General Discussion
In reply to the discussion: Farenheit 104 (40 degrees C). This is a number everyone should know. [View all]leveymg
(36,418 posts)CO2 has spiked to over 400 ppm in the last decade (and that is not shown on the graph above, which is based in data that is a decade old)(http://www.csmonitor.com/Science/2012/0531/Climate-change-Arctic-passes-400-parts-per-million-milestone), but historically CO2 peaks lag temperature increases by about 800 years, so it is believed not to the cause of temperature swells. Overall, the temperature wave pattern of peaks about every 80,000 years has remained amazingly constant. The article suggests we're due for a cool-off, if the pattern of the last 400,000 years still holds.
See, http://www.geocraft.com/WVFossils/last_400k_yrs.html
Temperature Graph Sources:
2001-1958: South Pole Air Flask Data
1958-1220 B.P.: Law Dome, Antarctica
1220 B.P.- 2302 B.P.: Taylor Dome, Antarctica
2302 B.P.- 414k B.P.: Vostok Ice Core Data 2000-1979: Satellite stratospheric data
1979-1871: S. Hemisphere ground temp. data
1871- 422k B.P.: Vostok Ice Core Data