Secondary organic aerosol formation from anthropogenic air pollution: Rapid and higher than expected
Por:
Volkamer R., Jimenez J.L., San Martini F., Dzepina K., Zhang Q., Salcedo D., Molina L.T., Worsnop D.R., Molina M.J.
Publicada:
1 ene 2006
Resumen:
The atmospheric chemistry of volatile organic compounds (VOCs) in urban areas results in the formation of 'photochemical smog', including secondary organic aerosol (SOA). State-of-the-art SOA models parameterize the results of simulation chamber experiments that bracket the conditions found in the polluted urban atmosphere. Here we show that in the real urban atmosphere reactive anthropogenic VOCs (AVOCs) produce much larger amounts of SOA than these models predict, even shortly after sunrise. Contrary to current belief, a significant fraction of the excess SOA is formed from first-generation AVOC oxidation products. Global models deem AVOCs a very minor contributor to SOA compared to biogenic VOCs (BVOCs). If our results are extrapolated to other urban areas, AVOCs could be responsible for additional 3-25 Tg yr-1 SOA production globally, and cause up to -0.1 W m-2 additional top-of-the- atmosphere radiative cooling. Copyright 2006 by the American Geophysical Union.
Filiaciones:
Volkamer R.:
Earth Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States
Department of Chemistry and Biochemistry, University of California, San Diego, San Diego, CA, United States
Department of Chemistry and Biochemistry, University of California, MC 0314, 9500 Gillman Drive, San Diego, CA 92093-0314, United States
Jimenez J.L.:
Department of Chemistry, Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States
Department of Chemistry, CIRES, University of Colorado, Boulder, CO 80309-0216, United States
San Martini F.:
Earth Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States
National Academy of Sciences, Washington, DC, United States
National Academy of Sciences, Washington, DC 20001, United States
Dzepina K.:
Department of Chemistry, Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States
Department of Chemistry, CIRES, University of Colorado, Boulder, CO 80309-0216, United States
Zhang Q.:
Department of Chemistry, Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States
Atmospheric Science Research Center, State University of New York at Albany, Albany, NY, United States
Atmospheric Science Research Center, State University of New York at Albany, 251 Fuller Rd., Albany, NY 12203, United States
Salcedo D.:
Centro de Investigaciones Quimicas, Universidad Autonoma del Estado de Morelos, Cuernavaca, Mexico
Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universiadad 1001, Cuernavaca Morelos 62209, Mexico
Molina L.T.:
Earth Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States
MCE2, San Diego, CA, United States
MCE2, 3262 Holiday Ct., San Diego, CA 92037-1811, United States
Worsnop D.R.:
Aerodyne Research, Billerica, MA, United States
Aerodyne Research, Billerica, MA 01821-3976, United States
Molina M.J.:
Earth Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States
Department of Chemistry and Biochemistry, University of California, San Diego, San Diego, CA, United States
Department of Chemistry and Biochemistry, University of California, MC 0314, 9500 Gillman Drive, San Diego, CA 92093-0314, United States
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