Aerosol Characterization and Process Studies (ACAPS), 1996 - 2003 or earlier

Aerosol-Cloud Interaction (ACI), 1996 - 2003 or earlier

Aerosols, Clouds, Precipitation, & Climate (ACPC), 2007 - 2013

Air-Ice Chemical Interactions (AICI)

Air Pollution & Climate

African Monsoon Multidisciplinary Analysis - Atmospheric Chemistry (AMMA-AC), 2002 - 2012

Asian Pacific Regional Aerosol Characterization Experiment (ACE-ASIA), 2001

Atmospheric Chemistry & Climate (AC&C), 2007 - 2012

Atmospheric Chemistry & Climate Model Intercomparison Project (ACCMIP)

Atmospheric Chemistry and Environmental Education in Global Change (ACEED), 1995 - 2003 or earlier