Monday, June 16, 2014

Catastropic Anthropogenic Global Warming Scam

Does high levels of CO2 in the past contradict the warming effect of CO2?
"The killer proof that CO2 does not drive climate is to be found during the Ordovician- Silurian and the Jurassic-Cretaceous periods when CO2 levels were greater than 4000 ppmv (parts per million by volume) and about 2000 ppmv respectively. If the IPCC theory is correct there should have been runaway greenhouse induced global warming during these periods but instead there was glaciation."
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"Over the Earth's history, there are times where atmospheric CO2 is higher than current levels. Intriguingly, the planet experienced widespread regions of glaciation during some of those periods.

Does this contradict the warming effect of CO2? No, for one simple reason. CO2 is not the only driver of climate. To understand past climate, we need to include other forcings that drive climate. To do this, one study pieced together 490 proxy records to reconstruct CO2 levels over the last 540 million years (Royer 2006). This period is known as the Phanerozoic eon."
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"Periods of low CO2 coincide with periods of geographically widespread ice (with one notable exception, discussed below). This leads to the concept of the CO2-ice threshold - the CO2 level required to initiate a glaciation. When the sun is less active, the CO2-ice threshold is much higher. For example, while the CO2-ice threshold for present-day Earth is estimated to be 500 ppm, the equivalent threshold during the Late Ordovician (450 million years ago) is 3000 ppm."

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1 Comments:

Blogger Dan Pangburn said...

Anyone paying attention is aware that climate has always changed. The uptrend accompanying the Industrial Revolution began at the depths of the Little Ice Age (approximately 1700) and progressed fairly steadily through the 20th century. It became known as Global Warming (GW) during the comparatively steep rise in the last quarter of the 20th century.

GW ended before 2001. Measured average global temperature trend since 2001 has been flat (average of the 5 reporting agencies) and is 0.3 K less than 'consensus' predictions. That 0.3 K is 40% of the total rise in the 20th century. Since 2001, the CO2 level has increased by 30% of the total increase 1800-2001.

Two natural drivers have been identified that explain measured average global temperatures since before 1900 with 95% correlation. CO2 change is not one of them.

Search using key words AGW unveiled to discover the drivers and a graph that also shows what they predict.

June 17, 2014 1:36 pm  

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