The science of reconstructing the past flora and past climate from pollen data obtained from lake and bog sediments.
Past climate analogs.
The partial pressure of CO 2 in the atmosphere and the ocean. In the atmosphere, the partial pressure of CO 2 is defined as the pressure the CO 2 would exert if all other gases were removed. The sum of the partial pressure of all the atmospheric gases will equal the atmospheric pressure. The partial pressure of CO 2 in the atmosphere is determined by the atmospheric CO 2 concentration and atmospheric temperature. In the ocean, the pCO 2 is determined by the amount of dissolved CO 2 and H 2 CO 3 .