Comparison of measurements of peroxyacyl nitrates and primary carbonaceous aerosol concentrations in Mexico City determined in 1997 and 2003
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PAN and Carbonaceous Aerosol in Mexico City
Comparison of measurements of peroxyacyl nitrates and primary carbonaceous aerosol concentrations in Mexico City determined in 1997 and 2003 N. A. Marley, J. S. Gaffney, R. Ramos-Villegas, and B. Cárdenas González University of Arkansas at Little Rock, Little Rock, Arkansas, U.S.A. Secretariat of the Environment, Government of the Federal District, Mexico City, D.F., Mexico El Centro National d...
متن کاملInteractive comment on “Comparison of measurements of peroxyacyl nitrates and primary carbonaceous aerosol concentrations in Mexico
The paper reviews the potential atmospheric influences of ’megacities’ using Mexico City as a model and black carbon, peroxyacetyl nitrate (PAN), and ozone as the most important species. The authors compare concentrations found in 1997 to those found in 2003 and find substantial decreases in concentrations of PAN and ozone but not black carbon attributing vehicle fleet replacement to much of th...
متن کاملComparison of measurements of peroxyacyl nitrates and primary carbonaceous aerosol concentrations in Mexico City
The concentrations of peroxyacetyl nitrate (PAN) in ambient air can be a good indicator of air quality and the effectiveness of control strategies for reducing ozone levels in urban areas. As PAN is formed by the oxidation of reactive hydrocarbons in the presence of nitrogen dioxide (NO2), it is a direct measure of the peroxyacyl radical levels produced from reactive organic emissions in the ur...
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The concentration of gases and aerosol particles have been measured at the mountain site of Altzomoni, 4010 m in altitude, located 60 km southeast of Mexico City, 50 km east of Puebla and 70 km northeast of Cuernavaca. The objective of this study was to evaluate the properties of gases and particles in the Regional Mixed Layer (RML) of Mexico’s Megapolis. Altzomoni is generally above the RML fr...
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In order to determine the wavelength dependence of fine (<1 micron) atmospheric aerosol absorption in the Mexico City area, the absorption Ångstrom exponents (AAEs) were calculated from hourly averages of aerosol absorption measured at seven wavelengths (370, 450, 520, 590, 660, 880, and 950 nm) with an aethalometer during two field campaigns, the Mexico City Metropolitan Area study in April 20...
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تاریخ انتشار 2006