Fig. 7
From: Prominence of the tropics in the recent rise of global nitrogen pollution
Land N fluxes in the Amazon and Parana Basins. a, b Land Nr inputs include atmospheric deposition (light orange), synthetic fertilizers (sky-blue), biological N fixation (BNF) in non-agricultural (plum) and agricultural (purple) lands. c, d Land N outputs include river dissolved organic N (DON) exports (green), river dissolved inorganic N (DIN) exports (blue), soil and freshwater denitrification (light green), fire emissions (orange), net harvest in agricultural (red) and non-agricultural (brown) lands. e, f N fluxes to land storage. Solid thick lines show the baseline simulation. Dash-dot thin lines show the no-CO2 fertilization simulation. All plots show 30-year moving averages from 1750 to 2005
