The mesosphere/lower thermosphere (MLT) is one of the scientifically most challenging regions of the atmosphere. The MLT is the region where wave-wave and wave-mean flow interaction processes lead to a mean circulation regime that is extremely far from radiative equilibrium. Although radar measurements of MLT winds are possible since more than half a century, our current knowledge on MLT dynamics is still far from complete, mostly due to incomplete coverage of the global wind field by grond-based remote sensing system.
As a contribution to our knowledge of MLT dynamics a SKiYMET meteor radar is operated at Collm Observatory (51.3°N, 13°E) continuously since August 2004. The measurements base on specular reflections of VHF radio signals on ionised meteor trails. They deliver meteor parameters, hourly wind information in the height range 80-100 km and daily mean temperatures near the mesopause. Together with the LF wind measurements performed at Collm 1959-2008 a unique MLT circulation parameter dataset is available at Collm.
please click on the figures for a better resolution
All data must be considered as preliminary. They are provided for information only and must be validated by the issuing authority before use!
Selected publications are available at http://home.uni-leipzig.de/jacobi/collm/fo_radar.htm
More information on our MLT research is available on
|letzte Stunde||0.0 mm|
|letzte 24 h||0.0 mm|
(1 min max)
5 cm üb. Boden
|10 cm||11.3 °C|
|20 cm||12.7 °C|
|50 cm||13.8 °C|
|100 cm||14.8 °C|
Daten: LIM, letzte Änderungen 10.06.2021 durch Falk Kaiser