Dust Aerosols Detected Using a Ground-Based Polarization Lidar and CALIPSO over Wuhan (30.5°N, 114.4°E), China

Table 2

Statistical characteristics of the dust events observed from October 2010 to September 2012 at Wuhan measured using the depolarization lidar and CALIPSO. The standard deviation of the mean values is shown. The maximum values and the minimum values of the optical properties are also shown in the parenthesis. Here, (H) and (L) represent the upper and lower layers, respectively.

Date	Top (km)	Base (km)	Thickness (km)	Centroid (km)			Extinction (km^−1)	AOD	Horizontal range	Vertical width
8–10 November 2010	2.62 ± 0.99	0.73 ± 1.03	1.89 ± 0.63	1.52 ± 0.98	0.09 ± 0.02; (0.06–0.32)	0.18 ± 0.09; (0.09–0.23)	0.09 ± 0.04; (0.01–0.21)	0.18 ± 0.09; (0.01–0.43)	2000 km	Surface-3 km
2–5 December 2010	2.43 ± 1.29	0.61 ± 1.33	1.82 ± 0.48	1.04 ± 0.77	0.11 ± 0.04; (0.06–0.41)	0.17 ± 0.05; (0.07–0.42)	0.19 ± 0.21; (0.01–3.03)	0.34 ± 0.27; (0.01–3.09)	2400 km	Surface-2 km
7–9 December 2010	2.22 ± 0.24	0.3	1.92 ± 0.23	1.02 ± 0.11	0.15 ± 0.02; (0.11–0.20)	0.27 ± 0.04; (0.18–0.33)	0.13 ± 0.03; (0.07–0.28)	0.26 ± 0.06; (0.13–0.61)	1300 km	Surface-2 km
26–28 December 2010	2.08 ± 0.82	0.64 ± 0.72	1.44 ± 0.38	1.16 ± 0.73	0.08 ± 0.03; (0.06–0.37)	0.19 ± 0.07; (0.08–0.41)	0.09 ± 0.10; (0.02–0.84)	0.13 ± 0.17; (0.02–0.37)	750 km	Surface-5 km
20-21 February 2011	1.74 ± 0.73	0.61 ± 0.75	1.12 ± 0.14	1.04 ± 0.84	0.10 ± 0.01; (0.08–0.13)	0.14 ± 0.05; (0.08–0.53)	0.40 ± 0.17; (0.05–0.78)	0.46 ± 0.19; (0.05–0.83)	1900 km (L) 900 km (H)	Surface-2 km (L) 2–8 km (H)
12-13 March 2011	3.44 ± 0.60	2.03 ± 0.20	1.41 ± 0.52	2.63 ± 0.23	0.13 ± 0.01; (0.07–0.17)	0.28 ± 0.02; (0.25–0.31)	0.06 ± 0.01; (0.04–0.09)	0.09 ± 0.02; (0.06–0.14)	—	—
22–29 April 2011	5.02 ± 1.99	1.52 ± 2.37	3.50 ± 1.72	3.04 ± 2.07	0.12 ± 0.03; (0.07–0.21)	0.24 ± 0.09; (0.09–0.40)	0.11 ± 0.08; (0.01–0.58)	0.38 ± 0.30; (0.01–1.84)	950 km (L) 750 km (H)	1–4 km (L) 3–9 km (H)
17–20 May 2011	4.74 ± 1.59	0.76 ± 0.93	3.98 ± 1.83	2.44 ± 0.93	0.14 ± 0.04; (0.06–0.24)	0.27 ± 0.11; (0.06–0.60)	0.14 ± 0.16; (0.02–0.89)	0.48 ± 0.30; (0.02–0.99)	1100 km	1–7 km
08-09 July 2011	2.73 ± 0.87	0.73 ± 1.06	2.00 ± 0.41	1.38 ± 1.02	0.12 ± 0.03; (0.07–0.56)	0.23 ± 0.05; (0.15–0.26)	0.15 ± 0.07; (0.02–0.50)	0.30 ± 0.13; (0.01–0.67)	—	—
23–25 December 2011	2.12 ± 1.38	0.81 ± 1.29	1.31 ± 0.31	1.41 ± 1.52	0.10 ± 0.01; (0.08–0.21)	0.17 ± 0.11; (0.09–0.40)	0.26 ± 0.16; (0.02–0.80)	0.35 ± 0.23; (0.02–1.07)	1600 km (L) 800 km (H)	Surface-2 km (L) 3–7 km (H)
6 January 2012	1.46 ± 0.09	0.3	1.16 ± 0.09	0.75 ± 0.12	0.09 ± 0.01; (0.08–0.11)	0.13 ± 0.10; (0.09–0.16)	0.38 ± 0.14; (0.13–0.70)	0.47 ± 0.19; (0.14–0.76)	—	—
31 March-1 April 2012	3.65 ± 1.98	1.51 ± 1.28	2.14 ± 0.39	2.36 ± 1.61	0.09 ± 0.01; (0.07–0.12)	0.22 ± 0.11; (0.12–0.25)	0.08 ± 0.06; (0.01–0.30)	0.15 ± 0.09; (0.01–0.43)	>1360 km (L) 2300 km (H)	Surface-3 km (L) 3–10 km (H)
25–28 April 2012	4.00 ± 2.34	2.13 ± 2.24	1.87 ± 0.62	2.95 ± 2.40	0.14 ± 0.05; (0.07–0.33)	0.17 ± 0.13; (0.17–0.44)	0.11 ± 0.09; (0.01–0.29)	0.20 ± 0.17; (0.01–0.64)	1800 km	Surface-6 km
Average	3.51	1.45	2.06	2.34	0.12	0.22	0.19	0.32	—	—