Environmental & Climate Sciences Department Seminar

"What drives precipitation initiation in marine stratocumulus?"

Presented by David Mechem, University of Kansas

Thursday, October 17, 2019, 11:00 am — Large Conference Room, Bldg. 490

The initial formation of precipitation in warm clouds remains shrouded in mystery. Precipitation initiation in bulk microphysical parameterizations is typically cast as a nonlinear function dependent on liquid water content and droplet concentration, which suggests two possible paths to precipitation initiation in actual clouds—high liquid water content or low droplet concentration. A bin-microphysics large-eddy simulation (LES) model is employed investigate the dominant microphysical precursor conditions influencing precipitation initiation for a case of marine stratocumulus over the eastern North Atlantic. Results suggest that new regions of precipitation are associated with fluid parcels that previously participated in the precipitation process.

Hosted by: Mike Jensen

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