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Ice Ages


Ice Ages22-03-2017 16:32
James_
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(801)
The link is to a story about what Ice Core samples have told scientists. They say that when there was an increase of 250% more Ice Ages with an increase of less than 30 ppm of CO2. And that is when our planet was warmer.
And with pre-industrialization levels of CO2 being around 280 ppm, we had a cooler planet with fewer Ice Ages. They have yet to explain how a warmer planet has 2 1/2 times more Ice Ages. The 2nd link is to volcanoes on the sea floor in the Arctic Ocean which are releasing a lot of heat. At the present moment it is only my speculation that I believe that glaciers help to limit the amount of heat that the North Atlantic Ridge releases effects the frequency of Ice Ages.


https://phys.org/news/2015-05-ice-cores-atmospheric-million-years.html

https://www.iceagenow.info/underwater-volcanoes-melting-arctic-ice-says-geologist/
22-03-2017 17:28
still learning
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(244)
James_ wrote:
.....They say that when there was an increase of 250% more Ice Ages.....


That is not what the article you linked to says.

Read it again. Or try to read the actual journal article that the Physorg article summarized and simplified.
See http://www.pnas.org/content/112/22/6887.full
22-03-2017 19:24
James_
★★★☆☆
(801)
still learning wrote:
James_ wrote:
.....They say that when there was an increase of 250% more Ice Ages.....


That is not what the article you linked to says.

Read it again. Or try to read the actual journal article that the Physorg article summarized and simplified.
See http://www.pnas.org/content/112/22/6887.full


still learning,
They did say that. What's missing is a timeline. Anyone who reads any article on the million year old ice bubbles needs to do that. Then they'll see more co2 = more Ice Ages.

Jim
22-03-2017 21:13
James_
★★★☆☆
(801)
@All,
Another link

http://www.livescience.com/50795-antartica-old-ice-climate-change.html

In the oldest ice, levels of the greenhouse gas were about 30 parts per million (ppm) higher, at most, than more recent measurements from between 800,000 to 450,000 years ago, according to the findings, reported today (May 11)

About 1 million years ago, Earth's ice ages would wax and wane on a roughly 40,000-year cycle, different than today. After around 800,000 years ago, the planet entered a cooler climate phase and the ice ages shifted to a 100,000-year cycle.




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