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TEMPERATURE VARIATIONS FROM 1979 TO 2007
Published on ©12 April 2007Updated on 20 January 2008
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The data included in this graph were taken from the monthly reports of temperature from the National Space Science and Technology Center (NSSTC) and are represented by the blue line. The red line represents the annual median. The green line constitutes the atmospheric levels of Carbon Dioxide (CO2) since 1979. The data of the density of atmospheric CO2 were also collected from the annual reports of NOAA-Mauna Loa.
Things to see in the graph:
1. The maximum variation in the atmospheric temperature was reached in 1998 (average 0.52 °C) and it has not been repeated since then.
2. The trend starting in 1999 supports a cooling, not a warming, of the atmosphere.
3. The increase in the density of CO2 is not correlated with the variations of the atmospheric temperature.
4. 2006 was a colder year than 2005.
5. The global trend from 1979 to date is of 0.144 °C; therefore, there is not any trend to an unusual global warming, but that it has remained within the natural parameters of the Holocene period (from -3 to 3 K).
6. The press release from NOAA in the sense that 2006 had been the warmest year of the decade does not coincide with the instrumental binnacle of NSSTC; we don't know the origin of the press release, or the cause of no calibrated NOAA's records.
7. The decadal global trend, from 1997 to 2007 -including 1998, has been 0.144 °C, which does not represent a global warming in the real sense of the concept (a magnitude > 6 K would be significant; 0.144 is into the natural oscillations).