Black carbon over Mexico
نویسندگان
چکیده
Black carbon over Mexico: the effect of atmospheric transport on mixing state, mass absorption cross-section, and BC/CO ratios R. Subramanian, G. L. Kok, D. Baumgardner, A. Clarke, Y. Shinozuka, T. L. Campos, C. G. Heizer, and B. B. Stephens Droplet Measurement Technologies, Boulder, CO 80301, USA Universidad Nacional Autónoma de México, Mexico City, Mexico University of Hawai’i, Honolulu, HI 96822, USA National Center for Atmospheric Research, Boulder, CO 80305, USA Received: 11 March 2009 – Accepted: 23 March 2009 – Published: 6 April 2009 Correspondence to: R. Subramanian ([email protected]) Published by Copernicus Publications on behalf of the European Geosciences Union.
منابع مشابه
Black carbon from aviation
Simulating the global atmospheric black carbon cycle: a revisit to the contribution of aircraft emissions J. Hendricks, B. Kärcher, A. Döpelheuer , J. Feichter, U. Lohmann, and D. Baumgardner DLR-Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany DLR-Institut für Antriebstechnik, Köln, Germany Now at DLR-Vorstand, Köln, Germany Max-Planck-Institut für Meteorologie, Hamburg, Germany 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 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 کاملEffect of carbon black content on the microwave absorbing properties of CB/epoxy composites
To prevent serious electromagnetic interference, a single-layer and double layer wave-absorbing coating employing complex absorbents composed of carbon black with epoxy resin as matrix was prepared. The morphologies of carbon black /epoxy composites were characterized by scanning electron microscope and atomic force microscope, respectively. The carbon black particles exhibit obvious polyarom...
متن کامل