claim: Fourth Assessment Report (AR4), in which the likely range is given as 2.0°C to 4.5°C, with a best estimate of 3.0°C" (Pat Michaels)
evidences.evidence_id: Climate sensitivity:72
evidences.article: Climate sensitivity
evidences.evidence: IPCC authors concluded ECS is very likely to be greater than 1.5 °C (2.7 °F) and likely to lie in the range 2 to 4.5 °C (4 to 8.1 °F), with a most likely value of about 3 °C (5 °F).
evidences.votes: SUPPORTS SUPPORTS
evidences.evidence_id: Global warming controversy:208
evidences.article: Global warming controversy
evidences.evidence: In its 2007 Fourth Assessment Report, IPCC said that climate sensitivity is "likely to be in the range 2 to 4.5 °C with a best estimate of about 3 °C".
evidences.votes: SUPPORTS SUPPORTS
evidences.evidence_id: IPCC Fourth Assessment Report:62
evidences.article: IPCC Fourth Assessment Report
evidences.evidence: It is likely to be in the range of 2 to 4.5 °C, with a best estimate of about 3 °C.
evidences.votes: SUPPORTS SUPPORTS
evidences.evidence_id: IPCC Fourth Assessment Report:66
evidences.article: IPCC Fourth Assessment Report
evidences.evidence: Surface air warming in the 21st century: Best estimate for a "low scenario" is 1.8 °C with a likely range of 1.1 to 2.9 °C (3.2 °F with a likely range of 2.0 to 5.2 °F) Best estimate for a "high scenario" is 4.0 °C with a likely range of 2.4 to 6.4 °C (7.2 °F with a likely range of 4.3 to 11.5 °F) A temperature rise of about 0.1 °C per decade would be expected for the next two decades, even if greenhouse gas and aerosol concentrations were kept at year 2000 levels.
evidences.votes: NOT_ENOUGH_INFO REFUTES
evidences.evidence_id: IPCC Fourth Assessment Report:76
evidences.article: IPCC Fourth Assessment Report
evidences.evidence: Scenario B1 Best estimate temperature rise of 1.8 °C with a likely range of 1.1 to 2.9 °C (3.2 °F with a likely range of 2.0 to 5.2 °F) Sea level rise likely range [18 to 38 cm] (7 to 15 inches) Scenario A1T Best estimate temperature rise of 2.4 °C with a likely range of 1.4 to 3.8 °C (4.3 °F with a likely range of 2.5 to 6.8 °F) Sea level rise likely range [20 to 45 cm] (8 to 18 inches) Scenario B2 Best estimate temperature rise of 2.4 °C with a likely range of 1.4 to 3.8 °C (4.3 °F with a likely range of 2.5 to 6.8 °F) Sea level rise likely range [20 to 43 cm] (8 to 17 inches) Scenario A1B Best estimate temperature rise of 2.8 °C with a likely range of 1.7 to 4.4 °C (5.0 °F with a likely range of 3.1 to 7.9 °F) Sea level rise likely range [21 to 48 cm] (8 to 19 inches) Scenario A2 Best estimate temperature rise of 3.4 °C with a likely range of 2.0 to 5.4 °C (6.1 °F with a likely range of 3.6 to 9.7 °F) Sea level rise likely range [23 to 51 cm] (9 to 20 inches) Scenario A1FI Best estimate temperature rise of 4.0 °C with a likely range of 2.4 to 6.4 °C (7.2 °F with a likely range of 4.3 to 11.5 °F) Sea level rise likely range [26 to 59 cm] (10 to 23 inches) "Both past and future anthropogenic carbon dioxide emissions will continue to contribute to warming and sea level rise for more than a millennium, due to the timescales required for removal of this gas from the atmosphere."
evidences.votes: NOT_ENOUGH_INFO REFUTES