Difference between revisions of "Primary PM2.5 emissions from bus traffic in Helsinki Metropolitan Area"

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

Revision as of 19:47, 28 April 2008

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Scope

Total mass primary 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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