What is defined as an isobar divergence?

An isobar divergence refers to the situation when isobars, which are lines of equal pressure on a weather map, move away from each other. This phenomenon indicates a decrease in atmospheric pressure in that region, leading to areas of low pressure. In meteorology, a divergence of isobars typically signifies that the air is rising, which can be associated with the development of storm systems or inclement weather.

In contrast, when isobars move toward each other, it indicates an increase in pressure and typically suggests tightening pressure gradients, which can lead to stronger winds. When isobars are parallel, it usually indicates a uniform pressure distribution and a stable weather pattern. Isobars crossing each other is a rare occurrence and generally not seen in standard atmospheric maps, as it would imply an unrealistic situation of equal pressures at the same points in different locations.

Recognizing these differences in isobar behavior is crucial for understanding weather patterns and making accurate predictions in meteorology.