• ACAPS goal was to investigate and further understand the relationship of the chemical, physical, radiative and cloud nucleating properties of atmospheric aerosols. The focus was to determine the chemical, physical, and biological processes controlling the formation and fate of aerosols and how these processes affect the number size distribution, the chemical composition, and the radiative and cloud nucleating properties of aerosols.

• ACI sought to improve the understanding of the relationships between the physical and chemical properties of aerosols and the microphysical and radiative properties of the clouds that form du e to aerosol cloud condensation nuclei. Additionally, ACI studied the relationships between the physical and chemical properties of the aerosols that are processed or formed by clouds.

• ACPC was established in 2007 to obtain a quantitative understanding of the interactions between aerosol, clouds, and precipitation and their role in the climate system.

The IGAC SSC first endorsed AICI in 2003 in light of research demonstrating new processes observed in the polar regions at the air-ice interface. The goal of AICI is to assess the significance of these processes at local, regional, and global scales by bringing together the laboratory, field, and modeling communities. The first phase of AICI was very successful providing important information on the full range of processes and trace gases that are exchanged at the air/ice and snow/ice interface and how they related to atmospheric chemistry and climate.