Diffusive equilibration of N2, O2 and CO2 mixing ratios in a 1.5-million-years-old ice core
Bereiter B, Fischer H, Schwander J & Stocker TF, Eds: Barbante C, Kawamura K, LeGrande AN, Winckler G, Chappellaz J, Wolff E, Albert M, Greve R, Isaksson E & van den Broeke M