Aerosols, Clouds, Precipitation and Climate (ACPC)

The interactions between aerosols, clouds and precipitation in the climate system are the largest uncertainties in the estimation of anthropogenic climate forcing and climate sensitivity. Recent developments in process understanding, modeling, and observational capabilities make it now possible to address long-standing and fundamental questions in this field.

“Aerosols, Clouds, Precipitation and Climate (ACPC)” initiative has been established to facilitate and enable international and interdisciplinary research in this field. The goal of the ACPC research program is to obtain a quantitative understanding of the interactions between the aerosol, clouds and precipitation, and their role in the climate system. The main question ACPC tries to answer is: How do aerosol-precipitation interactions manifest themselves at the full range of temporal and spatial scales in the climate system?

ACPC was jointly initiated by the IGBP  (International Geosphere-Biosphere Programme) core projects iLEAPS (Integrated Land Ecosystem Atmosphere - Processes Study) and IGAC (International Global Atmospheric Chemistry project), and the WCRP (World Climate Research Programme) core project GEWEX (Global Energy and Water Cycle Experiment).

ACPC Science Plan is available for download (pdf).

The ACPC mailing list (acpc AT is aimed at those interested in and working on issues related to aerosol-cloud-precipitation-climate interactions. If you like to subscribe to the list please send your name, e-mail address, affiliation and short description about your work, research area and/or relationships to the ACPC field to iLEAPS IPO (ipo AT

Past events:

  • ACPC & Sat-ACPC meeting, 13 April 2013, Wien, Austria