Galloway, J. N. Environmental Sciences, University of Virginia, jng@virginia.edu
, . N. ,

 
EARTH TO AIR TO WATER: THE CHANGING INFLUENCE OF ATMOSPHERIC DEPOSITION ON AQUATIC ECOSYSTEMS
 
Atmospheric emissions of biologically-relevant materials have increased significantly over the last century due to human demands for energy and food. These increased emissions have resulted in increased deposition of beneficial and deleterious substances to aquatic ecosystems that are often at some distance from the point of emission. This overview presentation: 1) presents the time course of deposition patterns of sulfur, nitrogen, phosphorus compounds on a global and regional basis, 2) reviews the extent of our knowledge on the total deposition of N, S and P compounds to aquatic ecosystems, paying special attention to the uncertainties involving dry deposition and organic nitrogen. 3) examines the role of episodic deposition in delivering large amounts of materials over short periods of time to aquatic ecosystems, and 4) projects how atmospheric deposition patterns on a global and regional basis will change from the present to the year 2050.
 
Day: Wednesday, Feb. 3
Time: 08:30 - 09:00am
Location: Sweeney Center
 
Code: SS50WE0830S