HR: 17:15h
AN: A34B-06    [Abstracts]
TI: Effect of NO_x emission controls from world regions on the long-range transport of ozone air pollution and human mortality
AU: * West, J
EM: jjwest@email.unc.edu
AF: University of North Carolina, Dept. of Environmental Sciences & Engineering CB #7431, Chapel Hill, NC 27599, United States
AU: Naik, V
EM: vnaik@princeton.edu
AF: Princeton University, Woodrow Wilson School of Public & International Affairs, and Program in Atmospheric & Oceanic Sciences, 403 Robertson Hall, Princeton, NJ 08544, United States
AU: Horowitz, L W
EM: larry.horowitz@noaa.gov
AF: NOAA Geophysical Fluid Dynamics Laboratory, 201 Forrestal Road, Princeton, NJ 08540, United States
AB: We model the influences of 10% reductions in anthropogenic nitrogen oxide (NO_x) emissions from each of nine world regions on surface ozone air quality in that region and all other regions, using the MOZART-2 model of tropospheric chemistry and transport. In doing so, we quantify the relative importance of long-range transport between different world regions for ozone. We find that the strongest inter-regional influences are for Europe to the Former Soviet Union (FSU), East Asia to Southeast Asia, and Europe to Africa. The largest influences per unit of NO_x reduced, however, are seen for tropical source regions, due to greater sensitivity of ozone production to NO_x emissions. Results show, for example, that NO_x reductions in North America are about 20% as effective per ton at reducing ozone in Europe, as NO_x reductions from Europe itself. In estimating the changes in cases of premature mortality associated with ozone, we find that NO_x reductions in North America, Europe, and FSU reduce more mortalities outside of the source regions than within. Among world regions, an average ton of NO_x reduced in India causes the greatest number of avoided mortalities (mainly in India itself). We also assess the long-term increases in global ozone resulting from methane increases due to the regional NO_x reductions. For many of the more distant source-receptor pairs, the long-term increase in ozone roughly negates the direct short-term ozone decrease. The increase in methane and long-term ozone per unit of NO_x reduced is greatest in tropical source regions and varies among different regions by a factor of ten.
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
DE: 3304 Atmospheric electricity
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting