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N2O and CH4 variations during the last glacial epoch:
Insight into global processes

Fig. 9. Details of the beginnings of D-O events 8 to 12, 19, and 20.
Fig. 9. Details of the beginnings of D-O events 8 to 12, 19, and 20. For each individual D-O event, d18O (top traces), CH4 (middle traces), and N2O (bottom traces) are shown as in Figures 2 and 3. The corresponding number of the D-O event is marked in each window. Data for D-O events 9 to 12 are from NGRIP. They are plotted on the tentative NGRIP timescale. The records for D-O events 19 and 20 are from the GRIP core on the GRIP SS09 timescale. For D-O event 8, GRIP data (light colors) are shown together with the NGRIP CH4 and N2O records (dark colors). The used timescale for this event is the GRIP SS09 timescale. The NGRIP data of D-O event 8 were matched to the GRIP data using the CH4 records of the two cores. The shaded areas denote the time period of the CH4 increases. The d18O values are only shown for orientation. Owing to the uncertainty in the difference between the gas and the ice age scale, the precise timing of the d18O increases and the greenhouse gas concentration changes cannot be deduced from this figure. CH4 and N2O, however, can be compared without any relative time uncertainty because both components are measured on the air enclosed in the same ice.

Back to Flückiger et al. GRIP/NGRIP N2O and CH4 data

4 February 2004