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Advances in Science and Research Contributions in Applied Meteorology and Climatology
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Volume 3, issue 1
Adv. Sci. Res., 3, 17–21, 2009
https://doi.org/10.5194/asr-3-17-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.
Adv. Sci. Res., 3, 17–21, 2009
https://doi.org/10.5194/asr-3-17-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

  02 Apr 2009

02 Apr 2009

Tornado funnel-shaped cloud as convection in a cloudy layer

M. V. Zavolgenskiy1 and P. B. Rutkevich2 M. V. Zavolgenskiy and P. B. Rutkevich
  • 1Water Problems Institute RAN, South Department, RAN, 198 Stachka av., Rostov-on-Don, Russia
  • 2Space Research Institute (IKI) RAN, Moscow, Russia

Abstract. Analytical model of convection in a thick horizontal cloud layer with free upper and lower boundaries is constructed. The cloud layer is supposed to be subjected to the Coriolis force due to the cloud rotation, which is a typical condition for tornado formation. It is obtained that convection in such system can look as just one rotating cell in contrast to the usual many-cells Benard convection. The tornado-type vortex is different from spatially periodic convective cells because their amplitudes vanish with distance from the vortex axis. The lower boundary at this convection can substantially move out of the initially horizontal cloud layer forming a single vertical vortex with intense upward and downward flows. The results are also applicable to convection in water layer with negative temperature gradient.

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