Partitioning of Black Carbon between ultrafine and fine particle modes in an urban airport vs. urban background environment

F. Costabile, F. Angelini, F. Barnaba, G.P. Gobbi

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6 Citations (Scopus)

Abstract

In this work, we characterize the Black Carbon (BC) aerosol in an urban airport vs. urban background environment with the objective to evaluate when and how the ultrafine BC dominates the bulk aerosol. Aerosol optical and microphysical properties were measured in a Mediterranean urban area (Rome) at sites impacted by BC sources including fossil fuels (FF), and biomass burning (BB). Experimental BC data were interpreted through measurement-constrained simulations of BC microphysics and optical properties. A "scheme" to separate the ultrafine BC was experimented on the basis of the relation found between changes in the BC partitioning between Aitken and accumulation mode particles, and relevant changes in particle size distribution and optical properties of the bulk aerosol. This separation scheme, applied to experimental data, proved useful to reveal the impact of airport and road traffic emissions. Findings may have important atmospheric implications. The experimented scheme can help separating different BC sources (FF, BB, "aged" BC) when BC size distributions may be very difficult to obtain (satellite, columnar observations, routine monitoring). Indeed, separating the ultrafine BC from the fine BC may provide significant benefits in addressing BC impact on air quality and climate.
Original languageEnglish
Pages (from-to)136 - 144
Number of pages9
JournalAtmospheric Environment
Volume102
Issue number1
DOIs
Publication statusPublished - 1 Feb 2015
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Atmospheric Science

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