ascending current

as·cend·ing cur·rent

the direction of current flow in a nerve when the anode is placed peripheral to the cathode, in contrast to descending current; the convention used is that current flows from positive to negative.
Synonym(s): centripetal current

ascending current

References in classic literature ?
If during a warm day we look either at the shadow of any object cast on a bank, or over a level plain at a distant landmark, the effect of an ascending current of heated air is almost always evident: such upward currents, it has been remarked, are also shown by the ascent of soap-bubbles, which will not rise in an in-doors room.
The ascending current feeds volcanoes across that broad region, revealing itself with a distinct chemical signature, according to the scientists.
Hot mantle rock starts to rise and gradually forms a huge ascending current under the middle of the land mass.