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How can tornadoes be produced?
The formation of tornadoes is complicated.First, a condition called wind shear, in which the speed or direction of the wind changes with altitude. If the shear is strong enough it can essentially tilt a thunderstorm, this separates the updraft and downdraft of the thunderstorm, preventing them from interfering with one another. This allows the storm to become stronger and last longer.Additionally, if the wind shear is strong enough it can start the air rolling in what is called horizontal vorticity. This horizontal vorticity can then be turned vertical by a thunderstorm's updraft. When this happens, the thunderstorm may start rotating. The rotation is especially strong in an updraft called a mesocyclone. If the storm intensifies rapidly enough, a relatively warm downdraft called a rear-flank downdraft or RFD can wrap around the bottom part of the mesocyclone. This can then tighten and intensify its rotation and bring it down to the ground to produce a tornado.
How does spinning water make a tornado?
It doesn't. A tornado is a spinning column of air, not water.First, you need thunderstorms, then you need a condition called wind shear, in which the speed or direction of the wind changes with altitude. If the shear is strong enough it can essentially tilt a thunderstorm. This separates the updraft and downdraft of the thunderstorm, preventing them from interfering with one another. This allows the storm to become stronger and last longer.Additionally, if the wind shear is strong enough it can start the air rolling in what is called horizontal vorticity. This horizontal vorticity can then be turned vertical by a thunderstorm's updraft. When this happens, the thunderstorm may start rotating. The rotation is especially strong in an updraft called a mesocyclone. If the storm intensifies rapidly enough, a relatively warm downdraft called a rear-flank downdraft or RFD can wrap around the bottom part of the mesocyclone. This can then tighten and intensify its rotation and bring it down to the ground to produce a tornado.
Why does a tornado spin?
Tornadoes are produced from a rotating updraft called a mesocylcone, which is one of the main features of a powerful type of thunderstorm called a supercell. Supercells form in this way: When the speed and direction of wind changes with altitude it is called wind shear. When this wind shear is strong enough it can start the air rolling along a horizontal axis. If this horizontal vorticity encounters the updraft of a thunderstorm it can get turned vertical. The updraft in turn takes on this rotation and becomes a mesocyclone.
How is an F5 tornado formed?
An F5 tornado forms in much the same way a any other tornado is. For general tornado formation first, a condition called wind shear, in which the speed or direction of the wind changes with altitude. If the shear is strong enough it can essentially tilt a thunderstorm, this separates the updraft and downdraft of the thunderstorm, preventing them from interfering with one another. This allows the storm to become stronger and last longer. Additionally, if the wind shear is strong enough it can start the air rolling in what is called horizontal vorticity. This horizontal vorticity can then be turned vertical by a thunderstorm's updraft. When this happens, the thunderstorm may start rotating. The rotation is especially strong in an updraft called a mesocyclone. If the storm intensifies rapidly enough, a relatively warm downdraft called a rear-flank downdraft or RFD can wrap around the bottom part of the mesocyclone. This can then tighten and intensify its rotation and bring it down to the ground to produce a tornado. An F5 tornado is simply the most extreme case of this where a supercell has an enormous amount of energy, is well organized, and wind shear is very strong.
What is vorticity for irrotational flow?
Zero
What is vortensity of a rotating fluid?
The ratio of vorticity to mass density.
What is vorticity vector?
The vorticity vector is DelxV = v/r sin(RV)H1, the Curl of the vector V. The unit vector H1, is perpendicular to the plane formed by the radius vector R and and the vector V.
Winds are described by their?
Speed, direction, average temperature, steadiness of direction, vorticity.
What has the author J W Naughton written?
J. W. Naughton has written: 'Experiments on the enhancement of compressible mixing via streamwise vorticity. Part l - Optical measurements' -- subject(s): Vorticity, Turbulent mixing
What are some school related words that start with the letter V?
Values, Velocity, Vorticity, Voracity.
What causes a column of air spinning like a roll of toilet paper to turn into a vertical position?
If you are referring to the formation of a mesocyclone, this occurs when the horizontal vorticity meets the updraft. The updraft helps lift the vorticity upwards and in the process tilts the axis from horizontal to vertical.
How does studying a model of something such as a thunderstorm differ from studying the thing itself. How are the two similar?
west wind at 700 millibar transporting dry air, and a northwesterly wind in the upperGreater than 200 knots Incredible divergence150 to 200 knots Large divergence100 to 149 knots Good divergence70 to 99 knots Marginal divergenceLess than 70 knots Small divergence(8) 500 millibar vorticity - Vorticity is a function of trough curvature, earth vorticity, and speed gradients. When using models to assess strength of vorticity you will notice a value is given for the VORT MAX. The higher the value, the higher the potential upper level divergence. Below is a guide to 500 millibar vorticity and upper level divergence. If the values of vorticity are being rapidly advected, divergence will "in the real world" be much more than if the winds through the vorticity maximum are stationary or moving slowly.40+ Incredible divergence30+ Very large divergence20-29 Large divergenceTeens Descent divergenceLess than 12 Low but positive divergenceClick here for a more in-depth presentation on supercell thunderstorm structure and evolution.
What has the author John W Ruge written?
John W. Ruge has written: 'A nonlinear multigrid solver for an atmospheric general circulation model based on semi-implicit semi-Lagrangian advection of potential vorticity' -- subject(s): Atmospheric general circulation models, Lagrangian function, Vorticity
What causes a tornado to turn vertical?
The tornado itself is vertical when it first forms. The rotation that forms it starts out as what is called horizontal vorticity. This vorticity can get caught in the updraft of a thunderstorm, tilting it into a vertical position. The new vertical rotation joins with the updraft to become a mesocyclone. Under the right conditions the mesocyclone can tighten and intensify to produce a tornado.
What has the author Tamara L Townsend written?
Tamara L Townsend has written: 'The influence of convective activity on the vorticity budget' -- subject(s): Convection (Astrophysics)
What do you need to make a fire tornado?
A fire tornado, more properly called a fire whirl, forms in a manner akin to that of a dust devil, only the source of heat is a fire rather than the sun. The ingredients needed for a fire whirl are an intense fire, and wind with some hint of vorticity (spin), which can occur as the wind interacts with the ground and vegetation. The fire creates an updraft which then takes on vorticity, pulling it into a tighter, more intense vortex.
