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The circulation Γ of a vector field V around a closed curve C is the line integral: [3] [4] =. In a conservative vector field this integral evaluates to zero for every closed curve. That means that a line integral between any two points in the field is independent of the path taken.
In meteorology, air currents are concentrated areas of winds.They are mainly due to differences in atmospheric pressure or temperature.They are divided into horizontal and vertical currents; both are present at mesoscale while horizontal ones dominate at synoptic scale.
In architecture, circulation refers to the way people move through and interact with a building. [1] In public buildings, circulation is of high importance; Structures such as elevators, escalators, and staircases are often referred to as circulation elements, as they are positioned and designed to optimize the flow of people through a building, sometimes through the use of a core.
Latitudinal circulation is a result of the highest solar radiation per unit area (solar intensity) falling on the tropics. The solar intensity decreases as the latitude increases, reaching essentially zero at the poles. Longitudinal circulation, however, is a result of the heat capacity of water, its absorptivity, and its mixing.
Figure 1: The induced horizontal and vertical circulation patterns induced by a horizontal shear flow at the surface of the fluid. The horizontal shear is indicated by the length and colour density of the arrows at the surface of the fluid. This shear in the velocity at the surface leads to both vertical and horizontal circulation patterns.
Atmospheric circulation is the large-scale movement of air, and is a means by which thermal energy is distributed on the surface of the Earth, together with the much slower (lagged) ocean circulation system. The large-scale structure of the atmospheric circulation varies from year to year, but the basic climatological structure remains fairly ...
Cumulus clouds can form in lines stretching over 480 kilometres (300 mi) long called cloud streets. These cloud streets cover vast areas and may be broken or continuous. They form when wind shear causes horizontal circulation in the atmosphere, producing the long, tubular cloud streets. [10]
In meteorological term regarding atmospheric circulation, zonal flow brings a temperature contrast along the Earth's longitude. Extratropical cyclones in zonal flows tend to be weaker, moving faster and producing relatively little impact on local weather. Extratropical cyclones in meridional flows tend to be stronger and move slower.