| Kasz216 said: Which is the point however, if the CO2 plays a HUGE feedback mechanic then the problem should be worse because of record outputs with less carbon sink abilties. Yet there isn't. Though the problem with the historical records is... they aren't exact and a prone to alteration and interptetation. For example the widespread denial of the europeon warm period because of "relative lack of data in non western areas." Even though the data that does exist points to it being warmer in other places as well. The problem is, a lot of the historical data isn't really historical data but historical guesses based on climate models. |
Sorry just to clarify, is your first point referring to the fact that a run-away greenhouse didn't occur in the historical data? If so then yes I agree that it suggests CO2 probably isn't a huge feedback mechanic. At worst I expect it does act to further increase temperature but that either CO2 concentrations become so great that the sinks become greater than the sources (through oceanic uptake and increased silicate rock weathering). Or, perhaps the temperature begins to drop as the orbital variation changes and CO2 consequently goes down suggesting that temperature really is the main driving force and CO2 is relatively 'ineffective'.
Yes the historical data is based on climate models but these models are reasonable enough to trust the data (within a margin of error) as they are backed up by numerous isotopic and organic proxies.
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