Aerosol Optical Model of Dongsha Area Based on AERONET

Shunping Chen; Congming Dai; Nana Liu; Wentao Lian; Cong Zhang; Fan Wu; Yuxuan Zhang; Heli Wei

doi:10.3788/AOS230587

Acta Optica Sinica, Volume. 43, Issue 24, 2401002(2023)

Aerosol Optical Model of Dongsha Area Based on AERONET

Shunping Chen^1,2,3, Congming Dai^1,3、*, Nana Liu^1,3, Wentao Lian^1,3,4, Cong Zhang^1,2,3, Fan Wu^1,3,4, Yuxuan Zhang^1,3,4, and Heli Wei^1,3,4

Author Affiliations

¹Key Laboratory of Atmospheric Optics, Chinese Academy of Sciences, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui , China

²Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230026, Anhui , China

³Advanced Laser Technology Laboratory of Anhui Province, Hefei 230037, Anhui , China

⁴School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026, Anhui , China

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Figures & Tables(13)

Fig. 1. Sequences of 550 nm AOD and AE monthly mean, and their frequencies in Dongsha_Island. (a) AOD monthly mean; (b) AE monthly mean; (c) frequencies of AOD and AE

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Fig. 2. Sequences of monthly averaged AOD and AE in Dongsha_Island

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Fig. 3. Monthly mean AOD spectra of Dongsha_Island

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Fig. 4. Fitting results of normalized aerosol size distribution in Dongsha_Island

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Fig. 5. Monthly sequences of fitted AE and effective radius

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Fig. 6. Comparison of calculated results of aerosol optical model and measured results at 2021-07-14T10:09:15 in Dongsha_Island. (a) AOD spectrum comparison; (b) transmittance spectrum comparison

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Fig. 7. Distribution of monthly extinction coefficient $β_{e x t}$

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Fig. 8. Distribution of monthly absorption coefficient $β_{a b s}$

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Fig. 9. Monthly tendency of extinction coefficient of 3-5 $μ m$ and 8-12 $μ m$ wavebands. (a) 3-5 $μ m$ ; (b) 8-12 $μ m$

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Fig. 10. Monthly tendency of averaged transmittance of 3-5 $μ m$ and 8-12 $μ m$ wavebands

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Table 1. Fitting coefficients of particle size distribution in Dongsha_Island

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Table 1. Fitting coefficients of particle size distribution in Dongsha_Island

Month	Sample number	$N_{1}$	$σ_{1}$	$r_{m 1}$	$N_{2}$	$σ_{2}$	$r_{m 2}$	$N_{3}$	$σ_{3}$	$r_{m 3}$
Jan.	46	1.08	1.61	9.71×10^-2	1.25×10^-2	2.11	2.70×10^-1	1.65×10^-4	1.52	2.43
Feb.	70	1.04	1.59	9.82×10^-2	5.50×10^-3	1.94	3.86×10^-1	1.65×10^-4	1.56	2.20
Mar.	134	1.02	1.53	1.03×10^-1	5.90×10^-3	2.10	2.99×10^-1	7.80×10^-5	1.55	2.16
Apr.	133	1.00	1.56	1.05×10^-1	6.50×10^-3	2.11	3.00×10^-1	6.79×10^-5	1.59	2.04
May	114	1.04	1.54	1.03×10^-1	1.15×10^-2	2.13	2.48×10^-1	1.13×10^-4	1.56	2.20
Jun.	74	1.01	1.55	1.00×10^-1	1.40×10^-2	2.11	2.70×10^-1	1.44×10^-4	1.55	2.23
Jul.	27	1.02	1.48	9.39×10^-2	1.16×10^-2	2.04	2.87×10^-1	9.67×10^-5	1.49	2.67
Aug.	30	1.00	1.46	9.71×10^-2	1.15×10^-2	2.09	2.74×10^-1	6.08×10^-5	1.50	2.71
Sep.	64	1.06	1.61	9.82×10^-2	1.24×10^-2	2.14	2.56×10^-1	2.01×10^-4	1.64	1.91
Oct.	65	1.03	1.59	1.07×10^-1	8.30×10^-3	2.02	2.58×10^-1	1.57×10^-4	1.62	1.88
Nov.	18	1.06	1.50	8.96×10^-2	1.61×10^-2	2.14	2.28×10^-1	1.46×10^-4	1.53	2.31
Dec.	31	1.05	1.58	1.01×10^-1	7.40×10^-3	2.10	2.86×10^-1	1.44×10^-4	1.57	2.08

Table 2. Error statistics for model AOD spectra （N_tot=7649）

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Table 2. Error statistics for model AOD spectra （N_tot=7649）

Month	RMSE of AOD spectra							Sample number
Month	340 nm	380 nm	440 nm	500 nm	675 nm	870 nm	1020 nm	Sample number
Jan.	0.029	0.023	0.016	0.011	0.013	0.018	0.021	267
Feb.	0.035	0.024	0.017	0.013	0.013	0.023	0.027	700
Mar.	0.074	0.049	0.028	0.015	0.017	0.026	0.029	853
Apr.	0.058	0.044	0.027	0.016	0.016	0.030	0.034	916
May	0.029	0.025	0.017	0.011	0.013	0.017	0.020	1920
Jun.	0.041	0.031	0.021	0.015	0.014	0.024	0.030	635
Jul.	0.123	0.089	0.053	0.024	0.019	0.030	0.039	381
Aug.	0.030	0.030	0.024	0.013	0.013	0.017	0.022	381
Sep.	0.035	0.029	0.017	0.015	0.012	0.018	0.019	634
Oct.	0.047	0.041	0.025	0.025	0.013	0.025	0.026	601
Nov.	0.021	0.018	0.015	0.011	0.011	0.013	0.015	338
Dec.	0.034	0.020	0.012	0.011	0.011	0.013	0.013	23
Averaged value in period 2	0.051	0.038	0.024	0.015	0.010	0.014	0.022

Table 3. Error statistics for spectrum transmittance （N_tot=7649）

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Table 3. Error statistics for spectrum transmittance （N_tot=7649）

Month	RMSE of relative errors /%							Sample number
Month	340 nm	380 nm	440 nm	500 nm	675 nm	870 nm	1020 nm	Sample number
Jan.	2.87	2.26	1.59	1.13	1.29	1.82	2.10	267
Feb.	3.40	2.39	1.67	1.26	1.26	2.34	2.70	700
Mar.	6.93	4.65	2.70	1.46	1.72	2.60	2.91	853
Apr.	5.57	4.32	2.63	1.63	1.60	3.05	3.44	916
May	2.92	2.54	1.72	1.15	1.29	1.67	2.04	1920
Jun.	3.99	3.06	2.10	1.52	1.44	2.45	3.09	635
Jul.	9.30	7.21	4.67	2.32	2.01	2.96	3.79	381
Aug.	3.03	3.06	2.42	1.26	1.31	1.71	2.17	381
Sep.	3.49	2.84	1.70	1.53	1.19	1.78	1.92	634
Oct.	4.62	4.02	2.48	2.47	1.27	2.56	2.64	601
Nov.	2.11	1.84	1.47	1.13	1.13	1.27	1.47	338
Dec.	3.34	2.02	1.20	1.12	1.05	1.29	1.31	23
Averaged value is period 2	4.64	3.59	2.30	1.53	1.42	2.26	2.63

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Shunping Chen, Congming Dai, Nana Liu, Wentao Lian, Cong Zhang, Fan Wu, Yuxuan Zhang, Heli Wei. Aerosol Optical Model of Dongsha Area Based on AERONET[J]. Acta Optica Sinica, 2023, 43(24): 2401002

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