Early in my research I came across the topic of CO2 lagging behind the temperature data in the ice core data. This is generally only seen in the major changes in climate. The beginning and ending of glacials (ice ages). The little scale warmings and coolings of the Earth like what is happening now do not really matter in the full scale of the Earth’s climate. They are simply weather systems of the hundred year scale.
The big changes that take place on the 10,000 year scale are very significant to the Earth’s climate. It is these big changes that cause CO2 levels to change. When a glacial (commonly called an ice age) ends the temperature of the Earth rapidly increases for thousands of years. Well after the Earth starts warming the CO2 level starts to increase.
I came across a little article that states the following:
“The reason has to do with the fact that the warmings take about 5000 years to be complete. The lag is only 800 years. All that the lag shows is that CO2 did not cause the first 800 years of warming, out of the 5000 year trend. The other 4200 years of warming could in fact have been caused by CO2, as far as we can tell from this ice core data.
The 4200 years of warming make up about 5/6 of the total warming. So CO2 could have caused the last 5/6 of the warming, but could not have caused the first 1/6 of the warming.”
“Some (currently unknown) process causes Antarctica and the surrounding ocean to warm. This process also causes CO2 to start rising, about 800 years later. Then CO2 further warms the whole planet, because of its heat-trapping properties. This leads to even further CO2 release.”
This is the type of thing that is getting counted as climate “science.” This my favorite example of misinformation. The simple statement that CO2 could be responsible for 5/6, but not 1/6 is intellectually and scientifically dishonest.
This is a really special piece here. I normally will not take great offense to things, but this one really irked me. The combination of saying that an unknown process (which is a blatant lie) starts the initial warming which is then taken over after 800 years by the CO2 feedback is absurd. There is no basis that the original cause of the warming ends.
Any person looking at a chart of the warming will see that the warming is an uninterrupted event that lasts the entire period, 5,000 years being a reasonable average for the length of the warming. Here is an overlay of the Vostok ice core temperature and the associated CO2 levels.
CO2 clearly lags the warming that took place 135,000 years ago and even more importantly, it also lagged the cooling that ended the Eemian interglacial (warm period between glacial periods) 117,000 years ago. That is right, the Earth re-entered the last Ice Age while CO2 levels remained high. If CO2 caused the warming, then why didn’t it stop the last glacial period from happening?
Fortunately the answer to that is easy. That is why I wrote my book. To explain why the Earth’s climate goes through these changes. All the information is out there, but it is scattered all over the place. Help get the word out by helping me get the book published.