Correlation of Dry Deposition Velocity and Friction Velocity over Different Surfaces for PM2.5 and Particle Number Concentrations

Table 3

Average (with standard deviation) and median (with 25th and 75th quartiles) values are reported for deposition velocities, fluxes, concentrations, and normalized deposition velocities for each site, separating PM2.5 from particle number data. In this table all data is considered, without any selection involving stability conditions.

All stability conditions
PM2.5		Vd (mm/s)	Flux (𝜇g/m^2s)	Conc. (𝜇g/m^3)	Vd/𝑢^∗
Venice	Average	2.81	−0.040	26.4	0.0108
	Std. dev.	4.70	0.064	25.5	0.0155
	Median	1.19	−0.017	18.0	0.0048
	25th quartile	0.38	−0.044	8.6	0.0019
	75th quartile	3.11	−0.006	35.4	0.0140
Lecce 2005	Average	4.32	−0.031	10.2	0.0103
	Std. dev.	6.16	0.047	5.9	0.0131
	Median	2.04	−0.019	9.8	0.0054
	25th quartile	0.85	−0.039	5.4	0.0025
	75th quartile	4.99	−0.006	14.5	0.0124
Maglie	Average	4.18	−0.035	13.4	0.0077
	Std. dev.	4.68	0.034	14.7	0.0091
	Median	2.49	−0.023	8.8	0.0055
	25th quartile	0.87	−0.052	5.7	0.0024
	75th quartile	5.78	−0.008	14.2	0.0096
PNC		Vd (mm/s)	Flux (#/cm^2s)	Conc. (#/cm^3)	Vd/𝑢^∗
Antarctica	Average	1.17	−89.2	1233.5	0.0095
	Std. dev.	1.55	97.6	1029.7	0.0107
	Median	0.62	−56.7	960.7	0.0059
	25th quartile	0.25	−119.6	423.3	0.0028
	75th quartile	1.51	−23.9	1762.5	0.0121
Bologna	Average	1.85	−2312.3	12599.3	0.0124
	Std. dev.	2.43	3387.9	5798.3	0.0208
	Median	1.03	−1200.0	11813.0	0.0063
	25th quartile	0.42	−2872.1	8400.4	0.0027
	75th quartile	2.25	−459.9	15638.0	0.0133
Lecce 2010	Average	5.77	−9718.7	12203.1	0.0122
	Std. dev.	5.74	18611.6	10821.5	0.0113
	Median	4.01	−3352.9	7266.9	0.0091
	25th quartile	1.47	−7648.1	5397.4	0.0038
	75th quartile	7.87	−1074.2	16887.1	0.0174