Because of the Earth's rotation induced coriolis effect, all northern hemisphere cyclonic circulations rotate in a counter-clockwise spiral and all those in the southern hemisphere rotate in a clockwise spiral.
(the Earth's rotation; induced; coriolis effect) (cyclonic circulations; rotate; L:in a counter-clockwise spiral) (all northern hemisphere cyclonic circulations rotate in a counter-clockwise spiral and all those in the southern hemisphere; rotate; L:in a clockwise spiral)
the Earth's rotation cyclonic circulations all northern hemisphere cyclonic circulations rotate in a counter-clockwise spiral and all those in the southern hemisphere
induced rotate rotate
coriolis effect
L:in a counter-clockwise spiral
L:in a clockwise spiral