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Global Temperature Patterns


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One of the most dramatic pieces of evidence provided by Global Warming theory proponents is a chart of Global Average Temperature and Atmospheric CO2 levels plotted against time since 1880 (when presumably the earliest reliable data became available).

It's a very nice chart. Over 125 years worth of detailed accurate data seem to support the proposition that the two charted quantites are inextricably linked. The correlation coefficient seems to be high, approaching 1.0. Q.E.D.

But like so many things there is more context and it has been left out. The charts below are from Thomas Crowley, Remembrance of Things Past: Greenhouse Lessons from the Geologic Record, they are supported by the IPCC report. They were developed using various methods. They are included to show that larger forces than man's influence are at work in the current climate. They also show our current temperatures are as high as they have been in the last 800,000 years.

  • But it is cold outside : We've all heard the joke, "Global warming is coming soon...it's called Spring." Critics of the current climatological theory think this proves something. James Hansen of NASA explains :: Continue reading...
  • Determining the Earth's Temperature : With a baby you just stick a thermometer in its mouth and wait thirty seconds. But the Earth is big, doesn't have a mouth and cant say ahh. So how do you measure the average temperature? :: Continue reading...
  • Melting Sea Ice : In 2007 it became clear that the North Polar Cap was melting more in the summer than it had previously. When a Northwest passage opened briefly in August 2007 scientists took note. :: Continue reading...
  • Naturally Occurring Temperature Cycles : There are lots of naturally occurring cycles that affect the climate. There is the Milankovitch cycles, the Pacific Decadal Oscillation (PDO), the Atlantic Multidecadal Oscillation (AMO), the North Atlantic Oscillation (NAO), the El Nino Southern Oscillation (ENSO), the solar cycle, solar activity (not the same as the solar cycle), and more :: Continue reading...


  • Temperature has been changing as far back as we can observe. Cycles of cooling and heating dominate the fossil and geological records. Temperatures cycles of 100,000 years, 40,000 years, 20,000 years, 500 years and 40 years have all been observed and tied to specific physical phenomena. We are currently at over 18,000 years in the 20,000 year cycle suggesting another Ice Age is coming due. The 500 year cycle switched from cold to hot in 1850. The latest 40 year cycle started in 1975 (see ACE topic) suggesting a warming period. All this is important because it's not useful to look at temperature trends in isolation of these cycles.
    Global Average Temperature Global Warming Impacts


    Created : 8/3/2006 11:15:10 AM Updated: 7/1/2007 2:51:28 PM

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