- vertical vorticity
- 垂直涡度
Atmospheric Sciences (English-Chinese) dictionary. 2014.
Atmospheric Sciences (English-Chinese) dictionary. 2014.
Vorticity — is a mathematical concept used in fluid dynamics. It can be related to the amount of circulation or rotation (or more strictly, the local angular rate of rotation) in a fluid.Clancy, L.J., Aerodynamics , Section 7.11] The average vorticity zeta… … Wikipedia
vorticity — is a measure of rotation in the atmosphere, or “spin,” in the air. If the spin, as viewed from above, is counterclockwise in the Northern Hemisphere, it is called a vorticity cyclonic and given a positive value. If the spin is clockwise, it is… … Aviation dictionary
Barotropic vorticity equation — A simplified form of the vorticity equation for an inviscid, divergence free flow, the barotropic vorticity equation can simply be stated as:frac{D eta}{D t} = 0,where frac{D}{D t} is the material derivative and:eta = zeta + fis absolute… … Wikipedia
Rear flank downdraft — The rear flank downdraft or RFD is a region of dry air wrapping around the back of a mesocyclone in a supercell thunderstorm. These areas of descending air are thought to be essential in the production of many supercellular tornadoes. Large hail… … Wikipedia
Omega equation — The omega equation is of great importance in meteorology and atmospheric physics. It is a partial differential equation for the vertical velocity, ω, which is defined as a Lagrangian rate of change of pressure with time, that is, . The equation… … Wikipedia
Greek letters used in mathematics, science, and engineering — Greek alphabet Αα Alpha Νν Nu Ββ Beta … Wikipedia
Eyewall replacement cycle — Concentric eyewalls seen in Hurricane Katrina as it travels west through the Gulf of Mexico. Eyewall replacement cycles, also called concentric eyewall cycles, naturally occur in intense tropical cyclones, generally with winds greater than… … Wikipedia
Tornadogenesis — A sequence of images showing the birth of a supercellular tornado. First, the rotating cloud base lowers. This lowering becomes a funnel, which continues descending while winds build near the surface, kicking up dust and other debris. Finally,… … Wikipedia
Fire whirl — A fire whirl, colloquially fire devil or fire tornado, is a phenomenon in which a fire, under certain conditions (depending on air temperature and currents), acquires a vertical vorticity and forms a whirl, or a tornado like effect of a… … Wikipedia
Feuchtekonvektion — Tornado, 1949 in Kansas (USA) Ein Tornado (spanisch tornar „umkehren, wenden“, Partizip tornado; tornear „wirbeln, drechseln“), auch Großtrombe, Wind oder Wasserhose, in den USA umgangssprachlich auch Twister genannt, ist ein kleinräumiger… … Deutsch Wikipedia
Großtrombe — Tornado, 1949 in Kansas (USA) Ein Tornado (spanisch tornar „umkehren, wenden“, Partizip tornado; tornear „wirbeln, drechseln“), auch Großtrombe, Wind oder Wasserhose, in den USA umgangssprachlich auch Twister genannt, ist ein kleinräumiger… … Deutsch Wikipedia