HR: 0800h
AN: A21A-0017 [Abstracts]
TI: Transport of NOx and its reaction products in a global model and its impact on ozone
AU: * Sillman, S
EM: sillman@umich.edu
AF: University of Michigan, AOSS
2455 Hayward Street, Ann Arbor, MI 48109-2143, United States
AU: Penner, J E
EM: penner@umich.edu
AB:
Intercontinental transport of O3 is often attributed to the direct transport of O3 following its formation in
source regions. However, transport of O3 and other reactive tropospheric gases and aerosols are also
influenced by the transport of NOx and NOx reaction products, which have lifetimes ranging from hours to a week
or longer. Here, we show results from a global model that includes tracers for the source regions of NOx and
each of its major reaction products (PAN, HNO3, alkyl nitrates). The model (IMPACT) includes detailed
representation of organic nitrates formed from isoprene and there role as precursors of O3. Sources of
O3 are also traced based on the traced source of NOx associated with ozone formation. This results in a
different view of the sources and transport of O3 than can be obtained when only transport of O3 is
included. Tracers of NOx and NOx reaction products will also be used to identify correlation patterns associated
with intercontinental transport.
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting