The movement of a substance like heat or moisture through the air or water by horizontal flow, without any mixing or stirring.
From Latin 'advectio,' meaning 'carrying toward,' derived from 'advehere' (ad- 'to' + vehère 'to carry'). The term entered English through scientific terminology in the 19th century to describe atmospheric and oceanic transport processes.
Advection is why warm air from the south can suddenly arrive in your city bringing warmer weather, and it's a crucial process meteorologists track to predict changes in temperature and rainfall. Without advection, weather patterns would be completely different!
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