The Global Nutrient Export from Watersheds (Global NEWS) Model

Developed by an international, interdisciplinary scientific workgroup, the Global Nutrient Export from Watersheds (Global NEWS) model is comprised of river-basin scale sub-models that predict export (and estimate sources) of dissolved inorganic nitrogen and phosphorus (DIN, DIP), dissolved organic carbon, nitrogen and phosphorus (DOC, DON, DOP), total suspended solids (TSS), particulate organic carbon (POC), particulate nitrogen and phosphorus (PN and PP), and dissolved silica (DSi). Natural and anthropogenic nutrient sources in watersheds, hydrological and physical factors, and in-river N and P removal are used as model drivers. NEWS sub-models have been applied retrospectively and prospectively in combination with climate and land-use scenarios for the years 1970, 2000, 2030, and 2050, and at global, continental, and regional scales.

Further Information

NEWS Model Home Page:

NEWS model
Scheme showing the input data and information flows for the NEWS model used in retrospective (1970-2000) and scenario (2030 and 2050) analyses based on the Millennium Ecosystem Assessment (MEA).

Select Model Development Publications:

  • Beusen, A. H. W., A. L. M. Dekkers, A. F. Bouwman, W. Ludwig, and J. Harrison (2005), Estimation of global river transport of sediments and associated particulate C, N, and P, Global Biogeochem. Cycles 19, GB4S05, doi:10.1029/2005GB002453.
  • Dumont, E., J. A. Harrison, C. Kroeze, E. J. Bakker, and S. P. Seitzinger (2005), Global distribution and sources of dissolved inorganic nitrogen export to the coastal zone: Results from a spatially explicit, global model, Global Biogeochem. Cycles 19, GB4S02, doi:10.1029/2005GB002488.
  • Harrison, J. A., S. P. Seitzinger, A. F. Bouwman, N. F. Caraco, A. H. W. Beusen, and C. J. Vörösmarty (2005), Dissolved inorganic phosphorus export to the coastal zone: Results from a spatially explicit, global model, Global Biogeochem. Cycles 19, GB4S03, doi:10.1029/2004GB002357.
  • Harrison, J.A., N.F. Caraco, and S.P. Seitzinger (2005), Global distribution and sources of dissolved organic matter export by rivers: results from a spatially explicit, global model (NEWS-DOM), Global Biogeochemical Cycles 19 (4), GB4S04, doi:10.1029/2005GB002480, 1-16.
  • Mayorga, E., S.P. Seitzinger, J.A. Harrison, E. Dumont, A.H.W. Beusen, A.F. Bouwman, B.M. Fekete, C. Kroeze and G. Van Drecht (2010), Global Nutrient Export from WaterSheds 2 (NEWS 2): Model development and implementation. Environmental Modelling and Software 25(7):837-853, doi:10.1016/j.envsoft.2010.01.007.
  • Seitzinger, S. P., J. A. Harrison, E. Dumont, A. H. W. Beusen, and A. F. Bouwman (2005), Sources and delivery of carbon, nitrogen, and phosphorus to the coastal zone: An overview of Global Nutrient Export from Watersheds (NEWS) models and their application, Global Biogeochem. Cycles 19, GB4S01, doi:10.1029/2005GB002606.
  • Van Drecht, G., A.F. Bouwman, J. Harrison and J.M. Knoop (2009), Global nitrogen and phosphate in urban waste water for the period 1970-2050. Global Biogeochemical Cycles 23, GB0A03, doi:10.1029/2009GB003458.

Select BioEarth-Relevant Publications (Scenario and Enhanced Resolution Runs):

  • Bouwman, A.F., A.H.W. Beusen and G. Billen (2009), Human alteration of the global nitrogen and phosphorus soil balances for the period 1970–2050. Global Biogeochemical Cycles 23, GB0A04, doi:10.1029/2009GB003576.
  • Fekete, B.M., D. Wisser, C. Kroeze, E. Mayorga, L. Bouwman, W.M. Wollheim and C. Vorosmarty (2010), Millennium Ecosystem Assessment scenario drivers (1970-2050): Climate and hydrological alterations. Global Biogeochemical Cycles, doi:10.1029/2009GB003593.
  • Harrison, J. A., A. F. Bouwman, E. Mayorga, and S. Seitzinger (2010), Magnitudes and sources of dissolved inorganic phosphorus inputs to surface fresh waters and the coastal zone: A new global model, Global Biogeochemical Cycles 24, GB1003, doi:10.1029/2009GB003590.
  • Seitzinger, S.P., E. Mayorga, A.F. Bouwman, C. Kroeze, A.H.W. Beusen, G. Billen, G. Van Drecht, E. Dumont, B.M. Fekete, J. Garnier and J.A. Harrison (2010), Global river nutrient export: A scenario analysis of past and future trends. Global Biogeochemical Cycles 24, GB0A08, doi:10.1029/2009GB003587.
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