IGAC's biennial Open Science Conferences are the primary mechanism for dissemination of scientific information across our community. The conference is held jointly with iCACGP quadrennially. A special effort is made to engage early career scientists and scientists from emerging countries. Since 2004 the IGAC Early Career Program has been an integral part of the conference. iCACGP and IGAC are currently accepting bids to host the 2022 International Atmospheric Chemistry Conference. Full bid requirements can be found here and are due by 24 April 2020.