<span>A climate cycle in the Pacific Ocean with a global impact on weather patterns is called El Nino. The cycle begins when warm water in the western tropical Pacific Ocean and shifts eastward along the equator toward the coast of South America.
La Nina has cooler temperatures, not warmer ones. Temperature inversion is just a simple change of temperature. And global warming doesn't fit here as it is not a type of current.</span>
It is showing the most populated areas at that time range
The answer is; Atmospheric circulation patterns keep the temperature of an area constant.
The atmospheric circulation does not keep the temperatures in an area constant, however, they regulate temperatures through convection currents. Hot air rises as cold air mass sinks to replace the rising hot less dense air. These currents transfer energy around the globe and prevent one area from overheating.
I know one is France for sure I think the other is Russia