\nTemperature inversion is a meteorological phenomenon where temperature increases with increasing altitude, contrary to the usual decrease. Conditions ideal for inversion are typically associated with stable atmospheric conditions that prevent vertical mixing:
\n1. **Long Winter Night:** Allows for maximum radiative cooling of the ground surface.
\n2. **Clear Skies:** Clouds absorb and re-emit outgoing radiation, reducing surface cooling. Clear skies allow for efficient outgoing terrestrial radiation and cooling of the ground and the air directly above it.
\n3. **Still Air:** Wind facilitates mixing of air layers, which disrupts the formation of an inversion layer. Calm or still air allows cold, dense air to accumulate near the surface.
\n4. **Snow Cover:** A snow-covered surface is an excellent radiator and reflector, enhancing cooling.
\n5. **Topography:** Valleys and low-lying areas can trap cold air, leading to strong inversions.<\/p>\nLow air pressure near the ground surface is generally associated with rising air (cyclonic conditions) which promotes mixing and instability, opposing the conditions needed for inversion. High pressure is typically associated with sinking air and stable conditions, which favour inversions.
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