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From this article: Climate myths: Ice cores show CO2 increases lag behind temperature rises, disproving the link to global warming - environment - 16 May 2007 - New Scientist

Ice cores from Antarctica show that at the end of recent ice ages, the concentration of carbon dioxide in the atmosphere usually started to rise only after temperatures had begun to climb. There is uncertainty about the timings, partly because the air trapped in the cores is younger than the ice, but it appears the lags might sometimes have been 800 years or more.

This proves that rising CO2 was not the trigger that caused the initial warming at the end of these ice ages - but no climate scientist has ever made this claim. It certainly does not challenge the idea that more CO2 heats the planet.

See also:

CO2 lags temperature - what does it mean?

Shakun et al. Clarify the CO2-Temperature Lag

Why Temperature Lags Behind C02 - another "global warming myth" explained | DeSmogBlog

<blockquote data-quote="Trystero" data-source="post: 194119" data-attributes="member: 5950">From this article: <a href="http://www.newscientist.com/article/dn11659-climate-myths-ice-cores-show-co2-increases-lag-behind-temperature-rises-disproving-the-link-to-global-warming.html" target="_blank">Climate myths: Ice cores show CO2 increases lag behind temperature rises, disproving the link to global warming - environment - 16 May 2007 - New Scientist</a>Ice cores from Antarctica show that at the end of recent ice ages, the concentration of carbon dioxide in the atmosphere usually started to rise only <a href="http://dx.doi.org/10.1126/science.1078758" target="_blank">after temperatures had begun to climb</a>. There is uncertainty about the timings, partly because the air trapped in the cores is younger than the ice, but it appears the lags might sometimes have been 800 years or more.This proves that rising CO2 was not the trigger that caused the initial warming at the end of these ice ages - but no climate scientist has ever made this claim. It certainly does not challenge the idea that more CO2 heats the planet.See also:<a href="http://www.skepticalscience.com/co2-lags-temperature.htm" target="_blank">CO2 lags temperature - what does it mean?</a><a href="http://www.skepticalscience.com/skakun-co2-temp-lag.html" target="_blank">Shakun et al. Clarify the CO2-Temperature Lag</a><a href="http://www.desmogblog.com/why-temperature-lags-behind-c02-another-global-warming-myth-explained" target="_blank">Why Temperature Lags Behind C02 - another &quot;global warming myth&quot; explained | DeSmogBlog</a></blockquote>

[QUOTE="Trystero, post: 194119, member: 5950"] From this article: [url="http://www.newscientist.com/article/dn11659-climate-myths-ice-cores-show-co2-increases-lag-behind-temperature-rises-disproving-the-link-to-global-warming.html"]Climate myths: Ice cores show CO2 increases lag behind temperature rises, disproving the link to global warming - environment - 16 May 2007 - New Scientist[/url] [I]Ice cores from Antarctica show that at the end of recent ice ages, the concentration of carbon dioxide in the atmosphere usually started to rise only [URL='http://dx.doi.org/10.1126/science.1078758']after temperatures had begun to climb[/URL]. There is uncertainty about the timings, partly because the air trapped in the cores is younger than the ice, but it appears the lags might sometimes have been 800 years or more. [B]This proves that rising CO2 was not the trigger that caused the initial warming at the end of these ice ages - but [U]no climate scientist has ever made this claim.[/U] It certainly does not challenge the idea that more CO2 heats the planet. [/B][/I] See also: [url="http://www.skepticalscience.com/co2-lags-temperature.htm"]CO2 lags temperature - what does it mean?[/url] [url="http://www.skepticalscience.com/skakun-co2-temp-lag.html"]Shakun et al. Clarify the CO2-Temperature Lag[/url] [url="http://www.desmogblog.com/why-temperature-lags-behind-c02-another-global-warming-myth-explained"]Why Temperature Lags Behind C02 - another "global warming myth" explained | DeSmogBlog[/url] [/QUOTE]

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