Description:

The northern high-latitudes are warming 2-4 times more quickly than the annual mean, with

clouds both implicated and responding to the warming. The rapid change motivates desire to

better understand how the cloudy Arctic atmosphere is interacting with its environment.

Relevant processes span the ‘grey-zone’ of resolved and parameterized convection occurring within a larger envelope of global circulation changes. These processes include ice-nucleation, secondary ice processes, air-sea interactions, cloud-radiation interactions, precipitation processes, cloud organization, mesoscale dynamics, moisture transport, and local interactions with synoptic and larger-scale circulations.

In this session we seek presentations on findings from recent high-latitude field campaigns spanning both hemispheres (including but not limited to CAESAR, COMBLE, AC3, ACAO, ISLAS, ARCSIX, SOCRATES, MARCUS), physical processes governing the lifecycle of high-latitude mixed-phase clouds, integration of observational analyses with modeling at a range of scales, and identification of local responses to larger-scale changes and their potential feedbacks.

Connections drawn across observational campaigns (ship and aircraft), remote sensing/satellite analyses both existing and planned, and model-observational comparisons are valued.