Question

What is the meaning of the term ‘pressure gradient’?

Answer 1

Pressure gradient is defined as the decrease in atmospheric pressure per unit distance in the direction where the pressure decreases most rapidly. In simpler terms, it is the rate of change of atmospheric pressure between two points on the Earth’s surface. On weather maps, the pressure gradient is indicated by the spacing of isobars (lines joining points of equal pressure). When the isobars are close together, it indicates a steep pressure gradient, which results in stronger winds, whereas when they are spaced far apart, it indicates a gentle pressure gradient and weaker winds. Thus, the pressure gradient is the force that causes air to move from high-pressure areas to low-pressure areas, driving the wind and influencing weather patterns.