HR: 1340h
AN: A23D-1566 [Abstracts]
TI: Simulation of Asia Dust and Cloud Interaction Over Pacific Ocean During Pacdex
AU: * Long, X
EM: longxiao@lzu.edu.cn
AF: Lanzhou University, 222 South Tianshui Road, Lanzhou, GS 730000, China
AU: Huang, J
EM: hjp@lzu.edu.cn
AF: Lanzhou University, 222 South Tianshui Road, Lanzhou, GS 730000, China
AU: Cheng, C
EM: ctcheng@climate.cestm.albany.edu
AF: University at Albany,State University of New York, 251 Fuller Road, Albany, NY 12203,
United States
AU: Wang, W
EM: wang@climate.cestm.albany.edu
AF: University at Albany,State University of New York, 251 Fuller Road, Albany, NY 12203,
United States
AB:
The effect of dust plume on the Pacific cloud systems and the associated radiative forcing is an outstanding
problem for understanding climate change. Many studies showing that dust aerosol might be a good absorber for
solar radiation, at the same time dust aerosols could affect the cloud's formation and precipitation by its
capability as cloud condensation nuclei (CCN) and ice forming nuclei (IFN). But the role of aerosols in clouds and
precipitation is very complex. Simulation of interaction between cloud and dust aerosols requires recognition that
the aerosol cloud system comprises coupled components of dynamics, aerosol and cloud microphysics,
radiation processes. In this study, we investigated the interaction between dust aerosols and cloud with WRF
which coupled with detailed cloud microphysics processes and dust process. The observed data of SACOL
(Semi-Arid Climate and Environment Observatory of Lanzhou University) and PACDEX (Pacific Dust Experiment)
is used as the initialization which include the vertical distributions and concentration of dust particles. Our results
show that dust aerosol not only impacts cloud microphysical processes but also cloud microstructure; Dust
aerosols can act as effective ice nuclei and intensify the ice-forming processes.
UR: http://climate.lzu.edu.cn/~jhuang/
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0320 Cloud physics and chemistry
DE: 0321 Cloud/radiation interaction
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting