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RISStorm-Scale Ensemble Kalman Filter Assimilation of Total Lightning Flash-Extent Data
Publisher: American Meteorological Society
Abstract: set of observing system simulation experiments (OSSEs) demonstrates the potential benefit from ensemble Kalman filter (EnKF) assimilation of total lightning flash mapping data. Synthetic lightning data were generated to ...
On Sedimentation and Advection in Multimoment Bulk Microphysics
Publisher: American Meteorological Society
Abstract: In two-moment bulk microphysics schemes, the practice of using different weighted fall velocities for the various moments is known to lead to artificial growth in reflectivity values for fast-falling particles, particularly ...
Electrification and lightning in idealized simulations of a hurricane-like vortex subject to wind shear and sea surface temperature cooling.
Publisher: American Meteorological Society
Abstract: elationships between intensity fluctuations, cloud microphysics, lightning variations and electrical structure within idealized tropical cyclones are investigated with the cloud-resolving Collaborative Model for Multiscale ...
Aerosol Effects on Simulated Storm Electrification and Precipitation in a Two-Moment Bulk Microphysics Model
Publisher: American Meteorological Society
Abstract: he effects of cloud condensation nuclei (CCN) concentrations are found to strongly affect the microphysical and electrical evolution of a numerically simulated small multicell storm. The simulations reproduce the well-known ...
A Bulk Microphysics Parameterization with Multiple Ice Precipitation Categories
Publisher: American Meteorological Society
Abstract: A single-moment bulk microphysics scheme with multiple ice precipitation categories is described. It has 2 liquid hydrometeor categories (cloud droplets and rain) and 10 ice categories that are characterized by habit, size, ...
Relationships between Electrification and Storm-Scale Properties Based on Idealized Simulations of an Intensifying Hurricane-Like Vortex
Publisher: American Meteorological Society
Abstract: AbstractThis study investigates relationships between storm-scale properties and the electrification and lightning of two simulations of an intensifying idealized tropical cyclone (TC) using the cloud-resolving Collaborative ...
Simulated Electrification of a Small Thunderstorm with Two-Moment Bulk Microphysics
Publisher: American Meteorological Society
Abstract: Electrification and lightning are simulated for a small continental multicell storm. The results are consistent with observations and thus provide additional understanding of the charging processes and evolution of this ...
Does Wind Shear Cause Hydrometeor Size Sorting?
Publisher: American Meteorological Society
Abstract: everal recent studies have implicated vertical wind shear in producing steady-state size sorting of a distribution of hydrometeors falling at their terminal velocity, which varies as a function of hydrometeor diameter. In ...
A Lightning Data Assimilation Technique for Mesoscale Forecast Models
Publisher: American Meteorological Society
Abstract: Lightning observations have been assimilated into a mesoscale model for improvement of forecast initial conditions. Data are used from the National Lightning Detection Network (cloud-to-ground lightning detection) and a ...
Bin-Emulating Hail Melting in Three-Moment Bulk Microphysics
Publisher: American Meteorological Society
Abstract: A three-moment bulk microphysics scheme is modified to treat melting in a size-dependent manner that emulates results from a spectral bin scheme. The three-moment bulk framework allows the distribution shape to change and ...