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To: Slagle who wrote (22161)	9/9/2007 4:17:45 PM
From: Moominoid	Read Replies (1) \| Respond to of 218169

This is more or less correct. CO2 and CH4 levels were much higher during interglacials than during glacials. They served to accentuate the effect of changes in effective solar radiation. Insolation has also been falling since the peak of his interglacial until it was countered by rising greenhouse gases. Based on this data from the ice ages the system is incredibly sensitive to changes in greenhouse gases. But there are long (on a human lifespan scale) lags in warming the atmosphere in response due to the need to also warm up the oceans. So we are only seeing a small part yet of the effect of the greenhouse gases we've been adding in recent decades. I agree that we don't understand everything about climate fluctuations. This fact means we should be all the more cautious in fooling around with the system when we only have a vague idea of its sensitivity to greenhouse gases.