Constraining N2O emissions since 1940 using firn air isotope measurements in both hemispheres

Markella Prokopiou, Patricia Martinerie, Celia J. Sapart, Emmanuel Witrant, Guillaume Monteil, Kentaro Ishijima, Sophie Bernard, Jan Kaiser, Ingeborg Levin, Thomas Blunier, David Etheridge, Ed Dlugokencky, Roderik S. W. van de Wal, Thomas Rockmann