Primary PM2.5 emissions from bus traffic in Helsinki Metropolitan Area

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Scope

Total mass PM2.5 emissions from the bus fleet per year in Helsinki Metropolitan Area (HMA)in 2020.

Definition

Causality

List of parents:

Data

List of data files or sources:

Data tables can be found from the analytica model: File:Gasbus model 01.ANA

  • Bus activities
    • Bus kilometres travelled: 77000000 km (1999) [1]
    • Relative bus activity: trips per day: 1.596 (in 2020, relative to 1999) (used as a constant but no uncertainty considered) [2]
  • Bus emission factors
    • Emission factor: 0.321 g/km (1999) [3]
    • Relative emission factors depending to the technology (relative to current fleet) [4]
    • Relative emission factor uncertainty (for diesel with filter and natural gas, based on author judgement)
  • Total emission from buses kg/a in 1999 (this relates to all pollutants and is needed to deduce the primary PM 2.5emission fraction) [5]

Formula

Analytica_id:

Var a:=bus_km*(emission_factor/1000);
a:=a*Relative_emission_fa;
a:=a*Relative_emission_f2;
a*Rel_bus_activity

The complete formula can be found from the analytica model: File:Gasbus model 01.ANA

Unit

Kg/year

Result

  • Year: 2020, using 4 different scenarios, defined in
Min Mean Max Std. Dev. 0.05 0.25 0.5 0.75 0.95
BAU A 3.95E+04 3.95E+04 3.95E+04 0.01179 3.95E+04 3.95E+04 3.95E+04 3.95E+04 3.95E+04
EURO 3 D3 1.96E+04 1.96E+04 1.96E+04 0.01235 1.96E+04 1.96E+04 1.96E+04 1.96E+04 1.96E+04
CRT filter C 6013 9956 1.39E+04 1626 7233 8790 9956 1.11E+04 1.27E+04
Natural gas G31 4622 5763 6904 470.6 4975 5426 5763 6101 6551

References

  1. ↑ YTV, Helsinki Metropolitan Area Council. (1999). Vaihtoehtoisten polttoaineiden k‰yttˆmahdollisuudet joukkoliikenteessä pääkaupunkiseudulla [The possibilities to use alternative fuels in public transport in the Helsinki metropolitan area]. Helsinki Metropolitan Area Council Publication Series B 1999:5 (in Finnish)
  2. ↑ YTV, Helsinki Metropolitan Area Council. (1999). Helsinki Metropolitan Area Transport System Plan PLJ 1998. Helsinki Metropolitan Area Council Publication Series A 1999:4
  3. ↑ YTV, Helsinki Metropolitan Area Council. (1999). Vaihtoehtoisten polttoaineiden k‰yttˆmahdollisuudet joukkoliikenteess‰ p‰‰kaupunkiseudulla [The possibilities to use alternative fuels in public transport in the Helsinki metropolitan area]. Helsinki Metropolitan Area Council Publication Series B 1999:5 (in Finnish).
  4. ↑ YTV, Helsinki Metropolitan Area Council. (1999). Vaihtoehtoisten polttoaineiden k‰yttˆmahdollisuudet joukkoliikenteessä pääkaupunkiseudulla [The possibilities to use alternative fuels in public transport in the Helsinki metropolitan area]. Helsinki Metropolitan Area Council Publication Series B 1999:5 (in Finnish)
  5. ↑ YTV, Helsinki Metropolitan Area Council. (1999). Vaihtoehtoisten polttoaineiden k‰yttˆmahdollisuudet joukkoliikenteess‰ p‰‰kaupunkiseudulla [The possibilities to use alternative fuels in public transport in the Helsinki metropolitan area]. Helsinki Metropolitan Area Council Publication Series B 1999:5 (in Finnish).
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