Friday, January 18, 2008, 11:00 am — Building 815, Conference Room
The interaction of turbulence and aerosol particles in and surrounding clouds is important in understanding the microphysical properties of clouds. The seminar will detail the measurement of atmospheric turbulence with the gustprobe on the DOE G-1 Research Aircraft. This includes the techniques and associated difficulties of calculating atmospheric turbulent energy dissipation rates, updraft/downdraft velocities, and turbulent microphysical Reynolds numbers from the gustprobe data. Examples will be shown from the MASE 2005 study over the Pacific and the CHAPS 2007 study in Oklahoma. The MASE example will include the ubiquitous aerosol layer which is observed directly above marine stratus clouds. This 25 meter thick layer will be shown to be turbulently coupled to the marine stratus cloudtop, with turbulent exchange of aerosol particles between the layer and the cloudtop. Microphysical and chemical data will be shown which indicates that this layer is a region of aerosol production, as evidenced by enhanced aerosol particle, ozone and sulfur dioxide concentrations.
4156 | INT/EXT | Events Calendar
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