Phoenix, Arizona, revisited : indications of aerosol effects on O{sub 3}, NO{sub 2}, UV-B, and NO{sub 3}.

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Fine particulate matter and tropospheric ozone levels are of concern because of their potential for health impacts, as well as their radiative effects. Both ozone and PM-2.5 standards are being exceeded in many urban and regional areas where transport and background levels can appreciably affect observed concentrations. Anthropogenic nitrogen oxides and other primary pollutant species can interact with natural organics to form secondary aerosol products via synthesis of nitric acid and its subsequent reaction with ammonia to yield ammonium nitrate. In addition, natural organics and lower-reactivity organic compounds, particularly aromatic species and monoterpenes, can generate secondary organic aerosols, both of ... continued below

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10 p.

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Gaffney, J. S.; Marley, N. A.; Drayton, P. J.; Cunningham, M. M.; Baird, J. C.; Dintaman, J. et al. September 30, 1999.

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Fine particulate matter and tropospheric ozone levels are of concern because of their potential for health impacts, as well as their radiative effects. Both ozone and PM-2.5 standards are being exceeded in many urban and regional areas where transport and background levels can appreciably affect observed concentrations. Anthropogenic nitrogen oxides and other primary pollutant species can interact with natural organics to form secondary aerosol products via synthesis of nitric acid and its subsequent reaction with ammonia to yield ammonium nitrate. In addition, natural organics and lower-reactivity organic compounds, particularly aromatic species and monoterpenes, can generate secondary organic aerosols, both of which contribute to the formation of PM-2.5. Long-range transport and chemical transformation of hydrocarbons and NO{sub x} via both photochemical reactions and nighttime chemistry can generate significant regional levels of ozone (O{sub 3}) and other oxidants, such as peroxyacyl nitrates.

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10 p.

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OSTI as DE00750464

Medium: P; Size: 10 pages

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  • Symposium on Atmospheric Chemistry Issues in the 21st Century, Long Beach, CA (US), 01/09/2000--01/14/2000

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  • Report No.: ANL/ER/CP-99195
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 750464
  • Archival Resource Key: ark:/67531/metadc704192

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  • September 30, 1999

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 6, 2017, 6:49 p.m.

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Gaffney, J. S.; Marley, N. A.; Drayton, P. J.; Cunningham, M. M.; Baird, J. C.; Dintaman, J. et al. Phoenix, Arizona, revisited : indications of aerosol effects on O{sub 3}, NO{sub 2}, UV-B, and NO{sub 3}., article, September 30, 1999; Illinois. (digital.library.unt.edu/ark:/67531/metadc704192/: accessed November 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.