Patches of less hot gases in the atmosphere are called cool air pockets, cold pockets, or thermal lows.

Here's why:

* Cool air pockets: This is a general term for areas of air that are cooler than the surrounding air.

* Cold pockets: This term is similar to "cool air pocket" but emphasizes the lower temperature.

* Thermal lows: This term refers to areas of low atmospheric pressure caused by the cooler air. Since cold air is denser, it sinks, creating an area of low pressure.

These pockets can form due to various factors like:

* Convection: Warm air rises, leaving behind cooler air that can form pockets.

* Advection: Cold air moves in from elsewhere, displacing warmer air.

* Nocturnal cooling: The ground cools off at night, cooling the air above it.

Let me know if you'd like more detail on any of these concepts!