All James Hansen's 1988 scenarios overestimated actual temperature change substantially even with anthropogenic greenhouse gas (AGHG) emission assumptions that underestimated actual emissions. With no AGHG reductions at all, observed temperature change is now well below Hansen's 1988 calculations for a world with “drastically reduced” emissions. Therefore any economic hardships incurred to implement Hansen's emissions reduction scenarios B or C would have been money wasted for no benefit.
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References
1.
HansenJames E., “The Greenhouse Effect: Impacts on Current Global Temperature and Regional Heat Waves” presented to the US Senate Committee on Energy and Natural Resources, June 23rd, 1988
2.
HansenJ., “Global Climate Changes as Forecast by Goddard Institute for Space Studies Three-Dimensional Model”J. Geophysical Research, Vol. 93, No.D8, pp 9341–9364, Aug. 20, 1988
3.
BernsteinL., “Intergovernmental Panel on Climate Change-Fourth Assessment Report. Summary for Policymakers. P. 4, Figure SPM.3
4.
KoutsoyiannisD., “On the Credibility of Climate Predictions”Journal des Sciences Hydrologiques, 53(4), pp 671–686
5.
ChylekP., and LohmannU., “Aerosol Radiative Forcing and Climate Sensitivity Deduced from the Last Glacial Maximum to Holocene Transition”Geophysical Research Letters, Vol 35, L04804, doi:10.1029/2007GL032759, 2008
6.
SchwartzS.E., “Heat Capacity, Time Constant and Sensitivity of Earth's Climate System”, J. Geophysical Research, June 2007
7.
Houghton, Global Warming: The Complete Briefing3rd Ed., p.31, Cambridge U. Press
8.
SpencerR.W., “Cloud and Radiation Budget Changes Associated with Tropical Intraseasonal Oscillations”Geophysical Research Letters, 34: L15707 doi:10.1029/2007GL029698
9.
PielkeR.A.Sr., “Land Use and Climate Change”Science, Vol. 310, 9 Dec. 2005 p. 1625–6
10.
RenG.Y., “Implications of Temporall Change in Urban Heat Island Intensity Observed at Beijing and Wuhan Stations”Geophysical Research Letters, Vol. 34, L05711, doi:1-.1029/2006GL027927, 2007
11.
ScarfettaN., and WestB.J., J. Geophys. Res., 112, D24S03 (2007)
12.
CompoG.P., and SardeshmukhP.D., “Oceanic Influences on Recent Continental Warming”Climate Dynamics, in press Aug. 2008
