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<blockquote data-quote="lindisfel" data-source="post: 2224143" data-attributes="member: 57698"><p>Hi Oldvatr,</p><p>From what I have read, the long term change in the base line co2 for the interglacials (280ppm) does not alter immediately after the temperature drops at the start of an Ice age. The Ice age is not due to low co2 its due to more snow and ice cover and the changed albedo of Earth. Glacier start to appear in Scotland and in the Lake District. Eventually ice sheets reach the south of England deep in the Ice ages. Vast areas of land appear where the flooded continental shelves are now, like off Africa.</p><p></p><p>The change in co2 downwards was gradual due to the Earths processes, as if the Earth were working to a new set point for temperature.</p><p>It was positive feedback in the negative temperature direction....the 800 year process therefore reinforces the Ice ages reducing temperature further due to the lost part of the no longer trapped heat.</p><p></p><p>And the same was true in reverse.</p><p></p><p>Today with man fixing a new set point for co2 the temperature works towards this point quickly because the affect is to trap more heat immediately.</p><p>What people don't realize is the implication from the ice cores, that it takes hundreds of years for the Earth to process the extra 120ppm co2 man has produced and get the co2 down again, (our contribution since preindustrial times).</p><p></p><p>It would be great if man could find a fix to remove co2 down to 280ppm, else we are in for problems long term.</p><p></p><p>I don't like the idea of changing Earth's albedo by modifying clouds, its not a fix, it would change temperature, but we do not know what it would do to the climate, it's playing God and very risky and man may regret it.</p><p></p><p>Not being a chemist, I accept that co2 going into the oceans does produce carbonic acid.</p><p></p><p>There is some discussion in a paper on the high co2 over 50 million years ago....that it was the temperature increase that had more affect on the vulnerable shellfish species through ecosystem change rather than their problems producing shells due to carbonic acid.</p><p>D.</p></blockquote><p></p>
[QUOTE="lindisfel, post: 2224143, member: 57698"] Hi Oldvatr, From what I have read, the long term change in the base line co2 for the interglacials (280ppm) does not alter immediately after the temperature drops at the start of an Ice age. The Ice age is not due to low co2 its due to more snow and ice cover and the changed albedo of Earth. Glacier start to appear in Scotland and in the Lake District. Eventually ice sheets reach the south of England deep in the Ice ages. Vast areas of land appear where the flooded continental shelves are now, like off Africa. The change in co2 downwards was gradual due to the Earths processes, as if the Earth were working to a new set point for temperature. It was positive feedback in the negative temperature direction....the 800 year process therefore reinforces the Ice ages reducing temperature further due to the lost part of the no longer trapped heat. And the same was true in reverse. Today with man fixing a new set point for co2 the temperature works towards this point quickly because the affect is to trap more heat immediately. What people don't realize is the implication from the ice cores, that it takes hundreds of years for the Earth to process the extra 120ppm co2 man has produced and get the co2 down again, (our contribution since preindustrial times). It would be great if man could find a fix to remove co2 down to 280ppm, else we are in for problems long term. I don't like the idea of changing Earth's albedo by modifying clouds, its not a fix, it would change temperature, but we do not know what it would do to the climate, it's playing God and very risky and man may regret it. Not being a chemist, I accept that co2 going into the oceans does produce carbonic acid. There is some discussion in a paper on the high co2 over 50 million years ago....that it was the temperature increase that had more affect on the vulnerable shellfish species through ecosystem change rather than their problems producing shells due to carbonic acid. D. [/QUOTE]
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