I1 through I3 DESCRIPTION:

Gridded fields of nitrogen (N) loads and flux. Mobilizable N (N loads) represent the amount of N on the land surface that is available to be transported to aquatic systems. N fluxes represent the subsequent riverine nitrogen fluxes at the basin scale (Vörösmarty et al., 2000a,b; Fekete et al., 2001), for the contemporary setting (mid-1990’s) in Green et al. (2004).

DOWNLOADABLE FILES:

(I1) Contemporary_N_loads.asc = Mobilizable N loads (kg N / km2 / yr). Primary source: Green et al. (2004)

(I2) Contemporary_Total_N_flux.asc = Basin-scale Total N fluxes (kg N / km2 / yr). Primary source: Green et al. (2004)

(I3) Contemporary_DIN_flux.asc = Dissolved inorganic N fluxes (kg N / km2 / yr). Primary source: Green et al. (2004)

REFERENCES:

Green, P. A., C. J. Vorosmarty, M. Meybeck, J. N. Galloway, B. J. Peterson and E. W. Boyer. 2004. Pre-industrial and contemporary fluxes of nitrogen through rivers: a global assessment based on typology, Biogeochemistry, 68: 71-105.

Fekete, B. M., C. J. Vorosmarty, and W. Grabs. 2002. High-resolution fields of global runoff combining river discharge and simulated water balances, Global Biogeochemical Cycles, 16 (3): 15-1 to 15-10.

Vörösmarty, C.J., B. M. Fekete, M. Meybeck, and R. Lammers. 2000a. Geomorphometric attributes of the global system of rivers at 30-minute spatial resolution (STN-30). Journal of Hydrology 237: 17-39.

Vörösmarty, C.J., B.M. Fekete, M. Meybeck, and R. Lammers. 2000b. A simulated topological network representing the global system of rivers at 30-minute spatial resolution (STN-30). Global Biogeochemical Cycles 14: 599-621.

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