HR: 09:04h
AN: A21G-05 [Abstracts]
TI: Impacts of primary formaldehyde on the photochemistry in Mexico City
AU: * Lei, W
EM: wflei@mit.edu
AF: Department of Earth Atmospheric and Planetary Sciences, Massachusetts Institute of
Technology, 77 massachusetts avenue, Cambridge, MA 02139, United States
AU: * Lei, W
EM: wflei@mit.edu
AF: Molina Center for Energy and the Environment, 3262 Holiday Ct Suite 201, La Jolla, CA
92037, United States
AU: Zavala, M
EM: miguelz@mit.edu
AF: Department of Earth Atmospheric and Planetary Sciences, Massachusetts Institute of
Technology, 77 massachusetts avenue, Cambridge, MA 02139, United States
AU: Zavala, M
EM: miguelz@mit.edu
AF: Molina Center for Energy and the Environment, 3262 Holiday Ct Suite 201, La Jolla, CA
92037, United States
AU: de Foy, B
EM: bdefoy@slu.edu
AF: Molina Center for Energy and the Environment, 3262 Holiday Ct Suite 201, La Jolla, CA
92037, United States
AU: de Foy, B
EM: bdefoy@slu.edu
AF: Department of Earth and Atmospheric Sciences, Saint Louis University, 3642 Lindell Blvd.,
St. Louis, MO 63108, United States
AU: Volkamer, R
EM: Rainer.Volkamer@Colorado.EDU
AF: Department of Earth Atmospheric and Planetary Sciences, Massachusetts Institute of
Technology, 77 massachusetts avenue, Cambridge, MA 02139, United States
AU: Volkamer, R
EM: Rainer.Volkamer@Colorado.EDU
AF: Department of Chemistry and Biochemistry, University of Colorado at Boulder, 215 UCB,
Boulder, CO 80309,
AU: Molina, M J
EM: mjmolina@ucsd.edu
AF: Department of Earth Atmospheric and Planetary Sciences, Massachusetts Institute of
Technology, 77 massachusetts avenue, Cambridge, MA 02139, United States
AU: Molina, M J
EM: mjmolina@ucsd.edu
AF: Department of Chemistry and Biochemistry, University of California, San Diego, 9500
Gilman Dr., La Jolla, CA 92093, United States
AU: Molina, L T
EM: ltmolina@mit.edu
AF: Department of Earth Atmospheric and Planetary Sciences, Massachusetts Institute of
Technology, 77 massachusetts avenue, Cambridge, MA 02139, United States
AU: Molina, L T
EM: ltmolina@mit.edu
AF: Molina Center for Energy and the Environment, 3262 Holiday Ct Suite 201, La Jolla, CA
92037, United States
AB:
Mexico City Metropolitan Area (MCMA) is characterized with unusually high emission rates of formaldehyde
(HCHO), and the primary HCHO contributes significantly to the HCHO ambient level. As an important radical
source, HCHO with a high concentration may have significant influence on the urban photochemistry. In this
study, a 3-D chemical transport model (CAMx) is employed to examine the impacts of primary HCHO on the
ambient HCHO concentration, the radical budget (radical initiation, propagation and termination as well as radical
concentration), and ultimately on the ozone photochemical formation in the MCMA under different meteorological
conditions. Simulated HCHO concentrations are compared with concurrent MCMA-2003 measurements, and the
simulated partitioning between the primary and secondary sources is compared with results from a statistical
analysis. The HONO contribution from the heterogeneous source is also considered.
DE: 0365 Troposphere: composition and chemistry
DE: 0466 Modeling
DE: 0478 Pollution: urban, regional and global (0345, 4251)
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting