How an ice age begins and ends

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

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brian livesey
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How an ice age begins and ends

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A recent theory of how the ice age began challenges the theory of Milankovitch cycles, by saying that gases released by volcanic activity, dissolving rocks in mountain sutures, cooled the atmosphere. Now, a new theory complements the first by explaining how the last ice age ended.
It's been known for some time that a rise in carbon emissions played a role in ending the last ice age, but what mechanism caused the rise? Researchers studying deep-sea corals say the change was linked to very rapid changes in ocean currents around Antarctica.
"We found that the ocean around Antarctica can suddenly switch its circulation to deliver 'burps' of CO2 into the atmosphere," said Dr. James Rae, of the School of Environmental and Earth Sciences at the University of St. Andrews. Professor Laura Robinson, of the University of Bristol, added that the study, published in "Science Advances", "shows that deep ocean circulation can change surprisingly rapidly".
brian
Cliff
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Re: How an ice age begins and ends

Post by Cliff »

Brian
I'm afraid this issue is way beyond my brain power, but I feel inclined to comment.
Perhaps sadly I have been feeling for quite some time that the increasing use of computers in recent years has resulted in some aspects of science advancing too quickly. In particular this applies to subjects that might be of some interest to me - astronomy & cosmology. Do not get me wrong - I have to admit that even I find "computers" handy somtimes eg doing photography (I recall long ago I helped my Dad developing films in our dark cellar & I thought photography wasn't for me), but I did like taking photos & then computers changed things a lot (although meantime I had been getting my films developed at a local chemist).
I am really pretty hopeless using computers myself, so that prejudices me. However, these days there is so much computer simulation-logy. Which makes me wonder where we or perhaps I should say "They are going !"
Arguably since I am getting on a bit in age , why should it bother me anyway.
However, that said, I have to say I find some aspects of the "ice age problem" more confusing than interesting.
Best wishes from Cliff
brian livesey
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Re: How an ice age begins and ends

Post by brian livesey »

Just make sure you have enough winter woolies Cliff, when the next ice age comes along :wink: .
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