Table 2.

Summary statistics for hourly air pollutants and meteorology in Augsburg, Germany, from 2005 to 2015 (data on 96,408 consecutive hours).

Variable	Missing (%)	$\text{Mean}\pm \text{SD}$	Min	P25	P50	P75	Max	IQR
PNC (${\text{particles}/\mathrm{cm}}^3$)
${\text{PNC}}_{10–30}$	4.6	$\mathrm{3,825}\pm \mathrm{5,455}$	0	1,689	2,828	4,733	934,944	3,044
${\text{PNC}}_{30–100}$	4.6	$\mathrm{4,561}\pm \mathrm{4,553}$	0	2,036	3,320	5,643	291,464	3,607
${\text{PNC}}_{10–100}$	4.6	$\mathrm{8,387}\pm \mathrm{8,721}$	0	3,911	6,333	10,440	1,009,751	6,528
${\text{PNC}}_{100–500}$	4.8	$\mathrm{1,666}\pm \mathrm{1,363}$	0	811	1,301	2,074	33,335	1,263
PLC (${\mathrm{mm}/\mathrm{cm}}^3$)	6.1	$0.6\pm 0.4$	0	0.3	0.5	0.7	7.3	0.4
PSC (${\mathrm{\mu }\mathrm{m}}^2{/\mathrm{cm}}^3$)a	9.4	$42.9\pm 32.7$	0.3	21.5	34.1	53.4	416.4	31.9
${\mathrm{PM}}_{2.5}$ (${\mathrm{\mu }\mathrm{g}/\mathrm{m}}^3$)	0.4	$15.0\pm 13.0$	0	6.4	11.6	19.6	156.4	13.2
${\mathrm{PM}}_{10}$ (${\mathrm{\mu }\mathrm{g}/\mathrm{m}}^3$)	0.4	$19.2\pm 14.8$	0	9.3	15.9	25.1	386.5	15.8
${\mathrm{NO}}_2$ (${\mathrm{\mu }\mathrm{g}/\mathrm{m}}^3$)	0.6	$31.7\pm 18.2$	1.0	18.5	28.0	41.0	189.0	22.5
${\mathrm{O}}_3$ (${\mathrm{\mu }\mathrm{g}/\mathrm{m}}^3$)	0.6	$44.6\pm 33$	0	16.0	42.5	66.0	196.0	50.0
BC (${\mathrm{\mu }\mathrm{g}/\mathrm{m}}^3$)	8.4	$1.8\pm 1.5$	0.2	1.0	1.4	2.2	25.0	1.2
Air temperature (°C)	0.1	$10.0\pm 9.1$	$-24.1$	3.0	9.7	16.1	41.1	13.1
Relative humidity (%)	0.3	$75.6\pm 18.9$	17.8	62.4	82.0	91.5	99.9	29.1

Note: BC, black carbon; IQR, interquartile range; ${\mathrm{NO}}_2$, nitrogen dioxide; ${\mathrm{O}}_3$, ozone; PLC, particle length concentration; ${\mathrm{PM}}_{2.5}$, particulate matter with an aerodynamic diameter below $2.5\mathrm{\mu }\mathrm{m}$; ${\mathrm{PM}}_{10}$, particulate matter with an aerodynamic diameter below $10\mathrm{\mu }\mathrm{m}$; PNC, particle number concentration; ${\text{PNC}}_{10–30}$, PNC of particles with $10–30\text{\hspace{0.17em} nm}$ mobility diameter; ${\text{PNC}}_{30–100}$, PNC of particles with $30–100\text{\hspace{0.17em} nm}$ mobility diameter; ${\text{PNC}}_{10–100}$, PNC of particles with $10–100\text{\hspace{0.17em} nm}$ mobility diameter; ${\text{PNC}}_{100–500}$, PNC of particles with $100–500\text{\hspace{0.17em} nm}$ mobility diameter; PSC, particle surface concentration; SD, standard deviation.

^aFor PSC, data on 64,248 consecutive hours during 1 January 2005–30 April 2012 were used.