GOALS FOR 2004-2006

To document the full range of processes and emitted trace gases that arise at the air-ice interface, and how they depend on environmental conditions.

To quantify the fluxes of trace gases and aerosol between atmosphere and ice under a range of field experimental conditions.

To determine the main factors that control the fluxes of trace gases between air and ice, using both fielddata and carefully designed laboratory experiments.

To build simple models that include processes in the upper firn and lower atmosphere, to assess the effects of air-ice fluxes.

To make a first assessment of the scale of these processes, and assess the significance for climate or atmospheric chemistry within the global troposphere, the atmospheric boundary layer, or regionally, and in urban environments.

To develop simple parameterisations of the fluxes and processes studied for incorporation into sophisti-cated global chemical models.