Planetary temperature controls CO2 levels not humans Excerpt:
Judging by the speech Murry Salby gave at the Sydney Institute, theres a blockbuster paper coming soon. Listen to the speech: Global Emission of Carbon Dioxide: The Contribution from Natural Sources<http://www.thesydneyinstitute.com.au/podcast/global-emission-of-carbon-dioxide-the-contribution-from-natural-sources/> Professor Murry Salby is Chair of Climate Science at Macquarie University. Hes been a visiting professorships at Paris, Stockholm, Jerusalem, and Kyoto, and hes spent time at the Bureau of Meterology in Australia. Over the last two years he has been looking at C12 and C13 ratios and CO2 levels around the world, and has come to the conclusion that man-made emissions have only a small effect on global CO2 levels. Its not just that man-made emissions dont control the climate, they dont even control global CO2 levels. The higher levels of CO2 in recent decades appear to be mostly due to natural sources. He presented this research at the IUGG conference in Melbourne recently, causing great discussion and shocking a few people. Word reached the Sydney Institute, which rushed to arrange for him to speak, given the importance of this work in the current Australian political climate. The ratio of C13 to C12 (two isotopes of carbon) in our atmosphere has been declining, which is usually viewed as a signature of man-made CO2 emissions. C12 makes up 99% of carbon in the atmosphere (nearly all atmospheric carbon is in the form of CO2). C13 is much rarer about 1%. Plants dont like the rarer C13 type as much; photosynthesis prefers C12 to C13 when absorbing CO2 from the air. Prof Salby points out that while fossil fuels are richer in C12 than the atmosphere, so too is plant life on Earth, and there isnt a lot of difference in the ratios of C13 to C12 in plants versus fossil fuels. So if the C13 to C12 ratio is falling (as more C12 rich carbon is put into the air by burning fossil fuels) then we cant know if its due to man-made CO2 or natural CO2 from plants. Essentially we can measure man-made emissions reasonably well, but we cant measure the natural emissions and sequestrations of CO2 at all precisely the error bars are huge. Humans emits 5Gt or so per annum, but the oceans emit about 90Gt and the land-plants about 60Gt, for a total of maybe 150Gt. Many scientists have assumed that the net flows of carbon to and from natural sinks and sources of CO2 cancel each other out, but there is no real data to confirm this and its just a convenient assumption. The problem is that even small fractional changes in natural emissions or sequestrations swamp the human emissions. Read more here: http://joannenova.com.au/2011/08/blockbuster-planetary-temperature-controls-co2-levels-not-humans/ Presented for your reading enjoyment/information and not as a definitive piece of evidence debunking man made global warming. J - When we get piled upon one another in large cities, as in Europe, we shall become as corrupt as Europe. - Thomas Jefferson Politicians are people who, when they see light at the end of the tunnel, go out and buy some more tunnel. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-community/message.cfm/messageid:341242 Subscription: http://www.houseoffusion.com/groups/cf-community/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-community/unsubscribe.cfm
