Conference proceeding
Past, Current and Future Trajectories of Watershed Nutrient Sources, Forms and Exports: a Global NEWS Application to the Millennium Ecosystem Assessment Scenarios
AGU Fall Meeting Abstracts, Vol.2007
AGU Fall Meeting
2007
Handle:
https://hdl.handle.net/2376/123869
Abstract
Dramatic global increases in anthropogenic nutrient production on land and negative impacts on coastal systems due to export from rivers are extensively documented. Recently, the comprehensive Millennium Ecosystem Assessment (MA) concluded that excessive nutrient loading of ecosystems is one of the major drivers of global ecosystem change. Increased nutrient mobilization is expected to continue for decades in response to economic and population growth. Development of a scientific basis for actions to reverse these trends and sustain riverine and coastal ecosystem health requires quantitative models applicable at regional to global scales, sensitive to changes in watershed anthropogenic forcings, and capable of predicting changes in element ratios and nutrient forms (dissolved vs. particulate, organic vs. inorganic) which have been shown to modulate the impacts of nutrient loading on marine ecosystems. The Global Nutrient Export from Watersheds (NEWS) system of models was designed to meet these requirements and was previously applied to contemporary (1995) forcings. We will present preliminary results from an application to past (1970) and current (2000) conditions, and compare them to four MA future scenarios thru 2050. These scenarios integrate economic, social, and ecosystem processes, and represent plausible futures with contrasting degrees of global cooperation and of sustainability of ecosystem services.
Metrics
9 Record Views
Details
- Title
- Past, Current and Future Trajectories of Watershed Nutrient Sources, Forms and Exports: a Global NEWS Application to the Millennium Ecosystem Assessment Scenarios
- Creators
- S SeitzingerE MayorgaA BeusenA BouwmanE DumontB FeketeJ HarrisonC KroezeR LeeC J VorosmartyD. Wisser
- Publication Details
- AGU Fall Meeting Abstracts, Vol.2007
- Conference
- AGU Fall Meeting
- Academic Unit
- School of the Environment (CAS)
- Identifiers
- 99900669311801842
- Resource Type
- Conference proceeding