Debategraph map: Increase in CO2 has always followed not led rises in temperature *

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Case for significant anthropogenic forcing remains unclear *

The case for significant anthropogenic forcing of the climate remains unclear. (#5041)

Increase in CO2 has always followed not led rises in temperature *

Ice-cores dating back nearly one million years show a pattern of temperature and CO2 rise at roughly 100,000-year intervals. But the CO2 rise has always come after the temperature rise, not before, presumably as warmer temperatures have liberated the gas from oceans. (#14791)

CO2 lagged behind temperature in Ice Age long term variability

There is a positive feedback loop, where higher temperatures started by Malinkovitch cycles, led to more CO2 (from forest fires & outgassing from the oceans) which leads to more warming. The duration of these cycles cannot be explained without factoring in CO2 -induced warming. (#63042)

Largely true but irrelevant as situation quite different now

Largely true: but irrelevant as situation today's quite different. The extra CO2 in the atmosphere—35% increase over pre-industrial levels—is from human emissions. Levels are higher than have been seen in 650,000 years of ice-core records, and are possibly higher than any time since 3m years ago. (#14792)