claim: Hansen's 1988 results are evidence that the actual climate sensitivity is about 3°C for a doubling of atmospheric CO2.
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: REFUTES REFUTES
evidences.evidence_id: Climate sensitivity:18
evidences.article: Climate sensitivity
evidences.evidence: The equilibrium climate sensitivity (ECS) refers to the equilibrium change in global mean near-surface air temperature that would result from a sustained doubling of the atmospheric equivalent CO 2 concentration (ΔT2×).
evidences.votes: SUPPORTS SUPPORTS
evidences.evidence_id: Climate sensitivity:53
evidences.article: Climate sensitivity
evidences.evidence: In his first paper on the matter, he estimated that global temperature would rise by around 5 to 6 °C (9.0 to 10.8 °F) if the quantity of CO 2 was doubled.
evidences.votes: REFUTES REFUTES
evidences.evidence_id: Climate sensitivity:58
evidences.article: Climate sensitivity
evidences.evidence: For constant humidity they computed a climate sensitivity of 2.3 °C per doubling of CO2 (which they rounded to 2, the value most often quoted from their work, in the abstract of the paper).
evidences.votes: SUPPORTS REFUTES
evidences.evidence_id: James Hansen:99
evidences.article: James Hansen
evidences.evidence: An alternate scenario would keep the warming to below this if climate sensitivity were below 3 °C for doubled CO 2.
evidences.votes: SUPPORTS NOT_ENOUGH_INFO