Ice Core Results Debunk IPCC Global Warming Concerns

The previous post detailed how the IPCC had spent thirty years glossing over the fact global temperatures rose from 1910 to 1950 at the same rate as they did from 1970 to 2012 despite the fact fossil emission growth was a tiny fraction of the later increase.  Also global temperatures went down between 1950 and 1970 despite the fact that fossil emissions more than doubled during that period.

Both debunk the claim that an increase in fossil emission has 10 times the effect on global temperatures as increased energy from the Sun.  The only rational explanation is that global temperatures driven by the Sun increase CO2 out-gassing from ocean.  At least for the last 100 years, increasing global temperatures are the reason for the increases in atmospheric CO2 not the result.

This post details ice core data also support the conclusion global temperatures are the reason for increasing CO2 level in the atmosphere.  The entrapped air inclusions in the ice cores enable comparisons of global temperatures and CO2 over many millennia.   A 1998 collaborative ice-drilling project between Russia, the United States, and France at the Russian Vostok station in East Antarctica yielded the deepest ice core ever recovered, reaching a depth of 3,623 m. 

The Eemian glacial period between 136,000 and 110,000 years before present was one of 5 interglacial periods in the last 450,000 years. It showed temperatures increasing some 12 deg C over 7000 years with CO2 rising some 200 years behind from 200 parts per million (ppm) to 290 ppm. 

A Skeptical Science web site apparently concurs with IPCC with posts purporting to  “Getting skeptical about global warming skepticism”.  It responded to the delay with a recent post “CO2 lags temperature – what does it mean?”  under the heading “Climate Myth”:

In the case of warming, the lag between temperature and CO2 is explained as follows: as ocean temperatures rise, oceans release CO2 into the atmosphere. In turn, this release amplifies the warming trend, leading to yet more CO2 being released. In other words, increasing CO2 levels become both the cause and effect of further warming. 

This “feedback” assessment may or may not be a rational explanation for CO2 lag during the warming.  How does  “feedback” explain the subsequent drop in CO2 from 290 ppm to 230 ppm over the next 25,000 years.  The only rational reason for the drop is reducing temperature increases CO2 dispersion into the ocean.  This rationale is supported by CO2 lagging temperature 10 deg C cooling.

Again the only rational reason for cooling for all five interglacial periods has to be that lower global temperatures increase dispersion into ocean.  Thus it’s “likely” to the increase in CO2 in atmosphere is due to increased out gassing from ocean with higher temperatures.

The IPCC should take note.