APARC

• ICMA is collaborating with APARC’s QBOi and SNAP activities and QUOCA working group. ICMA co-sponsored the Joint QBOi-SNAPSI-QUOCA activity workshop on “Improved simulations of the stratosphere for better predictions of weather, climate and extreme events”  held in Cambridge, UK, 24-28 March 2025.
• ICMA is collaborating with APARC’s DynVar  – Dynamical variability activity.  ICMA co-sponsored the Atmospheric circulation in a changing climate – DynVarMIP workshop, 22-25 October 2019 in Madrid.
• ICMA is collaborating with APARC’s SOLARIS-HEPPA  – Solar influences on Climate activity.  ICMA co-sponsored the 4^th International HEPPA-SOLARIS workshop 2014 in Baden-Baden/Germany.
• ICMA co-organized the IUGG/WCRP-APARC training school on stratosphere-troposphere interactions 2017 in Cape Town, South Africa.

IAGA and SCOSTEP

• ICMA is part of the Inter-Association (IAGA/ICMA/SCOSTEP) Working Group II-F: Long-term Trends in the Mesosphere, Thermosphere and Ionosphere.
• ICMA regularly co-sponsors Workshops on Vertical Coupling in the Atmosphere-Ionosphere System, jointly with SCOSTEP and IAGA.
• ICMA regularly co-sponsors the “Solar influences on the Atmosphere” Symposium at IUGG and joint IAMAS-IAGA assemblies. 
• ICMA regularly co-sponsors International Workshops on Long-Term Changes and Trends in the Atmosphere, jointly with SCOSTEP and IAGA.