Simulation of Inverted Charge Structure Formation in Convective Regions of Mesoscale Convective System

Charge transfer and in-cloud structure of large-charge-moment positive lightning strokes in a mesoscale convective system

[1] Lightning observations in the very high frequency band and measurements of ultra low frequency magnetic fields are analyzed to investigate the charge transfer and in-cloud structure of eight positive cloud-to-ground (+CG) strokes in a mesoscale convective system. Although no high altitude images were recorded, these strokes contained large charge moment changes (1500–3200 C km) capable of p...

Parameterization of Convective Clouds, Mesoscale Convective Systems, and Convective-Generated Clouds

This presentation is a summary of research progress supported under the Atmospheric Radiation Measurement (ARM) project entitled "Parameterization of Convective Clouds, Mesoscale Convective Systems, and Con'o'ective-Generated Clouds." The approach used in this research is to perform explicit simulations of convective clouds and mesoscale convective systems for well-documented observed cases. Th...

Convective Structures in a Simulated Torrential-Rain-Producing Mesoscale Convective System in East China

Objective Classification of Tropical Mesoscale Convective Systems

A cluster analysis is applied to the mesoscale convective systems (MCSs) that developed in northern Australia and the surrounding oceans during six wet seasons (September–April) from 1995/96 to 2000/01. During this period, 13 585 MCSs were identified and tracked using an infrared channel (IR1) on the Japanese Meteorological Agency Geostationary Meteorological Satellite 5 (GMS5). Based on the li...

Tornadogenesis in a Simulated Mesovortex within a Mesoscale Convective System

TheAdvanced Regional Prediction System (ARPS) is used to simulate a tornadic mesovortex with the aim of understanding the associated tornadogenesis processes. The mesovortex was one of two tornadic mesovortices spawned by a mesoscale convective system (MCS) that traversed southwestern and central Oklahoma on 8–9 May 2007. The simulation used 100-m horizontal grid spacing, and is nested within t...