On pre-industrial variations of atmospheric CO2 and CH4 [Sur les variations préindustrielles du CO2 et du CH4 atmosphériques]

Marchal, O.Chappellaz, J.2022-11-232022-11-232022-11-232004-06-0110.1016/j.crte.2004.02.004https://infoscience.epfl.ch/handle/20.500.14299/192673We summarize (1) knowledge about the global pre-industrial cycle of CO2 and CH4, and (2) recent reconstructions of the concentration of CO2 and CH4 in the atmosphere (CO2atm and CH4atm) based on ice cores drilled in Antarctica and Greenland. We discuss critically some difficulties in the interpretation of these reconstructions and suggest studies that should permit to better understand the factors controlling CO2atm and CH4atm variations. © 2004 Académie des sciences. Publié par Elsevier SAS. Tous droits réservés.anthropogenic effectcarbon dioxidemethanepaleoatmosphereOn pre-industrial variations of atmospheric CO2 and CH4 [Sur les variations préindustrielles du CO2 et du CH4 atmosphériques]text::journal::journal article::research article