11th International Workshop on Long-Term
Changes and Trends in the Atmosphere

Welcome to the 11th International Workshop on Long-Term Changes and Trends in the Atmosphere which will be held at the Space and Earth Observation Centre, Finnish Meteorological Institute (FMI), Helsinki, Finland.

In addition to the main workshop, two SPARC side meetings will be arranged:

• 6th LOTUS Workshop (Long-term Ozone Trends
  and Uncertainties in the Stratosphere)
  
• ATC Workshop (Atmospheric Temperature Changes)

Important dates:

• Travel support application deadline: extended until 21 March 2022
• Abstract submission deadline: extended until 21 March, 2022
• Travel support decisions: 1 April, 2022
• Early registration deadline: 2 May, 2022
• Workshop dates: 30 May - 3 June, 2022

The workshop topics include:

• Observed trends and long-term variations in the middle atmosphere
• Modeled and predicted trends and long-term variations in the middle atmosphere
• Trends and long-term changes in the ionosphere and thermosphere
• Dynamic, physical, chemical and radiative mechanisms of trends and long-term variations
• Role of the middle atmosphere for climate
• Miscellaneous

Scientific organising committee (SOC):

• Jan Laštovička (chair), Institute of Atmospheric Physics, Prague, Czech Republic
• Gufran Beig, Indian Institute of Tropical Meteorology, Pune, India
• Franz-Josef Lübken, Leibniz Institute of Atmospheric Physics, Kühlungsborn, Germany
• Liying Qian, High Altitude Observatory, NCAR, Boulder, CO, USA
• Kalevi Mursula, University of Oulu, Oulu, Finland
• Gabriele Stiller, Karlsruhe Institute of Technology, Germany
• Ana G. Elías, Universidad Nacional de Tucumán, Argentina
• Irina Petropavlovskikh, NOAA Earth System Research Laboratory, CIRES, University of Colorado, Boulder, CO, USA
• Viktoria Sofieva, Finnish Meteorological Institute, Helsinki, Finland

Local organising committee (LOC): Viktoria Sofieva (chair), Niilo Kalakoski, Monika Szeląg, Pekka Verronen, and Pinja Vesanen. LOC address: Space and Earth Observation Centre, Finnish Meteorological Institute, P.O. Box 503, FI-00101 Helsinki, Finland. LOC E-mail: