ADVECTION

n. horizontal current, horizontal flow (of air, water, etc.); horizontal movement of weather and atmospheric properties (Meteorology); rate of horizontal current

Advection is transport in a fluid. The fluid is described mathematically for such processes as a vector field, and the material transported is described as a scalar concentration of substance, which is present in the fluid. A good example of advection is the transport of pollutants or silt in a river: the motion of the water carries these impurities downstream (see pigpen problem). Another commonly advected substance is heat, and here the fluid may be water, air, or any other heat-containing fluid material. Any substance, or conserved property (such as heat) can be advected, in a similar way, in any fluid.
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Noun
1. (meteorology) the horizontal transfer of heat or other atmospheric properties
(hypernym) temperature change
(derivation) advect
(classification) meteorology

n. advection, horizontal current, horizontal flow (of air, water, etc.); horizontal movement of weather and atmospheric properties (Meteorology)

Transport of an atmospheric property by the wind. See cold advection , moisture advection , warm advection .