FIGURE SPM-5. Projected surface temperature changes for the early and late 21st century relative to the period 1980â€“1999. The central and right panels show the Atmosphere-Ocean General Circulation multi-Model average projections for the B1 (top), A1B (middle) and A2 (bottom) SRES scenarios averaged over decades 2020â€“2029 (center) and 2090â€“2099 (right). The left panel shows corresponding uncertainties as the relative probabilities of estimated global average warming from several different AOGCM and EMICs studies for the same periods. Some studies present results only for a subset of the SRES scenarios, or for various model versions. Therefore the difference in the number of curves, shown in the left-hand panels, is
due only to differences in the availability of results.
Its here, one of the most comprehensive studies ever done on global warming. With over 2500 scientists, over 800 contributing writers, 450 lead authors from over 130 countries, taking over 6 years to produce this one amazing report. The Intergovernmental Panel on Climate Change (IPCC) has done a wonderful job of bringing so much mental power to bear on studing this problem.
In essence this is a “read it and weep” moment for anyone who accepts science but not human caused global warming, for thouse who refuse to accept science this wont do anything for you.
This is a sober and strongly worded message to the world, do something, and do it now. Its far too late to stop the harmful effects of what we have already done, but its not too late to prevent even worse things from happening. Global warming is going to hurt us, badly, but if we act soon it wont kill us. You know what they say about things that don’t kill you…
From the study summary:
Download the summary and read it for yourself here (pdf)
Global atmospheric concentrations of carbon dioxide, methane and nitrous oxide have increased markedly as a result of human activities since 1750 and now far exceed pre-industrial values determined from ice cores spanning many thousands of years. The global
increases in carbon dioxide concentration are due primarily to fossil fuel use and land-use change, while those of methane and nitrous oxide are primarily due to agriculture.
Warming of the climate system is unequivocal, as is now evident from observations of increases in global average air and ocean temperatures, widespread melting of snow and ice, and rising global mean sea level