convection current

(electronics) The time rate at which the electric charges of an electron stream are transported through a given surface.
(geophysics) Mass movement of subcrustal or mantle material as the result of temperature variations.
(meteorology) Any current of air involved in convection; usually, the upward-moving portion of a convection circulation, such as a thermal or the updraft in cumulus clouds. Also known as convective current.

The transfer of heat that results from the movement of air from one location to another, usually as a result of a stream of air produced by thermal convection caused by differences in temperature.