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)
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)
ipcc fourth assessment report:66
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.