Coupling of transport and chemistry

The spatial distribution and temporal variability of the radiation-active trace gases (such like ozone, water vapor and carbon dioxide) determines the global radiation and energy balances. It depends on temperature-dependent photochemical reactions and transports. The study of the vertical coupling of these complex interaction processes is challenging. The link between transport, radiation and chemistry of the middle atmosphere are subjects studied under this topic.


The studies rely on a hierarchy of models with different complexity: high-resolution circulation models (for example KMCM), medium-resolution general circulation models with coupled chemistry, dedicated chemistry-transport models (fpr example MECTM) and linear transport process models. For comparison, internationally available observations and assimilations of trace gas distributions are used. This wide spectrum of different observational data and model versions is necessary to understand the complex interaction of transport, radiation and chemistry. It gives solid ground to studies of long-term changes in the middle atmosphere (see also Dynamics and variability). Further, new methods for the mathematical-numerical description of trace gas transports and chemistry of the mesosphere are developed.

Recent publications

  • Belikovich, M. V., M. Y. Kulikov, M. Grygalashvyly, G. R. Sonnemann, T. S. Ermakova, A. A. Nechaev & A. M. Feigin, 2018: Ozone chemical equilibrium in the extended mesopause under the nighttime conditions. Adv. Space Res. 61,  1: 426-432, doi:10.1016/j.asr.2017.10.010.
  • Fiedler, J., G. Baumgarten, U. Berger, A. Gabriel, R. Latteck & F.-J. Lübken, 2015: On the early onset of the NLC season 2013 as observed at ALOMAR. J. Atmos. Sol.-Terr. Phys. 127: 73 - 77. doi:10.1016/j.jastp.2014.07.011.
  • Gabriel, A., I. Höschel, D. H. W. Peters, I. Kirchner & H.-F. Graf, 2013: The influence of zonally asymmetric stratospheric ozone on the coupling of the atmospheric layers. Climate and Weather of the Sun-Earth System (CAWSES): Highlights form a priority program, F.-J. Lübken, Ed., Springer Berlin & New York: 443 - 466.
  • Grygalashvyly, M., 2015: Several notes on the OH* layer. Ann. Geopys. 33, 7: 923-930. doi:10.5194/angeo-33-923-2015.
  • Kulikov, M. Y., M. V. Belikovich, M. Grygalashvyly, G. R. Sonnemann, T. S. Ermakova, A. A. Nechaev & A. M. Feigin, 2017: Daytime ozone loss term in the mesopause region. Ann. Geopys. 35,  3: 677-682, doi:10.5194/angeo-35-677-2017.
  • Wilms, H., M. Rapp & A. Kirsch, 2016: Nucleation of mesospheric cloud particles: Sensitivities and limits. J. Geophys. Res. Space Physics 121, 3: 2621-2644. doi:10.1002/2015ja021764.


  • Axel Gabriel
  • Erich Becker
  • Mikhailo Grygalashvyly
  • Annekatrin Kirsch
  • Dieter H.W. Peters
  • Andrea Schneidereit
  • Christoph Zülicke