PM2.5 concentration from bus traffic in Helsinki in 2020

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Scope

  • spatial limits: Helsinki metropolitan area
  • temporal limits: year 2020
  • type of pollutant: primary PM2.5
  • source of pollutant: bus traffic

Definition

Causality

List of parents:

  • PM2.5 emissions from bus traffic

Data

List of data files or sources:

  • Database from EXPOLIS study (1996-1997) - individual measurements of total outdoor PM exposure
  • Database from ULTRA study - fixed monitoring sites

Formula

Total PM2.5 exposure/concentration was used as the starting point for the calculations of PM2.5 due to bus traffic, subtracting the contributions from other sources.

E(bus) = (Ec-Elrt)/f(tr)*f(bus)

fi = (Emi * wfi)/Sum(Emi*wfi)

Unit

ug/m3

Result

estimation of the average bus related primary PM2.5 in 2020 in Helsinki area

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