claim: Elementary radiative-transfer calculations demonstrate that a natural surface global brightening amounting to ~1.9 Wm–2 over the 18-year period of study would be expected – using the IPCC’s own methodology – to have caused a transient warming of 1 K (1.8 F°).
evidences.evidence_id: Climate sensitivity:87
evidences.article: Climate sensitivity
evidences.evidence: The global temperature increase since the beginning of the industrial period (taken as 1750) is about 0.8 °C (1.4 °F), and the radiative forcing due to CO 2 and other long-lived greenhouse gases – mainly methane, nitrous oxide, and chlorofluorocarbons – emitted since that time is about 2.6 W/m2.
evidences.votes: REFUTES SUPPORTS
evidences.evidence_id: Climate sensitivity:92
evidences.article: Climate sensitivity
evidences.evidence: Taking planetary heat uptake rate as the rate of ocean heat uptake estimated by the IPCC AR4 as 0.2 W/m2, yields a value for S of 2.1 °C (3.8 °F).
evidences.votes: REFUTES NOT_ENOUGH_INFO
evidences.evidence_id: Climate sensitivity:97
evidences.article: Climate sensitivity
evidences.evidence: Solar irradiance is about 0.9 W/m2 brighter during solar maximum than during solar minimum, which correlated in measured average global temperature over the period 1959-2004.
evidences.votes: REFUTES SUPPORTS
evidences.evidence_id: Intergovernmental Panel on Climate Change:113
evidences.article: Intergovernmental Panel on Climate Change
evidences.evidence: They judge that global mean surface air temperature has increased by 0.3 to 0.6 °C over the last 100 years, broadly consistent with prediction of climate models, but also of the same magnitude as natural climate variability.
evidences.votes: REFUTES NOT_ENOUGH_INFO
evidences.evidence_id: Paleocene:124
evidences.article: Paleocene
evidences.evidence: The Paleocene–Eocene thermal maximum was an approximate 200,000 year long event where the global average temperature rose by some 5 to 8 °C (9 to 14 °F), and mid-latitude and polar areas may have exceeded modern tropical temperatures of 24–29 °C (75–84 °F).
evidences.votes: REFUTES NOT_ENOUGH_INFO