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 ...
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?
“I wonder if this could cause enough unbalance to make another polar wander.”
Interesting question.
Al Gore isn't a scientist. It would be difficult for him to try to hide what he doesn't understand
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
Precession of the earth
https://www.youtube.com/watch?v=qlVgEoZDjok
Santa Claus - a migrant!
Who knew!
So if the Earth keeps spinning long enough it will flatten out and finally the flat-earthers will be right.
It’s centripetal force, not centrifugal.
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.
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.
The Earth is going to be up all night going to the bathroom.
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/
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