A detailed atmospheric methane record from the EPICA Dome C ice core that extends the history of atmospheric methane to 800,000 years before present is detailed. Spectral analyses indicate that the long-term variability in atmospheric methane levels is dominated by ∼100,000 year glacial–interglacial cycles up to ∼400,000 years ago with an increasing contribution of the precessional component during the four more recent climatic cycles.
- Laetitia Loulergue
- Adrian Schilt
- Jérôme Chappellaz
