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Role for Lightning in Tornadogenesis and Possible Modification
The Journal of Weather Modification, 2006New consideration is given to the action, under severe storm conditions, of repeated, spatially-localized, intracloud lightning flashes providing enhancement of updraft wind velocities towards initiation of a tornado. The basis for the updraft wind enhancement comes from lightning-generated H+ and OH- ion concentrations that are driven for energy ...
R. W. Armstrong, J. G. Glenn
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1986
Its extreme violence and dramatic appearance make the tornado the object of awe, fear, and wonder. The tornado and its parent thunderstorm (usually a “supercell”) have stimulated much research, both theoretical and applied. Over the past decade or so, several new developments have allowed for great advances in our understanding of the tornado. However,
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Its extreme violence and dramatic appearance make the tornado the object of awe, fear, and wonder. The tornado and its parent thunderstorm (usually a “supercell”) have stimulated much research, both theoretical and applied. Over the past decade or so, several new developments have allowed for great advances in our understanding of the tornado. However,
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Chaotic Tornadogenesis Optimization Algorithm for Data Clustering Problems
International Journal of Software Science and Computational Intelligence, 2018This article describes how clustering is an attractive and major task in data mining in which particular set of objects are grouped according to their similarities based on some criteria. Among the numerous algorithms, k-Means is the best and efficient in address clustering problems.
Ravi Kumar Saidala, Nagaraju Devarakonda
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2007
Tornado structure and dynamics are reviewed. The conditions leading to tornadogenesis also are discussed, as are some of the latest forecasting techniques used to discriminate between tornadic and nontornadic supercells.
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Tornado structure and dynamics are reviewed. The conditions leading to tornadogenesis also are discussed, as are some of the latest forecasting techniques used to discriminate between tornadic and nontornadic supercells.
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Role of Intracloud Lightning in Tornadogenesis
2005Abstract : The role of cloud electrification within supercells and, in particular, the role of lightning in tornadogenesis is re-examined. Rather than cloud-to-ground lightning, it is intracloud lightning that is the culprit for enhancing updraft wind velocities to tornadic levels.
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Observational and Theoretical Aspects of Tornadogenesis
1982The tornado is the most intense atmospheric vortex, and the most mysterious. Many questions still remain about its formation. The field of tornado dynamics has been reviewed recently by DAVIES-JONES (1981). In theoretical work it is generally assumed that the tornado is a vertical vortex, but it is often inclined appreciably.
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Tornadogenesis by Nonprecipitation Induced Wind Shear Lines
Monthly Weather Review, 1986Abstract Five tornadoes occurred within a 40 min period on 18 May 1984 in eastern Colorado. The evolution of these tornadoes was documented by a single Doppler radar, research aircraft, mesonetwork and chase team. Three of these tornadoes were narrow (≈300 m), rotating dust columns extending from the surface to cloud base more than 5 km from the ...
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Tornadogenesis in a Simulated Mesovortex within a Mesoscale Convective System
Journal of the Atmospheric Sciences, 2012Abstract The Advanced 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.
Alan Shapiro +2 more
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Severe Thunderstorm Evolution and Mesocyclone Structure as Related to Tornadogenesis
Monthly Weather Review, 1979Abstract Severe thunderstorm evolution is synthesized, using published and unpublished studies of radar, instrumented aircraft, visual and surface observations. These observations reveal the existence of a downdraft (originating at 7–10 km AGL) on the relative upwind side of the updraft.
Leslie R. Lemon, Charles A. Doswell
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Real Challenge of Data Assimilation for Tornadogenesis
2009Successful recent numerical simulation of tornadogenesis with horizontal resolution of the order of 10 m, O(10 m), and associated temporal resolution of O (0.1 s and 0.01 s for a time-split scheme) requires a vast amount of computer time, impractical to use the simulation model for the model constraint of variational data assimilation and ensemble ...
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