Interactive comment on “Comparison of measurements of peroxyacyl nitrates and primary carbonaceous aerosol concentrations in Mexico
نویسنده
چکیده
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 the decrease. High levels of black carbon relect the high use of diesel vehicles. This study points out that aignificant positive changes can be attained in a relatively short time period. Is it possible that some of the decrease in PAN levels from 1997 to 2003 are due to the 2003 study
منابع مشابه
Comparison of measurements of peroxyacyl nitrates and primary carbonaceous aerosol concentrations in Mexico City determined in 1997 and 2003
متن کامل
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 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...
متن کاملPhysical and chemical properties of the regional mixed layer of Mexico’s Megapolis
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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This paper is an essential contribution to marine aerosol research field as it reports on the state-of-the-art aerosol measurements in the under-researched oceanic region and I am looking forward to it being published. Ship-born campaigns are absolutely critical in areas where research infrastructures simply do not exist or hardly accessible and are superior to short-lasting airborne measuremen...
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