Welcome to ICMA web page
The International Commission on the Middle Atmosphere (ICMA) is one of the 10 Commissions making up the International Association of Meteorology and Atmospheric Science (IAMAS), which in turn is one of the 8 Associations constituting the International Union of Geodesy and Geophysics (IUGG).
The IUGG meets in a worldwide Assembly every four years (...1991, 1995, 1999, 2003, 2007, 2011,..). The individual IUGG associations also meet every four years (...1993, 1997, 2001, 2005, 2009, 2013, 2015, ..). ICMA has generally met alternately with the Scientific Assemblies of IAMAS and the International Association of Aeronomy and Geomagnetism (IAGA).
ICMA exists to foster international cooperation in research into the science of the middle atmosphere, defined loosely as stretching from the tropopause into the lower thermosphere. In addition to holding its biennial meetings in conjunction with IUGG, IAMAS or IAGA, ICMA sponsors or cosponsors other meetings and workshops. ICMA also has a number of working groups to facilitate cooperation in particular areas.