Figure 7. Regional CH4 budget in Tg CH4 yr-1 per category (same as for the global emissions in Fig. 6) and map of the 14 continental regions considered in this study. The CH4 emissions are given for the five categories from left to right (wetlands, biomass burning, fossil fuels, agriculture and waste, and other natural). Top-down estimates are given by the left dark-coloured boxes and bottom-up estimates by the right light-coloured boxes. |