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Climate Change

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Category:Science | Tags:climate, weather, climatology, earth, global, warming, co2, greenhouse, effect

Created:on 2008-08-07 | Updated:on 2008-08-07

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'CO2 doesn't lead, it lags' | Gristmill: The environmental news blog | Grist

Tags: climate, change, ice, ages, co2, earth, temperature, climatology on 2008-08-07 -All Annotations (0) -About

more fromgristmill.grist.org
- examination of the CH4, CO2, and temperature fluctuations
  recorded in the Antarctic
  ice core records reveals that, yes, temperature moved first
- for the majority of that time (90% and more), temperature and CO2 rose
  together
- CO2 did not trigger the warmings, but it definitely
  contributed to them
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What does the lag of CO2 behind temperature in ice cores tell us about global warming?

RealClimate

Tags: climate change, ice ages, co2, earth, temperature, climatology on 2008-08-07 -All Annotations (0) -About

more fromwww.realclimate.org
- At least three careful ice core studies have shown that CO₂ starts to rise about 800 years (600-1000 years) after Antarctic temperature during glacial terminations.
- CO₂ could have caused the last 5/6 of the warming, but could not have caused the first 1/6 of the warming
- other factors besides CO₂ affect climate
- Some (currently unknown) process causes Antarctica and the surrounding ocean to warm. This process also causes CO₂ to start rising, about 800 years later. Then CO₂ further warms the whole planet, because of its heat-trapping properties. This leads to even further CO₂ release.
- CO₂ does not initiate the warmings, but acts as an amplifier once they are underway

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