Earth's big freezes

The non amateur stuff. Hawking, black holes, that sort of thing

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brian livesey
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Earth's big freezes

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Current theories about Earth's ice ages are that they are caused by variations in the obliquity of Earth's axis and eccentricity changes in our planet's orbit around the Sun ( known as Milankovitch cycles ).
Now there's a new kid on the block. Researchers at MIT are saying that huge seismic events in equatorial regions have caused global temperatures to plummet. Colliding tectonic plates have left large areas of oceanic rock exposed that can cool the planet.
The researchers claim that, due to higher temperatures in the tropics, a chemical reaction was triggered that caused the oceanic rocks to absorb massive amounts of carbon dioxide from the atmosphere, which in turn brought a drastic reduction in temperatures and an ice age. The gas absorbing rocks are exposed as "sutures" in the mountain ranges that are formed by colliding tectonic plates.
Geologist Dr. Oliver Jagoutz at MIT, who led the research team, said: "We found that every time there was a peak in the suture zone in the tropics, there was a glaciation event. So every time you get, say, 10,000km of sutures in the tropics, you get an ice age."
Last edited by brian livesey on Mon Mar 18, 2019 10:51 am, edited 3 times in total.
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Brian
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Re: Earth's big freezes

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WoW! Got a reference to this please? Cheers,
Brian
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brian livesey
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Re: Earth's big freezes

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Here's the source material: news.mit.edu/2019/techtonics-tropics-trigger-ice-ages-0314 .
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Re: Earth's big freezes

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Sorry Brian, I get "page not found". I tried a search but no joy there either,

regards,
Brian
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brian livesey
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Re: Earth's big freezes

Post by brian livesey »

Okay Brian, just type in: "MIT and ice ages".
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Re: Earth's big freezes

Post by Brian »

Got it this time :) . Many thanks,
Brian
52.3N 0.6W
Wellingborough UK.

254mm LX90 on Superwedge, WO ZS66SD, Helios 102mm f5 on EQ1, Hunter 11x80, Pentax 10x50
ASI120MC Toucam Pros 740k/840k/900nc mono, Pentax K110D
Ro-Ro roof shed

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