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What's the highest atmospheric CO2 levels you've found in the last 10,000 years, ie during the course of human civilization?
Hint: the date is on your desk calendar and you probably don't even have to flip a page.
Fisrst off, the ice age we are presently exiting has been going on for a hell of a lot longer than 10000 years.
Second...read em and weep...chemical analysis.... more accurate than the IR analysis being used by modern climate science.
Let me get this straight. You're now contending that CO2 levels are not rising; that the Keeling curve from the Mauna Loa Observatory is grossly inaccurate? Wow.
Keeling Curve - Wikipedia, the free encyclopedia
The Keeling Curve is a graph which plots the ongoing change in concentration of carbon dioxide in Earth's atmosphere since 1958. It is based on continuous measurements taken at the Mauna Loa Observatory in Hawaii that began under the supervision of Charles David Keeling. Keeling's measurements showed the first significant evidence of rapidly increasing carbon dioxide levels in the atmosphere. Many scientists credit Keeling's graph with first bringing the world's attention to the current increase of carbon dioxide in the atmosphere.[1]
Charles David Keeling, of the Scripps Institution of Oceanography at UC San Diego, was the first person to make frequent regular measurements of the atmospheric carbon dioxide (CO2) concentration, taking readings at the South Pole and in Hawaii from 1958 onwards.[2]
Prior to Keeling, the concentration of carbon dioxide in the atmosphere was thought to be affected by constant variability. Keeling had perfected the measurement techniques and observed "strong diurnal behavior with steady values of about 310 ppm in the afternoon" at three locations: (Big Sur near Monterey, the rain forests of Olympic Peninsula and high mountain forests in Arizona).[3] By measuring the ratio of two isotopes of carbon, Keeling attributed the diurnal change to respiration from local plants and soils, with afternoon values representative of the "free atmosphere". By 1960, Keeling and his group had determined that the measurement records from California, Antarctica, and Hawaii were long enough to see not just the diurnal and seasonal variations, but also a year-on-year increase that roughly matched the amount of fossil fuels burned per year. In the article that made him famous, Keeling observed, "at the South Pole the observed rate of increase is nearly that to be expected from the combustion of fossil fuel".[4]
How about some links to your graphs? You failed to provide any with your initial post.
References:
1) Briggs, Helen (December 1, 2007). "50 years on: The Keeling Curve legacy". BBC News.
2) Rose Kahele (October/November 2007). "Behind the Inconvenient Truth". Hana Hou! vol. 10, No. 5.
3) The Early Keeling Curve. Scripps CO2 Program
4) C. D. Keeling, The Concentration and Isotopic Abundances of Carbon Dioxide in the Atmosphere, Tellus, 12, 200-203, 1960
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