HR: 10:20h
AN: B12A-01 INVITED     [Abstracts]
TI: Anthropogenic Nitrogen Mobilization: Drivers, Consequences and Opportunities for Action
AU: * Galloway, J N
EM: jng@virginia.edu
AF: Environmental Sciences University of Virginia, PO Box 400123, Charlottesville, VA 22904-4123 United States
AB: Food and energy production converts N$_{2}$ to reactive N to such a degree that in many regions of the world, human action dominates the introduction and cycling of reactive nitrogen. While there are major benefits (food!), there are also numerous negative impacts on humans and ecosystems. This presentation will briefly examine the magnitude of alteration of the N cycle, and then focus on the resulting negative impacts, how they are connected, and how they might be reduced. The challenge is how to enhance the beneficial aspects of N use, while developing policies that take into account the cascading nature of nitrogen downstream and downwind from its point of entry into environmental systems.
DE: 4805 Biogeochemical cycles (1615)
DE: 0322 Constituent sources and sinks
DE: 0330 Geochemical cycles
DE: 0365 Troposphere--composition and chemistry
DE: 0400 Biogeosciences
SC: Biogeosciences [B]
MN: 2004 AGU Fall Meeting