This is manifested by the convection currents
of the granules  and the differential solar rotation observed by Carrington .
 Soundalgekar, V.M., Effects of mass transfer and free convection currents
on the flow past an impulsively started vertical plate, J.
The effects of the permeability parameter (K) and free convection currents
(both Gr and Gm) on the velocity field are shown in Fig.
The answer is that convection currents
are dredging it up from the star's tiny, dense core, where many heavy elements are currently being synthesized as the giant nears the end of its life.
Before their data streams of convection currents
and computer modelling of pressure differentials, weather forecasters would present their prognostications in far more dogmatic fashion.
Scientists think that convection currents
cause tectonic plates to move.
Indeed, convection currents
in the mantle are responsible for most of the volcanic and tectonic processes that we see at Earth's surface.
He thumbs a button and another particle comes into being, tracing helical convection currents
through the mantle as the perspective soars to a point several kilometers above the North Pole.
Then somebody at the table next to you lights up a cigarette and the convection currents
happen to be flowing in your direction.
In certain areas of a glass oven door, convection currents
between the layers of glass are minimized or eliminated in order to avoid excessive temperatures on the outer surface of the door.
This primary structure carries purlins and rafters in the normal way, with the rafters strutted at the same angle as the struts on the tied portals, creating in effect an inverted ridge that acts as a continuous lantern because, above it, the real ridge is defined by a motorized greenhouse glazing system that can be thrown open on hot days to encourage cooling convection currents
. Below, the lantern's lattice warms and filters daylight as it enters the wooden interior, which is a cross between a barn and a concert hail.
In addition, temperature differences between day and night are small and so there are no convection currents
to move the oxygen-rich surface layers to the deeper layers.