Difference between revisions of "PM2.5 concentration from bus traffic in Helsinki in 2020"
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=== Formula === | === Formula === | ||
| − | Total PM2.5 exposure/concentration was used as the starting point for the calculations of PM2.5 due to bus traffic. | + | 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) | + | E(bus) = (Ec-Elrt)/f(tr)*f(bus) |
fi = (Emi * wfi)/Sum(Emi*wfi) | fi = (Emi * wfi)/Sum(Emi*wfi) | ||
Revision as of 14:06, 19 February 2008
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
