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'True polar wander' may have caused ice age
phys.org ^ | November 19, 2018, | Rice University

Posted on 11/20/2018 5:32:39 PM PST by BenLurkin

Like any spinning object, Earth is subject to centrifugal force, which tugs on the planet's fluid interior. At the equator, where this force is strongest, Earth is more than 26 miles larger in diameter than at the poles. Gordon said true polar wander may occur when dense, highly viscous bumps of mantle build up at latitudes away from the equator.

If the mantle anomalies are massive enough, they can unbalance the planet, and the equator will gradually shift to bring the excess mass closer to the equator.

The planet still spins once every 24 hours and true polar wander does not affect the tilt of the Earth's spin axis relative to the sun. The redistribution of mass to a new equator does change Earth's poles, the points on the planet's surface where the spin axis emerges.

Earth is still in an ice age that began about 3.2 million years ago. Earth's poles have been covered with ice throughout the age, and thick ice sheets periodically grow and recede from poles in cycles that have occurred more than 100 times. During these glacial cycles, ice has extended as far south as New York and Yellowstone National Park. Earth today is in an interglacial period in which ice has receded toward the poles.

Gordon said true polar wander is not merely a change in the location of Earth's magnetic poles.... The paleomagnetic record, which is often used to study the movement of tectonic plates across Earth's surface, contains many instances of "apparent polar wander," which tracks the motion of the spin axis and which includes the effects of both plate motion and true polar wander, Gordon said

(Excerpt) Read more at phys.org ...


TOPICS: Miscellaneous
KEYWORDS: catastrophism; charleshapgood; continentaldrift; crustaldisplacement; glaciation; joekirschvink; magnetism; paleomagnetism; pirireis; platetectonics; poleshift; randflemath; roseflemath; truepolarwander
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To: ProtectOurFreedom

Thanks for the reply.

I’d say that volcanoes are many times the threat of global warming, but how can politicians run a scam to steal trillions based on that threat?


21 posted on 11/20/2018 6:32:57 PM PST by Moonman62 (Give a man a fish and he'll be a Democrat. Teach a man to fish and he'll be a responsible citizen.)
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To: BenLurkin
'True polar wander' may have caused ice age

And, every time the polar-wander occurs, it's because of global warming. Or is it climate change?

We have to figure out a way to control polar wander, through climate control.

Perhaps we can control polar-wander by moving people to the other side of the planet, opposite the shifting of the earth's mass.

Anytime the planet's mass shifts, we could move all liberals and progressive and communists and Muslims to the opposite side, to prevent the poles from wandering off.
22 posted on 11/20/2018 6:34:23 PM PST by adorno
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To: Beowulf9

“I wonder if this could cause enough unbalance to make another polar wander.”

Interesting question.


23 posted on 11/20/2018 6:36:42 PM PST by neverevergiveup
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To: Moonman62
“A fact that Al Gore doen’t want you to know.”

Al Gore isn't a scientist. It would be difficult for him to try to hide what he doesn't understand

24 posted on 11/20/2018 6:38:28 PM PST by neverevergiveup
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To: blam

Plasma, Solar Outbursts, and the End of the Last Ice Age
The Official Website thereof | prior to July 15, 2011 | Dr. Robert M. Schoch
Posted on 07/15/2011 10:15:16 AM PDT by SunkenCiv
http://www.freerepublic.com/focus/chat/2749085/posts


25 posted on 11/20/2018 6:58:24 PM PST by SunkenCiv (and btw -- https://www.gofundme.com/for-rotator-cuff-repair-surgery)
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To: UCANSEE2; Beowulf9

26 posted on 11/20/2018 7:01:26 PM PST by SunkenCiv (and btw -- https://www.gofundme.com/for-rotator-cuff-repair-surgery)
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To: BenLurkin

Precession of the earth
https://www.youtube.com/watch?v=qlVgEoZDjok


27 posted on 11/20/2018 8:41:30 PM PST by minnesota_bound
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To: BenLurkin

Santa Claus - a migrant!
Who knew!


28 posted on 11/20/2018 8:42:54 PM PST by oldbill
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To: BenLurkin
If the mantle anomalies are massive enough, they can unbalance the planet, and the equator will gradually shift to bring the excess mass closer to the equator.

So if the Earth keeps spinning long enough it will flatten out and finally the flat-earthers will be right.

29 posted on 11/20/2018 8:50:17 PM PST by Magnum44 (My comprehensive terrorism plan: Hunt them down and kill them)
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To: BenLurkin

It’s centripetal force, not centrifugal.


30 posted on 11/20/2018 10:14:44 PM PST by Paal Gulli
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Comment #31 Removed by Moderator

To: BenLurkin
If the mantle anomalies are massive enough, they can unbalance the planet, and the equator will gradually shift to bring the excess mass closer to the equator.

The planet still spins once every 24 hours and true polar wander does not affect the tilt of the Earth's spin axis relative to the sun. The redistribution of mass to a new equator does change Earth's poles, the points on the planet's surface where the spin axis emerges.

Okay, this makes sense, but I don’t see an ice age as an inevitable result.

This to me is an attempt by the Global Warmist to discredit Sun Spot minimums as being the cause of the ice ages.

32 posted on 11/21/2018 1:58:41 AM PST by Pontiac (The welfare state must fail because it is contrary to human nature and diminishes the human spirit.)
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To: ProtectOurFreedom

The first event you mention was likely caused by a comet fragment (like the one that likely hit 1000 years prior), and the later sounds like some major volcanic event with VEI of 7-8 or greater.


33 posted on 11/21/2018 2:23:00 AM PST by PIF (They came for me and mine ... now it is your turn ...)
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To: UCANSEE2; Beowulf9
"So, I have recently read that Earth is swallowing TRILLIONS of tons of water into its interior as tectonic plates collide beneath the ocean."

The Earth is going to be up all night going to the bathroom.

34 posted on 11/21/2018 3:35:27 AM PST by outofsalt (If history teaches us anything, it's that history rarely teaches us anything.)
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To: ProtectOurFreedom

This is a good overview, https://geology.utah.gov/map-pub/survey-notes/glad-you-asked/ice-ages-what-are-they-and-what-causes-them/


35 posted on 11/21/2018 3:40:01 AM PST by outofsalt (If history teaches us anything, it's that history rarely teaches us anything.)
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