Retrieving "Surface Humidity Variations" from the archives

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1. Atmospheric Pressure System

   Linked via "surface humidity variations"

   Low-pressure systems (depressions) are most often associated with surface heating, causing air to expand, decrease in density, and rise (convection). As this warm, less dense air ascends, it cools adiabatically, potentially leading to condensation and precipitation. Conversely, high-pressure systems (anticyclones) typically form where air cools near the surface, increasing its density and c…