower Saxony Agency for Ecology, Hannover, Germany.
Description of atmospheric variables measured with a RASS sodar: Cycles and distribution functions
| Online Contents | 2008
Description of atmospheric variables measured with a RASS sodar: Cycles and distribution functions
| Online Contents | 2008