Question

Define pressure gradient

Answer 1

The rate of change in atmospheric pressure between two places is called Pressure Gradient.

Answer 2

In atmospheric science (meteorology, climatology and related fields), the pressure gradient (typically of air, more generally of any fluid) is a physical quantity that describes which direction and at what rate the pressure changes the most rapidly around a particular location. The pressure gradient is a dimensional quantity expressed in units of pressure per unit length, or Pa/m

Mathematically, it is obtained by applying the Del operator to a pressure function of position. The negative gradient of pressure is known as the force density