What characterizes a depression in meteorological terms?

A depression, in meteorological terms, is characterized as a system with the lowest pressure at its center. This low-pressure area is commonly associated with rising air, which can lead to cloud formation and precipitation, making depressions a key feature in weather patterns, particularly in mid-latitude regions.

The fundamental principle behind a depression is that as air rises in a low-pressure zone, it cools, leading to condensation and potentially forming clouds and rain. The gradient between the low-pressure center and surrounding high-pressure areas can also lead to strong winds. Understanding this characteristic is crucial for weather forecasting and recognizing patterns of weather systems.

In contrast, systems with the highest pressure at the center are defined as anticyclones, which typically bring clear skies and stable weather conditions. Hence, the identification of a depression as a low-pressure system is vital in predicting weather outcomes.