Difference between revisions of "PM2.5 concentration from bus traffic in Helsinki in 2020"

Revision as of 13:33, 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)
• Database from ULTRA study

Formula

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