Global NEWS is an international, interdisciplinary scientific taskforce, focused on understanding the relationship between human activity and coastal nutrient enrichment. It was formed in the spring of 2002 as a workgroup of UNESCO’s Intergovernmental Oceanographic Commission (IOC), with co-sponsorship by UNEP, US-NSF, and US-NOAA. Global NEWS is a LOICZ affiliated project.
The primary aim of Global NEWS is to construct and apply the next generation of spatially explicit, global nutrient export models, linking the resulting river loads to quantitative assessments of coastal ecosystem health. The first set of global river export models was published in late 2005 in a special collection of the journal Global Biogeochemical Cycles. Please refer to these articles for more details about the models and associated results.
DIN Export from Watersheds to Coastal Systems
Figure 1. Nitrogen (inorganic N) export from watersheds to coastal systems. units: kg N km-2 watershed y-1. From S.P. Seitzinger and C. Kroeze 1998. Global distribution of nitrous oxide production and N inputs in freshwater and coastal marine ecosystems. Global Biogeochemical Cycles 12(1): 93-113. [pdf]
DIN Export by World Regions: 1990 and 2050, Business As Usual Scenario
Figure 2. Predicted increases in N export to coastal systems by the year 2050. Model predictions from C. Kroeze and S. P. Seitzinger. 1998. Nitrogen inputs to rivers, estuaries and continental shelves and related nitrous oxide emissions in 1990 and 2050: A global model. Nutrient Cycling in Agroecosystems 52: 195-212.
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