There really isn’t a polite way to put it: the UN’s latest IPCC report on global warming is a pack of lies. It will take scientists a long time to dissect the report and reveal all of its flaws, but in the meantime, Dr. Don Easterbrook hits some of the most important points. For a basic understanding of how grotesquely misleading the IPCC report is, you should read the whole thing. Here are some excerpts:
From the IPPC 2013 Report:
After all these years, IPCC still doesn’t get it—we’ve been thawing out from the Little Ice Age for several hundred years but still are not yet back to pre-Little Ice Age temperatures that prevailed for 90% of the past 10,000 years. Warming and cooling has been going on for millions of years, long before CO2 could have had anything to do with it, so warming in itself certainly doesn’t prove that it was caused by CO2.
Their misrepresentation of data is ridiculous. In Fig. 1, the IPCC report purports to show warming of 0.5°C (0.9°F) since 1980, yet surface temperature measurements indicate no warming over the past 17 years (Fig. 2) and satellite temperature data shows the August 2013 temperature only 0.12°C (0.21°F) above the 1908 temperature (Spencer, 2013). IPCC shows a decadal warming of 0.6°C (1°F) since 1980 but the temperature over the past decade has actually cooled, not warmed. …
From the IPCC Report:
There just isn’t any nice way to say this—it’s is an outright lie. A vast published literature exists showing that recent warming is not only not unusual, but more intense warming has occurred many times in the past centuries and millennia. As a reviewer of the IPCC report, I called this to their attention, so they cannot have been unaware of it. For example, more than 20 periods of warming in the past five centuries can be found in the Greenland GISP2 ice core (Fig. 3) (Easterbrook, 2011), the Medieval and Roman Warm Periods were warmer than recent warming (Fig. 4), and about 90% of the past 10,000 years were warmer than present (Fig. 5).
Figure. 3. More than 20 periods of warming in the past 500 years. (Greenland GISP2 ice core, Easterbrook, 2011)
Figure 4. Temperatures of the Medieval and Roman Warm Periods were higher than recent temperatures.
Figure 5. ~90 of temperatures during the past 10,000 years were significantly warmer than recent warming.
(Cuffy and Clow, 1997; Alley, 2000).
Not only was recent warming not unusual, there have been at least three periods of warming/cooling in the past 15,000 years that have been 20 times more intense, and at least 15 have been 5 times as intense. (Easterbrook, 2011)
Figure 6. Intensity of warming and cooling in the past 15,000 years. (Easterbrook, 2011)
More at the link, including rising sea levels and shrinking polar ice. As you might expect from a United Nations product, the IPCC report has a great deal to do with politics, and very little to do with science.