Articles | Volume 15, issue 16
https://doi.org/10.5194/acp-15-9693-2015
https://doi.org/10.5194/acp-15-9693-2015
Research article
 | 
28 Aug 2015
Research article |  | 28 Aug 2015

Seasonal and diurnal trends in black carbon properties and co-pollutants in Mexico City

A. Retama, D. Baumgardner, G. B. Raga, G. R. McMeeking, and J. W. Walker

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Cited articles

Arnott, W. P, Moosmüller, H., and Walker, J. W.: Nitrogen Dioxide and Kerosene-Fla.me Soot Calibration of Photoacoustic Instruments for Measurement of Light Absorption by Aerosols, Rev. Sci. Instrum., 71, 4545–4552, 2000.
Arnott, W. P., Hamasha K., Moosmüller, H., Sheridan P. J., and Ogren J. A.: Towards Aerosol Light-Absorption Measurements with a 7-Wavelength Aethalometer: Evaluation with a Photoacoustic Instrument and 3-Wavelength Nephelometer, Aerosol Sci. Tech., 39, 17–29, 2005.
Arnott, W. P., Walker, J. W., Moosmüller, H., Elleman, R. A., Jonsson, H. H., Buzorius, G., Conant, W. C., Flagan, R. C., and Seinfeld, J. H.: Photoacoustic insight for aerosol light absorption aloft from meteorological aircraft and comparison with particle soot absorption photometer measurements: DOE Southern Great Plains climate research facility and coastal stratocumulus imposed perturbation experiments, J. Geophys. Res.-Atmos., 111, D05S02, https://doi.org/10.1029/2005JD005964, 2006.
Baron, P. A. and Willeke, K.: Aerosol Measurements Principles, Techniques and Applications, John Wiley and Sons, New York, NY, 1133 pp., 2001.
Barth, M. C. and Church, A. T.: Regional and global distributions and lifetimes of sulfate aerosols from Mexico City and southeast China, J. Geophy. Res, 104, 30231–30239. 1999.
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Short summary
Extended measurements of equivalent black carbon (eBC) derived from light absorption measurements have been made with a PAX over a 13 month period. The daily trends in eBC and other co-pollutants are evaluated with respect to season. The primary factors that led to large changes between the wet and dry seasons are the accelerated vertical mixing of boundary layer and free tropospheric air, by the formation of clouds and decreased actinic flux that reduces the production of ozone.
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