Thomas Ulich

Impact of different energies of precipitating particles on NOx generation in the middle and upper atmosphere during geomagnetic storms

Esa Turunen, Pekka T. Verronen, Annika Seppälä et al. · Journal of Atmospheric and Solar-Terrestrial Physics · 2008 · 249 citations

Geophysics, Nox Generation, Upper Atmosphere +8

Diurnal variation of ozone depletion during the October–November 2003 solar proton events

Pekka T. Verronen, Annika Seppälä, Mark A. Clilverd et al. · Journal of Geophysical Research Atmospheres · 2005 · 190 citations · Full text

Upper Atmosphere, Solar Variability, Engineering +14

Long-term trends in foF2: A comparison of various methods

Jan Laštovička, A. V. Mikhailov, Thomas Ulich et al. · Journal of Atmospheric and Solar-Terrestrial Physics · 2006 · 143 citations · Full text

Reporting Standard, Long-term Trends

Emerging pattern of global change in the upper atmosphere and ionosphere

Jan Laštovička, R. A. Akmaev, Gufran Beig et al. · Annales Geophysicae · 2008 · 141 citations · Full text

Geophysics, Upper Atmosphere, Greenhouse Gas Concentrations +11

Evidence for long‐term cooling of the upper atmosphere in ionosonde data

Thomas Ulich, Esa Turunen · Geophysical Research Letters · 1997 · 138 citations

Upper Atmosphere, Lower Thermosphere, Engineering +18