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

Table 6

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 data is selected for strictly stable atmospheric stability cases 𝑧/𝐿>0.1.

Strictly stable condition (𝑧/𝐿>0.1)
PM2.5		Vd (mm/s)	Flux (𝜇g/m^2s)	Conc. (𝜇g/m^3)	Vd/𝑢^∗
Venice	Average	1.16	−0.023	36.9	0.0105
	Std. dev.	2.28	0.033	28.9	0.0176
	Median	0.47	−0.011	32.9	0.0041
	25th quartile	0.19	−0.021	13.3	0.0018
	75th quartile	1.21	−0.004	53.3	0.0108
Lecce 2005	Average	1.22	−0.012	11.5	0.0102
	Std. dev.	1.88	0.028	6.4	0.0111
	Median	0.52	−0.006	11.3	0.0056
	25th quartile	0.24	−0.011	5.6	0.0020
	75th quartile	1.36	−0.002	15.8	0.0128
Maglie	Average	1.08	−0.030	34.6	0.0104
	Std. dev.	1.52	0.043	24.7	0.0182
	Median	0.69	−0.011	30.7	0.0046
	25th quartile	0.18	−0.037	15.6	0.0016
	75th quartile	1.09	−0.005	53.7	0.00944
PNC		Vd (mm/s)	Flux (#/cm^2s)	Conc. (#/cm^3)	Vd/𝑢^∗
Antarctica	Average	1.15	−81.2	1101.0	0.0091
	Std. dev.	1.56	93.3	861.8	0.0109
	Median	0.63	−48.0	882.0	0.0055
	25th quartile	0.25	−114.1	401.0	0.0027
	75th quartile	1.34	−19.8	1633.9	0.0104
Bologna	Average	1.24	−1802.3	13989.4	0.0160
	Std. dev.	1.69	2970.2	5685.7	0.0288
	Median	0.71	−929.3	13383.9	0.0070
	25th quartile	0.31	−1928.9	10140.0	0.0030
	75th quartile	1.42	−380.0	16541.0	0.0147
Lecce 2010	Average	1.36	−1241.9	7811.3	0.0057
	Std. dev.	1.56	1723.4	1861.4	0.0087
	Median	0.86	−608.8	7178.1	0.0024
	25th quartile	0.08	−1385.9	6878.6	0.0001
	75th quartile	1.98	−55.0	8149.4	0.0069