Unspinning the IPCC alarmism

via Herald Sun

Dr. Don J. Easterbrook, Professor of Geology, Western Washington University:

From the IPCC 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…

Their misrepresentation of data is ridiculous…

[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 … and satellite temperature data shows the August 13 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)…

From the 2013 IPCC Report

This is a gross misrepresentation of data. The Antarctic ice sheet has not been losing mass—the East Antarctic ice sheet, which contains about 90% of the world’s fresh water, is not melting–it’s growing! The same is true for Antarctic shelf ice. The only part of Antarctica that may be losing ice is the West Antarctic Peninsula, which contains less than 10% of Antarctic ice. Temperature records at the South Pole show no warming since records began in 1957.

Some melting has occurred in Greenland during the 1978-1998 warming, but that is not at all unusual. Temperatures in Greenland were warmer in the 1930s than during the recent warming…

Arctic sea ice declined during the 1978-1998 warm period, but has waxed and waned in this way with every period of warming and cooling so that is not in any way unusual. Arctic sea ice expanded by 60% in 2013…. The total extent of global sea ice has not diminished in recent decades.

The statement that Northern Hemisphere snow cover has “continued to decrease in extent extent” is false… Snow extent in the Northern Hemisphere shows no decline since 1967 and five of the six snowiest winters have occurred since 2003 (Fig. 7).

Figure 7. Snow extent in the Northern Hemisphere since 1967.

Unspinning the IPCC alarmism.

Must See Also :

• Debunking The Dogma | CACA