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Antarctica Has a Massive Gravity Hole — and It Dates Back 70 Million Years
7 Articles
7 Articles
The 3-D Secrets of the “Gravity Hole” Under Antarctica
From space, planet Earth looks like a perfect sphere. But it’s not. Obviously, the crust of the Earth is irregular, covered in jagged mountains and deep oceanic trenches, but even if it were completely smooth and covered in water, the surface of this hypothetical ocean planet would still show some variations. Nautilus Members enjoy an ad-free experience. Log in or Join now . That’s because of differences beneath the crust of the Earth. Differe…
The strength of gravity isn't uniform across the planet. Recent research published in the journal Scientific Reports sheds new light on the mysterious "gravity hole" beneath Antarctica. It turns out that this is where gravity is weakest on Earth—all due to the slow, tens of millions of years-long movements of rocks deep beneath the surface of our planet.
Gravity on Earth is not the same everywhere - its force varies with the mass and density of rocks in the mantle. It is the difference in the density of rocks in the bowels of the planet that gradually affects the distribution of water in the oceans.
A Three Thousand Kilometer Deep Structure Is Reshaping Antarctica’s Gravity Field
The weakest gravity on the planet lies beneath Antarctica once the influence of Earth’s rotation is removed. A precise calculation exposes a deep depression in the planet’s gravitational field anchored under the Ross sector. It is not a surface artifact and not a product of ice loss. It is tied to the interior of the […] The post A Three Thousand Kilometer Deep Structure Is Reshaping Antarctica’s Gravity Field appeared first on Above The Norm Ne…
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