HR: 1340h
AN: A23C-0971    [Abstracts]
TI: Summertime Arctic Mixed-Phase Clouds
AU: * Zuidema, P
EM: pzuidema@rsmas.miami.edu
AB: 3 mixed-phase clouds observed during July of the Surface Heat Budget of the Arctic experiment are discussed. The analysis relies on a combination of surface-based remote sensing measurements and aircraft data. The clouds were multi-layered ice clouds with liquid layers either embedded within the ice phase (July 8) or overlying the ice phase (July 15 and 23). The liquid layers have temperatures ranging between -20 to -5 Celsius. Thin boundary layer clouds or fog underlie the mixed-phase clouds. The boundary layer clouds are liquid but possess temperatures close to the surface temperature of near zero Celsius. The 3 cases all coincide with meltpond-ice surfaces with albedos of approximately 0.5. The cloud microphysical characteristics, radiative impact, and lifecycles will be discussed.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0320 Cloud physics and chemistry
DE: 0321 Cloud/radiation interaction
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005