How do you calculate the Pressure Gradient Force (PGF)?

The Pressure Gradient Force (PGF) is a fundamental concept in meteorology that describes the force resulting from differences in atmospheric pressure across a distance. It is calculated using the difference in pressure divided by the distance over which that pressure change occurs. This relationship allows meteorologists to understand how pressure creates movement in the atmosphere, which contributes to wind and weather patterns.

When pressure changes significantly over a short distance, the PGF is strong, leading to faster winds. Conversely, a small pressure difference over a long distance results in a weaker PGF and slower winds. The formula captures this relationship effectively, reflecting that the greater the pressure change (numerator), and the smaller the distance (denominator), the stronger the resulting force. Hence, the correct calculation is the difference in pressure divided by distance.