Observations within (AC)³

Data will be collected during dedicated, short–term field campaigns using ground stations, ship, balloon, and aircraft, and intensive, long–term observations from the ground (at super sites) and satellites for the circum Arctic region. The temporary, intensive field campaigns will be performed in different seasons to cover various cloud, aerosol, sea ice, and meteorological situations. They aim at detailed process studies with a focus on atmospheric and surface properties and feedback mechanisms driving Arctic Amplification. The long–term observations target on trends and spatio–temporal variability during longer time periods (up to the last 3.5 decades). The short–term intensive campaigns are embedded in the long–term data sampling. Different temporal and spatial scales will be covered by using diverse observational platforms. The collected data will have some overlap and complementarity, which assures coherence.

Observational strategy applied during (AC)³
Observational strategy applied during (AC)³
observations_schedule

Schedule of field observations, planned in Phase I of (AC)³. CONCORD: Continuous characterization of the Ny–Ålesund column and radiative effects from ground–based remote sensing; PASCAL: Physical feedback of Arctic ABL, Sea ice, Cloud and Aerosol; ABEX: Arctic Balloon–borne profiling EXperiment; ACLOUD: Arctic Clouds – Characterization of Ice, aerosol Particles and Energy fluxes; PAMARCMiP: Polar Airborne Measurements and Arctic Regional Climate Model Simulation Project; AFLUX: Arctic Amplification: Fluxes in the Cloudy Atmospheric Boundary Layer; MOSAiC: Multidisciplinary drifting Observatory for the Study of Arctic Climate. The colouring is defined as follows: yellow: ground–based; blue: ship–based; red: tethered balloon; green: aircraft; gray: space–borne.

(AC)³ Observation plattforms

Ship measurements
Ship measurements
Airborne measurements
Airborne measurements
Balloon measurements
Balloon measurements
Ground-based measurements
Ground-based measurements
Satellite measurements
Satellite measurements