HR: 1340h
AN: A23A-0775    [Abstracts]
TI: Quantifying Source-Receptor Relationships between NOx Emissions and O3 Concentrations in Downwind States in the Continental U.S
AU: * Tong, D Q
EM: quansong@princeton.edu
AF: Science, Technology and Environmental Policy program, Woodrow Wilson School, Princeton University, Princeton, NJ 08544 United States
AU: Mauzerall, D L
EM: mauzeral@princeton.edu
AF: Science, Technology and Environmental Policy program, Woodrow Wilson School, Princeton University, Princeton, NJ 08544 United States
AB: The objective of this study is to examine source-receptor relationships between NOx emissions from individual U.S. states and the O3 that is produced from that NOx and transported to downwind states. US EPA Models-3/CMAQ is used to calculate ambient concentrations of chemical species by using emissions from MCNC SMOKE and meteorology from NCAR/PSU MM5 as input, and simulating chemical transformation, transport, and deposition processes that determine the fate of tropospheric O3. We first evaluate the ability of CMAQ to capture the main features of surface O3 and its variations over the continental United States by comparing model output with hourly O3 measurements obtained from AIRS and CASTNet surface measurements. Next, we present a process budget analysis of O3 to determine the relative magnitudes of local photochemistry and remote transport to each receptor state. Finally, we present the source-receptor relationship between O3 and NOx emissions from individual states in a summer month (July 1996). We conclude by quantifying both where the O3 produced by a fixed quantity of NOx emissions from each source state goes, and from which states the O3 each receptor state receives comes from.
DE: 9350 North America
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0345 Pollution--urban and regional (0305)
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting