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.