Table 2.

CO₂, CH₄ and N₂O fluxes and their overall global warming potential (Pg CO₂ eq/year) for major biome types in North America during the recent decade

Variables	Foresta	Grassland	Wetland	Cropland	Othersb	North America
CO2	−0.69	−0.12	−0.31	−0.46	−0.27	−1.85
CH4	−0.04	−0.02	0.61	0.01	−0.04	0.52
N2O	0.25	0.11	0.07	0.23	0.15	0.81
Overall GWP	−0.48	−0.02	0.37	−0.22	−0.16	−0.50

^aPart of forest is included in wetland as woody wetland. Biome-level GWP may not sum to the totals due to rounding

^bOthers include shrubland, tundra, desert, urban lawn and forest, and bare ground