The entire heat capacity of the atmosphere is equal to the top 3.5 meters of the oceans. The remaining 3,700m of the abyss is Earth’s true thermal vault. The truth is, the Earth is a water planet and oceans cover 71% of the surface to an average depth of 2.3 miles. Ocean currents carry warm water from the mid tropics to the northern hemisphere, then the currents return after a round trip of 1,000 years. Without these currents northern Europe would look like Greenland.

https://x.com/PeterDClack/status/2035654095655088354