Temperature increases atmospheric CO2, not vice versa.

Dr. Jeffrey A. Glassman on CO2 not being the cause of increases in the earth's temperature:

Solubility, X_1, of CO2 in water.
Handbook of Chemistry & Physics, 34th ed., 1953
Solubility of Gases in Water, p. 1532.

Notwithstanding that carbon dioxide is a greenhouse gas, atmospheric carbon dioxide has neither caused nor amplified global temperature increases. Increased carbon dioxide has been an effect of global warming, not a cause. Technically, carbon dioxide is a lagging proxy for ocean temperatures. When global temperature, and along with it, ocean temperature rises, the physics of solubility causes atmospheric CO2 to increase.

Later in his paper, Dr. Glassman notes:

. . . [T]he Vostok data [are placed] squarely on the solubility curve . . . .

”Vostok CO2 concentration appears to be imprinted by the solubility pump.”

That is, historical data from the Vostok ice core data of temperature and atmospheric carbon dioxide show atmospheric carbon dioxide concentrations vary according to temperature in the same way that the solubility of carbon dioxide varies with the temperature of the water in which it is dissolved. Warmer water means less CO2 can be dissolved in water. Vosok data show increased atmospheric CO2 when temps rise.

The two phenomena are related, but increased atmospheric CO2 is the result of ocean warming.

Climatologists dismiss the oceans as the source of CO2. One of those is Gavin A. Schmidt of the NASA Goddard Institute for Space Studies (GISS); and Department of Earth and Environmental Sciences, Columbia University. He says:

The oceans cannot be a source of carbon to the atmosphere, because we observe them to be a sink of carbon from the atmosphere.

He is wrong. He apparently believes that if CO2 is absorbed by the oceans it never comes out again.

Bottom line: increased CO2 doesn’t cause increased temperatures. CO2 comes out of the oceans because something else caused the ocean’s temperature to rise.

"The Acquittal of Carbon Dioxide." By Jeffrey A. Glassman, Rocket Scientist’s Journal, 11/16/09.