Figures & data
Figure 1. Comparison of initial fluxes and the RTM retrieved fluxes for CH4 (upper panel) and N2O (lower panel). The 1:1 line is given in gray. Open gray symbols denote flux estimates that were rejected due to a strongly varying flux during night-time.
Figure 2. Night-time (22:00 h–06:00 h) RTM flux estimates of CH4 (upper panel) and N2O (lower panel) derived using the in-situ observations in Egbert, Ontario.
Figure 3. Observed mean annual night-time (22:00 h–06:00 h) fluxes for CH4 (upper panel) and N2O (lower panel) in black. The inventory-based flux estimates are given in dark gray. The data coverage for N2O is too low for 2007 and is thus neglected. For CH4 the light gray bars give the inventory-based flux estimates after adjusting the EDGARV4.1 inventory according to EC statistics. For N2O the light gray bars include the seasonal cycle of agricultural N2O emissions from IER (2009).
Figure 4. Contribution to the mean flux (logarithmic scale from 100 (red) to 10−6 (blue)) for the nights when (A) the inventory-based flux predictions for CH4 are within the range of the observational fluxes, (B) the inventory-based flux predictions for CH4 are above the observed range, (C) the observational flux estimates for N2O are within the range of the inventory predictions, (D) the observational data is above the range of N2O fluxes predicted by the inventory. These maps were created with Google Earth ( http://earth.google.com).
