The Earth Has No Average Temperature

 The concept of an average temperature of the Earth is a figment of the climate scientist's imagination, conjured up to try to prove a fraudulent hypothesis.  The Earth has no average temperature; the temperature of the Earth is different at every point in time and space.  The Earth is never in thermal equilibrium.  It should be apparent to anyone that if you add two temperatures together and average them, you get a meaningless number.  A calculation of similar value would be to determine the average ZIP code in the United States to locate the average American city (49663 — Manton, Mich., pop. 1,324).

Thermodynamics, the branch of physics that deals with the movement of heat, defines temperature as a proxy for the average kinetic energy of the molecules in a system.

The concept of temperature as a proxy for the kinetic energy of the molecules in a system is derived from the "Kinetic Theory of Gases," which was developed in the 1850s and proven by experimentation in 1947.

Kinetic energy is the energy associated with the motion of an object, such as a golf ball, a moving car, an airplane, or a molecule of air.

How are thermal energy, temperature, and kinetic energy related? When a system gains or loses thermal energy from its surroundings through the transfer of thermal energy, its temperature increases or decreases.

The thermal energy absorbed or lost increases or decreases the kinetic energy of the molecules in the system, causing them to move faster or slower.

As a result, the average kinetic energy of the molecules in the system changes, and we read that change with a thermometer.

If the temperature of the air in a system represents the average kinetic energy of the air molecules in a system, ask yourself this simple question: "How can the kinetic energy of the air molecules in my room affect the kinetic energy of the air molecules in a room halfway around the world? The answer is that it can't! The system that constitutes your room or the atmosphere that surrounds your city is not adjacent to a system halfway around the world! The air molecules in your room or in your city cannot interact with air molecules in a city halfway around the world and affect the kinetic energy of those distant molecules! This fact demonstrates an important concept about heat transfer in a fluid or gas like air. 

https://www.americanthinker.com/articles/2023/09/the_earth_has_no_average_temperature.html