Number Size Distribution of Ambient Particles in a Typical Urban Site: The First Polish Assessment Based on Long-Term (9 Months) Measurements

Table 3

Average number concentrations of PM observed at various urban background sites in the world.

Country	City, measurement period	Number concentration (cm^−3)	Reference
Poland	Zabrze, Jan.–Oct. 𝟐𝟎𝟏𝟎^𝟏	Whole period: 𝟔.𝟐𝟑⋅𝟏𝟎^𝟑; Summer: 𝟒.𝟗𝟓⋅𝟏𝟎^𝟑; Winter: 𝟖.𝟖𝟎⋅𝟏𝟎^𝟑	The following study
Austria	Vienna	8.0⋅10^3	[12]
Czech Republic	Prague	7.3⋅10^3	[12]
Finland	Helsinki, 2001–2003	Weekdays: 1.1⋅10^4; Weekends: 0.69⋅10^4	[10]
France	Marseille, 2002-2003	1⋅10^4	[55]
Germany	Augsburg, 2001–2003	Weekdays: 1⋅10^4; Weekends: 0.82⋅10^4	[10]
	Hohenpeißenberg, 2003-2004	Summer: 3.10⋅10^3; Winter: 1.81⋅10^3	[15]
Greece	Athens, 2002-2003	1⋅10^4	[55]
Hungary	Budapest	10.6⋅10^3	[12]
Italy	Rome, 2001–2003	4.3⋅10^4	[10]
	Milan, Sept 2003–Aug 2004	Cold season: 2.5⋅10^4; Warm season: 1.3⋅10^4	[46]
The Netherlands	Utrecht, Oct.-Nov. 2008	Street location: 3.86⋅10^4; Suburban background: 133⋅10^4; City background: 141⋅10^4	[56]
Spain	Barcelona, 2001–2003	Weekdays: 3.9⋅10^4; Weekends: 2.76⋅10^4	[10]
	Barcelona, 2003-2004	2.3⋅10^4	[10]
Sweden	Stockholm, 2001–2003	Weekdays: 1.0⋅10^4; Weekends: 0.8⋅10^4	[10]
Switzerland	Zurich, 2001-2002	4.7⋅10^4	[20]
UK	London, 2004-2005	5⋅10^4	[57]
Australia	Brisbane	1.5⋅10^4	[58]
USA	Atlanta, 1998-1999	9.7⋅10^4	[59]

1Values given in the table were obtained on the basis of average 1-hour concentrations (Table 1).