Carbon dating how much

Most paleoclimatologists work with more widely-accepted temperature plots which have been used for many years in standard climate research and textbooks.These individual charts contain wide variations in temperature over the past 1,000 years, in opposition to the impression given by Gore's temperature diagram.In fact, they normally show a 400-year-long warm period from about 1000 to 1400 A.D., which is known as the Medieval Optimum in Europe. Certain crops like grapes could no longer be grown, the economy declined, and the Vikings were forced out of Greenland by the encroaching snow and ice.However, when one examines the figure more carefully, the argument begins to fall apart.

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The coldest center portion of this period with the fewest number of sunspots is called the Little Ice Age.Figure 1 seems to provide compelling evidence that global warming is caused by an increase in carbon dioxide.The sudden steep rise in temperature following a long period of uniform temperature prior to the Industrial Age seems to be inextricably linked to man's activities since 1850 or so.Major weaknesses have developed in the logic that carbon dioxide causes global warming.In a second article to follow, I will describe a new theory of climate change based on the influence of the sun.

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