The amount of rotation, or spin, of the air - also defined as circulation per unit area. Cyclonic vorticity (counter-clockwise spin) is essential for the creation of upper air divergence, rising air, and the development of surface low pressure systems.
the state of a fluid in vortical motion; a measure of vortical motion, especially a vector measure of local rotation in a fluid flow
the tendency of a moving gas or liquid to rotate around an axis, forming a vortex.
A measure of the local rotation in a fluid flow. In weather analysis and forecasting, it usually refers to the vertical component of rotation and is used most often in reference to synoptic scale or mesoscale weather systems.
The amount of rotational motion possessed by it fluid is called its vorticity.
(VORT) -- A quantitative measure of "spin" in the atmosphere.
A fluid property that is defined as twice the local rate of rotation of a fluid element or the curl of the velocity field. It is a three-dimensional property of the field of motion of a fluid, although in large-scale geophysical fluid dynamics the vorticity component in the horizontal plane (i.e. rotation about the vertical axis) is usually the only non-negligible component. In a rotating frame of reference (such as on the Earth) we distinguish between the planetary vorticity ) i.e. the fluid partaking of the vorticity of the Earth at the given latitude, and the relative vorticity, ( ) i.e. the vertical component of the vorticity relative to the rotating frame, where = is the velocity of the rotating frame at position .
A measure of the rotation of air in a horizontal plane. Positive (counter-clockwise or cyclonic) vorticity can be correlated with surface low development and upward vertical motion (in areas of positive vorticity advection).
A measure of the amount of "spin" (or rotation) in the atmosphere.
A measure of local rotation in a fluid flow; the spin of a fluid.
A vector measure of the local rotation in a fluid flow. This can be evidenced by upper air parameter fields as well as the relative circulation observed in satellite imagery.
A measure of rotation in a fluid. Rotation can occur around any axis, but in large-scale dynamic meteorology the vertical component of the vorticity is of most interest.
Spin of the air indicating rotation. Positive vorticity is cyclonic flow, while negative vorticity is anticyclonic.
A scientific term for measuring the turning or spin around a point in space. Look at a satellite loop and you will see a lot of turning and spinning in the cloud masses. This is vorticity, and certain relationships between vorticity and atmospheric flow produce lift in the atmosphere.
The measurement of the rotation of a small air parcel. It has vorticity when the parcel spins as it moves along its path. Although the axis of the rotation can extend in any direction, meteorologists are primarily concerned with the rotational motion about an axis that is perpendicular to the earth's surface. If it does not spin, it is said to have zero vorticity. In the Northern Hemisphere, the vorticity is positive when the parcel has a counterclockwise, or cyclonic, rotation. It is negative when the parcel has clockwise, or anticyclonic, rotation.
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.
