Carbon dioxide in the atmosphere was nearly constant at about 280 ppm 10,000 years ago. Since 1750 atmospheric CO2 has increased by 38%, primarily from combustion of fossil fuels, deforestation, and change in land use.
Some scientists suspect that the contribution of CO2 and methane from the melting permafrost is contributing to no change in the rate of increasing CO2 in our atmosphere in spite of less fuel use by Americans during the severe recession in 2008-2009.
The facts are conclusive, but will the world act in time. Now it looks like we will suffer the irreversible climate change well into the twenty-second and well into the twenty-third centuries.
Storable foods are still relatively cheap, but problems with crop yield decrease sharply due to excess storms or droughts in the Midwest, Florida, and California and worldwide such has occurred in Russia, Europe, and Asia, Food and Water will likely run out before oil. Increasing use of Coal and fracking gas will destroy our water, air, and land.
I don’t see convincing reasons for being optimistic for longterm comfortable survival of the human race. When needed commodities are scarce, we will likely have centuries of wars and smaller conflicts between neighbors and wholesale emigration to lands where they can survive.
Of course if you believe that you will sent to paradise when you die, why worry?
Jim Kawakami, Nov 24, 2010, http://jimboguy.blogspot.com
GENEVA — A report by the U.N. weather agency has found that greenhouse gas levels in the atmosphere reached record levels in 2009.
The World Meteorological Organization says efforts to reduce emissions of carbon dioxide, methane and nitrous oxide haven't diminished the atmospheric concentration of these gases widely blamed for stoking global warming.
The Geneva-based agency says concentrations of carbon dioxide rose in 2009 by 1.6 parts per million, to 386.8 parts per million. The preindustrial carbon dioxide average was about 280 parts per million. The higher the concentration of greenhouse gases, the more heat is trapped in the atmosphere.
WMO said Wednesday that the recent economic slowdown hadn't significantly affected emissions of greenhouse gases. http://www.huffingtonpost.com/2010/11/24/greenhouse-gas-concentrat_n_787959.html?utm_source=DailyBrief&utm_campaign=112410&utm_medium=email&utm_content=NewsEntry&utm_term=Daily+Brief
World Meteorological Organization http://www.wmo.int/pages/prog/arep/gaw/ghg/documents/ghg-bulletin2008_en.pdf … For about 10,000 years before the industrial revolution, the atmospheric abundance of CO2 was nearly constant at ~280ppm (ppm=number of molecules of the gas per million molecules of dry air). This abundance represented a balance between the atmosphere, the oceans and the biosphere. Since 1750, atmospheric CO2 has increased by 38%, primarily because of emissions from combustion of fossil fuels (8.62Gt carbon in 2007) and deforestation and land use change (0.5-2.5Gt carbon per year over
- This percentage is calculated as the relative contribution of the mentioned gas to the increase in global radiative forcing caused by all long- lived greenhouse gases since 1750 (http://www.esrl.noaa.gov/gmd/aggi). …
Globally averaged
CH which means an increase of 7 ppb from the year before. It exceeds the highest annual mean abundance recorded so far, which was in 2007 (Figure 4). Methane was
increasing by up to 13 ppb per year during the late 1980s, while the growth rate decreased during the past decade. The 7ppb rise from 2007 to 2008 follows the 7 ppb rise the previous year and they represent the highest annual increases since 1998. From the existing data it is not clear if this 14ppb increase over two years
represents the beginning of a new upward trend in CH . In
1600 1985
4
4 order to improve our
understanding of the processes
that affect CH4 emissions more in situ measurements would be needed close to the
source regions. …
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