The National Academy of Sciences has released a new study showing that global warming is occurring at a rate which is three times faster than was predicted in the most drastic models. Added to the newly discovered fact that the White House has secretly dismantled the multi-billion dollar program designed to monitor global warming via satellites, (diaried on Daily Kos by jhritz), the revelation will certainly up the ante in the discussion of global warming.
The Independent reports the following:
The study, published by the US National Academy of Sciences, shows that carbon dioxide emissions have been increasing by about 3 per cent a year during this decade, compared with 1.1 per cent a year in the 1990s.
The significance is that this is much faster than even the highest scenario outlined in this year's massive reports by the Intergovernmental Panel on Climate Change (IPCC) - and suggests that their dire forecasts of devastating harvests, dwindling water supplies, melting ice and loss of species are likely to be understating the threat facing the world.
The study found that nearly three-quarters of the growth in emissions came from developing countries, with a particularly rapid rise in China. The country, however, will resist being blamed for the problem, pointing out that its people on average still contribute only about a sixth of the carbon dioxide emitted by each American. And, the study shows, developed countries, with less than a sixth of the world's people, still contribute more than two-thirds of total emissions of the greenhouse gas.
The report, titled Global and regional drivers of accelerating CO2 emissions (pdf), is summarized as follows:
CO2 emissions from fossil-fuel burning and industrial processes have been accelerating at a global scale, with their growth rate increasing from 1.1% y-1 for 1990-1999 to >3% y-1 for 2000-2004. The emissions growth rate since 2000 was greater than for the most fossil-fuel intensive of the Intergovernmental Panel on Climate Change emissions scenarios developed in the late 1990s. Global emissions growth since 2000 was driven by a cessation or reversal of earlier declining trends in the energy intensity of gross domestic product (GDP) (energy/GDP) and the carbon intensity of energy (emissions/energy), coupled with continuing increases in population and per-capita GDP. Nearly constant or slightly increasing trends in the carbon intensity of energy have been recently observed in both developed and developing regions. No region is decarbonizing its energy supply. The growth rate in emissions is strongest in rapidly developing economies, particularly China. Together, the developing and least-developed economies (forming 80% of the world’s population) accounted for 73% of global emissions growth in 2004 but only 41% of global emissions and only 23% of global cumulative emissions since the mid-18th century. The results have implications for global equity.
This is of course in line with the information released by the National Snow and Ice Data Center’s recent revelations that the loss of Arctic ice have greatly exceeded model estimates.
When the authors analyzed the IPCC computer model runs, they found that, on average, the models simulated a loss in September ice cover of 2.5 percent per decade from 1953 to 2006. The fastest rate of September retreat in any individual model simulation was 5.4 percent per decade. September marks the yearly minimum of sea ice in the Arctic. But newly available data sets, blending early aircraft and ship reports with more recent satellite measurements, show that the September ice actually declined at a rate of about 7.8 percent per decade during the 1953 to 2006 period.
"Because of this disparity, the shrinking of summertime ice is about thirty years ahead of the climate model projections," said NSIDC scientist and co-author Ted Scambos. This suggests that the Arctic could be seasonally free of sea ice earlier than the IPCC projected range of 2050 to well beyond 2100.
The authors speculate that the computer models may fail to capture the full impact of increased carbon dioxide and other greenhouse gases in the atmosphere. Whereas the models indicate that about half of the ice loss from 1979 to 2006 was caused by increased greenhouse gases, and the other was half caused by natural variations in the climate system, the GRL study indicates that greenhouse gases may be playing a significantly higher role.
These authoritative studies show the IPCC reports to be actually conservative in their projections. Based on recent history, this will be another piece in the massive body of evidence to which the response of global warming denialists and full-fledged Goreophobes will further prove their increasing irrelevance. For the earth's sake, their journey to obscurity can't happen quickly enough.
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Cross-posted (minus recent updates) at Ecotality Blog.