claim: Doubling the concentration of atmospheric CO2 from its pre-industrial level, in the absence of other forcings and feedbacks, would likely cause a warming of ~0.3°C to 1.1°C.
evidences.evidence_id: Climate change feedback:16
evidences.article: Climate change feedback
evidences.evidence: The higher CO2 levels led to an additional climate warming ranging between 0.1° and 1.5 °C.
evidences.votes: SUPPORTS SUPPORTS
evidences.evidence_id: Climate sensitivity:13
evidences.article: Climate sensitivity
evidences.evidence: Without feedbacks the radiative forcing of approximately 3.7 W/m2, due to doubling CO 2 from the pre-industrial 280 ppm, would eventually result in roughly 1 °C global warming.
evidences.votes: SUPPORTS SUPPORTS
evidences.evidence_id: Climate sensitivity:88
evidences.article: Climate sensitivity
evidences.evidence: Neglecting other forcings and considering the temperature increase to be an equilibrium increase would lead to a sensitivity of about 1.1 °C (2.0 °F).
evidences.votes: NOT_ENOUGH_INFO SUPPORTS
evidences.evidence_id: Global warming:58
evidences.article: Global warming
evidences.evidence: Increased concentrations of gases such as CO 2 (~20%), ozone and N 2O are external forcing on the other hand.
evidences.votes: SUPPORTS SUPPORTS
evidences.evidence_id: Permian–Triassic extinction event:13
evidences.article: Permian–Triassic extinction event
evidences.evidence: Further evidence for environmental change around the P–Tr boundary suggests an 8 °C (14 °F) rise in temperature, and an increase in CO 2 levels by 2000 ppm (for comparison, the concentration immediately before the industrial revolution was 280 ppm, and the amount today is about 410 ppm).
evidences.votes: SUPPORTS REFUTES