HR: 16:15h
AN: A12F-02    [PDF]
TI: Effects of Arctic Haze on Low-level Cloud Microphysics
AU: * Zhao, C
EM: czhao@met.utah.edu
AF: University of Utah, Meteorology Department, Salt Lake City, UT 84112-0110 United States
AU: Garrett, T J
EM: tgarrett@met.utah.edu
AF: University of Utah, Meteorology Department, Salt Lake City, UT 84112-0110 United States
AU: Dong, X
EM: dong@aero.und.edu
AF: University of North Dakota, Department of Atmospheric Sciences Box 9006, Grand Forks, ND 58202-9006 United States
AU: Mace, G G
EM: mace@met.utah.edu
AF: University of Utah, Meteorology Department, Salt Lake City, UT 84112-0110 United States
AB: Aerosol measurements from the NOAA Climate Monitoring and Diagnostics Laboratory (CMDL), and cloud retrieval data from the Atmospheric Radiation Program (ARM), located near Barrow, Alaska, are used to study the interactions between Arctic Haze and low-level arctic cloud microphysics. The measurements of aerosol scattering ($\sigma_{sp}$), droplet concentration (N), and droplet effective radius ($r_{e}$) show that haze events are associated with higher concentrations of droplets and smaller droplet effective radii. Nucleation events, with high Aitken nucleus concentrations but low ($\sigma_{sp}$), show no relationship with N or $r_{e}$. Therefore, long-range transported aerosols, rather than those produced by in-situ production, dominate the impact on cloud microphysical and radiative properties in Arctic winter through spring.
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0320 Cloud physics and chemistry
DE: 0360 Transmission and scattering of radiation
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting