HR: 09:00h
AN: A51C-03    [Abstracts]
TI: Simulations of the July 16 and 21 CRYSTAL-FACE Cirrus Cases Using a Cloud-Resolving Model With an Improved Sedimentation Parameterization
AU: * Carver, R W
EM: rwc141@psu.edu
AF: Department of Meteorology The Pennsylvania State University, 503 Walker Building, University Park, PA 16802 United States
AU: Harrington, J Y
EM: harring@mail.meteo.psu.edu
AF: Department of Meteorology The Pennsylvania State University, 503 Walker Building, University Park, PA 16802 United States
AB: To understand what could influence the evolution and maintenance of subtropical anvil cirrus, we present results from a paired mesoscale-cloud scale numerical modeling system. The mesoscale model is used to simulate the development of convection over southern FL during the CRYSTAL-FACE study days and to provide a guide as to how the atmosphere responds to the convection. Data from the mesoscale model is used to provide initial conditions and mesoscale forcing terms for a LES simulation of detached anvil. The LES simulations use a sedimentation parameterization with improved particle fallspeed relationships and an algorithm that mimics bin microphysics. Results suggest that the amount of initial condensate present in the anvil simulation has a role in the maintenance and evolution of the cirrus layer comparable to the role played by the mesoscale forcing.
DE: 0320 Cloud physics and chemistry
DE: 3314 Convective processes
DE: 3329 Mesoscale meteorology
DE: 3337 Numerical modeling and data assimilation
SC: Atmospheric Sciences [A]
MN: 2005 Joint Assembly