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Santiago de Chile offers interesting platform for aerosol research

Santiago de Chile offers interesting platform for aerosol research

Chemical composition of submicron particles (aerodynamic diameter < 1.0 μm) was investigated at three locations, rural, urban, and urban receptor environment, in the Santiago Metropolitan Region (SMR), Chile.

Measured aerosol species were black carbon (BC), chloride, nitrate, sulfate, ammonium, and organic matter. Additionally, ozone concentration and meteorological parameters were obtained from the public air quality network. The average mass concentration of submicron particles was smallest in winter at the rural site (13 µg m-3) and largest in winter at the urban site (44 µg m-3).

Both winter and spring the mass of submicron particles was dominated by organic matter followed by nitrate, ammonium, black carbon, sulfate, and chloride. In general, all the measured species were present in higher concentrations during winter, except sulfate that increased during spring. Based on wind patterns and the hourly profiles of chemical species, the study shows that during daytime the polluted air masses from the urban center can move to the northeast part of the region (urban receptor site) leading to the formation of submicron particles as well as photochemical ozone.

More information:

Researcher Hilkka Timonen,  hilkka.timonen@fmi.fi

Researcher Sanna Saarikoski, sanna.saarikoski@fmi.fi

Tagle, M., Reyes, F., Vásquez, Y., Carbone, S., Saarikoski, S., Timonen, H., Gramsch, E., and Oyola, P.: Spatiotemporal variation in composition of submicron particles in Santiago Metropolitan Region, Chile, Frontiers of Environmental Science, doi: 10.3389/fenvs.2018.00027, 2018.



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Contact information

Scientific Director Ari Laaksonen
tel. +358 539 5530

Meteorological and Marine Research Programme
Director Sami Niemelä
tel. +358 29 539 4172

Climate Research Programme
Director  Hannele Korhonen
tel. +358  29 539 2135

Space and Earth Observation Centre
Director Jouni Pulliainen
tel. +358 29 539 4701

FMI publications

FMI´s own publications series are:

  • FMI Contributions: high-quality peer-reviewed research results, mainly doctoral dissertations
  • FMI Reports: current research results mainly for customers and other stakeholders

All publications from 2016 onwards can be found on Helda.