Why one part of earth is heating up while another freezes; Details here

Scientists from the University of Oslo have discovered that the region beneath the Pacific Ocean is cooling significantly faster than the region beneath Africa. Over the past 400 million years, the Pacific side has lost about 50 Kelvin more heat than other parts of the Earth.

New Delhi: Deep beneath our feet, the Earth is powered by an immense reservoir of heat-fueling volcanoes, driving plate tectonics, and sustaining the magnetic field that protects life. But new research suggests that this internal heat is not escaping evenly across the planet.

Scientists from the University of Oslo have discovered that the region beneath the Pacific Ocean is cooling significantly faster than the region beneath Africa. Over the past 400 million years, the Pacific side has lost about 50 Kelvin more heat than other parts of the Earth.

This uneven cooling could have long-term consequences for the planet’s geological activity and stability.

A Story That Begins with Pangea

To understand this imbalance, researchers looked back 400 million years-when Earth’s continents were joined into a single supercontinent, Pangea. Using advanced computer models, they traced how heat moved through the planet over time.

They divided Earth into two broad zones:

• The African Hemisphere
• The Pacific Hemisphere

Their findings show that Earth has never cooled uniformly-this imbalance has deep historical roots tied to shifting continents and ocean formation.

A Planet of Extremes: “Thermos” vs “Refrigerator”

The difference comes down to one key factor: crust thickness.

Oceanic crust (Pacific region): Thin and covered by cold seawater, which efficiently absorbs and carries away heat.
Continental crust (Africa, Asia): Thick and dense, acting like insulation that traps heat inside.

In simple terms:

• The Pacific behaves like a refrigerator, rapidly losing heat.
• Continents behave like a thermos, holding heat in.

Because oceans cover about 71% of Earth’s surface-and the Pacific Ocean alone spans roughly 30%-this cooling effect is massive.

Why the Ocean Dominates Heat Loss

Most of Earth’s internal heat escapes through the oceanic lithosphere. The reasons are straightforward:

• The ocean floor is thinner than continental crust
• Cold seawater accelerates heat transfer
• Constant tectonic activity exposes new hot material

Ironically, the Pacific-Earth’s most geologically active region-is also where heat is escaping the fastest.

What This Means for Earth’s Future

Scientists believe that regions now covered by the Pacific may once have been continental. When those areas transitioned into ocean basins, they began losing heat much more rapidly.

This uneven cooling matters because Earth’s internal heat powers:

• Volcanoes
• Plate tectonics
• The magnetic field

Over billions of years, as the planet continues to cool, these systems could weaken. In the far future, Earth may begin to resemble Mars-a cold, geologically inactive world without a protective magnetic shield.

However, this transformation won’t happen all at once. Different regions will cool at different rates, meaning Earth’s evolution will remain uneven and dynamic for a very long time.

The Big Takeaway

Earth isn’t cooling like a uniform sphere-it’s behaving more like a patchwork system, with some regions losing heat rapidly while others retain it.

This discovery doesn’t signal immediate danger, but it does reshape how scientists understand the planet’s deep interior-and its distant future.