Results 121 to 130 of about 444 (139)

Diagnoses of an Axisymmetric Model of Tornadogenesis

A simulation of axisymmetric tornadogenesis is examined in greater detail than was possible in 2008. The results are reanalyzed using three approaches. First, the evolutions of 30 fields are visualized using animations of plots with fixed contours. Second, various properties of a parcel that enters the tornado are graphed versus time.
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Relationships Between Radar-Derived Thermodynamic Variables and Tornadogenesis

Monthly Weather Review, 1984
Abstract A methodology for obtaining pressure perturbations and buoyancy in thunderstorms observed with Doppler radar is described and applied to two tornadic thunderstorms. Extracted thermodynamic information is combined with kinematic analyses to study observed severe storm processes. The intensification of tornado parental circulations (mesocyclones)
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Radar Updraft Proxies for Supercell Tornadogenesis Prediction

The most fundamental feature of a convective storm is its updraft. The updraft plays a crucial role in the life cycle of a storm and the production of its hazards, including tornadoes. Recent studies, mostly using numerical models, have proposed direct links between updraft properties and tornado formation.
Michael French, Erik Creighton, Darrel Kingfield   +2 more
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A New Pathway for Tornadogenesis Exposed By Numerical Simulations of Supercells in Turbulent Environments

Journal of the Atmospheric Sciences
This presentation will summarize and discuss the key findings from a recent numerical modeling study (Markowski 2024, Journal of the Atmospheric Sciences), which examined tornadogenesis in a supercell simulation incorporating a turbulent environmental boundary layer.
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DOW radar studies of the mechanisms for tornadogenesis, maintenance, and dissipation

Case studies of tornadic storms have shown the importance of various sub-storm scale structures, including in updrafts/downdrafts and associated convergence/divergence regions in tornadogenesis and intensification.  But, the existence of the features alone is not sufficient for tornadogenesis.
Karen Kosiba, Joshua Wurman
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Equilibrium Energy and Entropy of Vortex Filaments in the Context of Tornadogenesis and Tornadic Flows

Open Journal of Fluid Dynamics, 2023
Pavel Belík
exaly  

Transition of Near-Ground Vorticity Dynamics During Tornadogenesis

Journals of the Atmospheric Sciences, 2022
Jannick Fischer, Johannes M L Dahl
exaly  

1 On the Development of Near-Ground Rotation During Tornadogenesis

Although isolated supercells rotate aloft soon after storm initiation, they take considerable time to develop significant vertical vorticity near the ground and thereafter a tornado. Without frictional interaction with the ground, only a quasi-tornado forms.
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Tornadogenesis: Our Current Understanding, Forecasting Considerations, and Questions to Guide Future Research

Atmospheric Research, 2009
Yvette Richardson
exaly  

Effects of Microphysical Drop Size Distribution on Tornadogenesis in Supercell Thunderstorms

Geophysical Research Letters, 2008
Nathan Snook, Ming Xue
exaly