HR: 14:40h
AN: A13G-05 INVITED    [Abstracts]
TI: The Impact of Black Carbon on Cloud Radiative Forcing
AU: * Pilewskie, P
EM: Peter.Pilewskie@lasp.colorado.edu
AF: University of Colorado, Laboratory for Atmospheric and Space Physics, 1234 Innovation Drive, Boulder, CO 80303-7814, United States
AU: Kindel, B
EM: Bruce.Kindel@lasp.colorado.edu
AF: University of Colorado, Laboratory for Atmospheric and Space Physics, 1234 Innovation Drive, Boulder, CO 80303-7814, United States
AU: Schmidt, K S
EM: sebastian.schmidt@lasp.colorado.edu
AF: University of Colorado, Laboratory for Atmospheric and Space Physics, 1234 Innovation Drive, Boulder, CO 80303-7814, United States
AB: We present an overview of the current level of understanding on how black carbon may modify the shortwave radiative properties of clouds, from the perturbation of the scattering and absorption properties of individual cloud droplets and ice crystals to its influence on energy balance via the transmitted and reflected spectral irradiance fields. Until recently, most of our knowledge resulted from modeling studies. However, the April-May 2007 PACific Dust EXperiment (PACDEX) provided a first of its kind opportunity to investigate the evolution of urban industrial aerosols plumes as they transport from their Eurasian source regions to North America, with subsequent radiative, dynamical, and microphysical impacts on trans-Pacific storm systems. We will highlight measurements of spectral cloud reflectance and transmittance in the presence of pollution and interpret in the context of some of the recent modeling studies on black carbon – cloud interactions.
DE: 1610 Atmosphere (0315, 0325)
DE: 3311 Clouds and aerosols
DE: 3359 Radiative processes
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting