The influence of outflow layer asymmetries on the structure and intensity of Superstorm Sandy

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Thursday, 6 February 2014
Hall C3 (The Georgia World Congress Center )
Eric Rappin, Western Kentucky University, Bowling Green, KY

Here we explore the influence of a large negatively tilted trough over the eastern USA on the structure and intensity evolution of Superstorm Sandy through numerical simulations with and without the presence of the trough in the initial condition. In response to evolving environmental conditions, particularly in the outflow layer, the low-level inflow modulates to produce more favorable thermodynamic conditions in regions which permit the divergent outflow access to weak resistance, or low inertial stability, in the environment. Performing dry and moist simulations will permit the isolation of the components that drive the spatial and temporal variations in convective available potential energy and convective inhibition, which reflect the influence of vortex tilt, high entropy radial inflow, and the low entropy forcing of density currents. Focus will be on the role that local and large-scale kinematic and thermodynamic properties have on controlling convective structure and organization and their feedback on intensity.