Cyclones
do not origin at the equator ,because the Coriolis force acting the equator is
zero .Some factors are responsible for cyclones do not origin at the equator.
Pressure gradient force
As
the rate of change of pressure with respect to distance also changes ,as more
pressure gradient force more increase in blown of air.
Coriolis force
The
earth rotates with tilt angle from west to east ,the water in the northern
hemisphere moves rightwards and the water in the southern hemisphere moves
leftwards .As the latitude increases coriolis forces increases, thus polar regions
have high coriolis force and equators have less coriolis force.
The
Coriolis force and the pressure gradient force acting perpendicular to each
other ,the pressure gradient forces increases the wind velocity also increases
and deflection towards coriolis force causes weaking of Coriolis force at the
equator.So,cyclones do not origin at the equator.
