PRESSURE GRADIENT- The change in Pressure measured across a given distance is called a “pressure gradient”.
The pressure gradient results in a net force called the “pressure gradient force”.
Pressure Gradient Force is expressed as force per unit volume, directed from high to low pressure:
PGF= Pressure change(mb)/distance(km)
Pressure gradient force, rotation of earth, Coriolis force, frictional force and centrifugal force affect the flow of wind on earth.