Because the last few ice ages were in diffrent regions, is it possible these are because of the earths poles shifting, causing new polar regions?
2007-10-18 13:24:54 · 4 answers · asked by SwiftKill 4 in Science & Mathematics ➔ Earth Sciences & Geology
You get an ice age with the right combination of:
How far the axis is tilted
How eccentric is the earth's orbit
At what time of year is the earth closest to the sun
These things go through cycles. For example, right now the axis is tilted 23.5 degrees which is more than usual, the earth's orbit is not too eccentric, and the Northern Hemisphere is in winter when the earth is closest to the sun (therefore milder winters in the north and hotter summers in the southern hemisphere).
In addition, you need land at the geographic poles to allow continental glaciers to grow and spread. Right now there are such glaciers on Greenland and Antarctica, but they can't spread anywhere.
The continental glaciers of the Pleistocene spread over circumpolar Asia, Europe, and North America, as well as some in mountainous regions.
400 million years ago there were continental glaciers in what is now Brazil, which then was near the North Pole.
2007-10-18 14:46:14 · answer #1 · answered by Howard H 7 · 0⤊ 0⤋
The poles shifting doesnt trigger ice ages. They shift magnetic north and south. Polar regions are undefined. They could be anywhere. Think of the snowball earth theory.
2007-10-18 13:59:31 · answer #2 · answered by Anonymous · 0⤊ 0⤋
that's no longer "reality", no longer backed by skill of knowledge, it truly is from my own expertise and instinct, in case you will. we are at the instant traveling by way of an area of the galaxy that has an better density of be counted, and it truly is heating our planet because of the better shooting of the solar's skill. it relatively is going to additionally correspond with an larger style of sightings of meteors and meteorites which will endanger us (we are arranged for it, bless Hollywood for making us loopy paranoid approximately such activities). while the point of particulate be counted decreases, greater of our skill will bleed out into area, much less would be saved in the instantaneous area of our planet and celeb device and the temperature will drop. it truly is an exceedingly great cycle, geological in nature, yet it is the rationalization for the ice a while and the hotter classes.
2016-10-13 03:10:21 · answer #3 · answered by ? 4 · 0⤊ 0⤋
Not a lot is really known about this at this time but if what you are saying is correct it indicates current theories don't fit the facts.
2007-10-18 13:31:09 · answer #4 · answered by jim m 5 · 0⤊ 0⤋