A Comparison Between Modelled and Measured Mixing-Layer Height Over Munich |
| |
Authors: | Aggeliki Dandou Maria Tombrou Klaus Schäfer Stefan Emeis Anna P Protonotariou Elissavet Bossioli Nikolaos Soulakellis Peter Suppan |
| |
Institution: | 1.National and Kapodestrian University of Athens,Athens,Greece;2.Institut für Meteorologie und Klimaforschung, Atmosph?rische Umweltforschung (IMK-IFU),Garmisch-Partenkirchen,Germany;3.University of the Aegean,Mytilene, Lesbos,Greece |
| |
Abstract: | An attempt is made to correlate the mixing heights, derived from ceilometer and Sodar measurements, to those simulated by
different atmospheric boundary-layer parameterization schemes. The comparison is performed at two sites (one suburban and
one rural) close to Munich, Germany for two spring and two winter days. It is found that, under convective conditions, the
mixing height determined, by both Sodar and ceilometer, corresponds to the middle or the top of the entrainment zone, respectively,
as calculated from the eddy-viscosity profiles. Under stable conditions, the measured mixing height is related to the height
where eddy viscosities attain their minimum values (Sodar) or to the height of residual mechanical turbulence (ceilometer).
During a foehn case with weak turbulence, the measured mixing height from both Sodar and ceilometer is better inferred by
considering the eddy-viscosity profiles during daytime and the height of the low-level jet during nighttime. |
| |
Keywords: | Ceilometer Eddy viscosity Mixing height MM5 numerical model Sodar |
本文献已被 SpringerLink 等数据库收录! |
|