Dr Khalil Karami completed his PhD at the Karlsruhe Institute of Technology in Germany where his main focus was on the middle atmospheric physics and dynamics and the top-down coupling of the middle atmosphere to the troposphere. He is currently an Atmospheric Science Researcher at the Institute for Advanced Studies in Basic Sciences, Zanjan, Iran, where he is conducting fundamental research on the variability of the upper tropospheric storm-tracks. He is particularly interested in the role of atmospheric waves – from their generation to their propagation and their breaking – in the large-scale dynamics and circulation of the atmosphere.