Pressure-gradient force is a physical force that arises due to differences in air pressure across a given space in the atmosphere. It is a key factor in meteorology and fluid dynamics, as it influences wind patterns and the movement of air masses. Here are the main points about the pressure-gradient force: 1. **Definition**: The pressure-gradient force acts from areas of higher pressure to areas of lower pressure, causing air (or any fluid) to move in response to these differences.
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A spatially varying pressure exerts net force per unit volume on a small fluid element. Its contribution to acceleration is . Pressure increases in the direction opposite to this force.