An invasion temperature is not a known term. However, there is a term called "temperature inversion" which is a meteorological phenomenon that occurs when the temperature of the atmosphere increases with height instead of decreasing as it normally does. This creates a layer of warm air that traps cooler air near the Earths surface). Temperature inversions can cause weather phenomena such as fog, smog, and hazy horizons, and can affect air quality by trapping pollutants near the ground. Temperature inversions can be caused by a variety of factors, including radiational cooling of the Earths surface, subsidence, and warm air flowing over a large cold water body.