Research on Remote Sensing Retrieval of Bohai Sea Transparency Based on Sentinel-3 OLCI Image

Ling-ling JIANG; Long-xiao WANG; Lin WANG; Si-wen GAO; Jian-quan YUE

doi:10.3964/j.issn.1000-0593(2022)04-1209-08

Journals >Spectroscopy and Spectral Analysis >Volume 42 >Issue 4 >Page 1209 > Article

Spectroscopy and Spectral Analysis
Vol. 42, Issue 4, 1209 (2022)

Research on Remote Sensing Retrieval of Bohai Sea Transparency Based on Sentinel-3 OLCI Image

Ling-ling JIANG^1、*, Long-xiao WANG^{1、1; 2;}, Lin WANG^{2、2; *;}, Si-wen GAO^1、1;, and Jian-quan YUE^1、1;

Author Affiliations

¹1. College of Environment Science and Engineering, Dalian Maritime University, Dalian 116026, China

²2. National Marine Environmental Monitoring Center, Dalian 116023, China

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DOI: 10.3964/j.issn.1000-0593(2022)04-1209-08 Cite this Article

Ling-ling JIANG, Long-xiao WANG, Lin WANG, Si-wen GAO, Jian-quan YUE. Research on Remote Sensing Retrieval of Bohai Sea Transparency Based on Sentinel-3 OLCI Image[J]. Spectroscopy and Spectral Analysis, 2022, 42(4): 1209 Copy Citation Text

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Fig. 1. Distribution of sampling stations

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Fig. 2. In situ R_rs spectra

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Fig. 3. Comparison of in situ R_rs with Sentinel-3 derived OLCI R_rs

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Fig. 4. Comparison between in situ SDD and Sentinel-3 OLCI retrieved SDD

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Fig. 5. The spatial distribution of monthly average SDD of Bohai Sea in 2020

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Fig. 6. The monthly change trend of Bohai Sea SDD in 2020

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Band(λ/nm)	r	Band(λ/nm)	r
B1(400)	-0.53	B8(665)	-0.62
B2(412)	-0.54	B9(674)	-0.62
B3(442)	-0.57	B10(681)	-0.62
B4(490)	-0.59	B11(709)	-0.58
B5(510)	-0.62	B12(754)	-0.44
B6(560)	-0.69	B16(779)	-0.44
B7(620)	-0.66	B17(865)	-0.37

Table 1. Correlation between R_rs and SDD at central band

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Band/nm	r	Band/nm	r	Band/nm	r	Band/nm	r	Band/nm	r
400/510	0.25	413/560	0.57	443/620	0.90	490/665	0.78	560/620	0.87
400/560	0.59	413/620	0.90	443/665	0.83	490/674	0.81	560/665	0.61
400/620	0.90	413/665	0.85	443/674	0.84	490/681	0.81	560/674	0.70
400/665	0.86	413/674	0.87	443/681	0.84	510/620	0.89	560/681	0.75
400/674	0.88	413/681	0.87	490/510	0.43	510/665	0.74
400/681	0.87	413/510	0.16	490/560	0.60	510/674	0.79
413/510	0.23	443/560	0.51	490/620	0.90	510/681	0.81

Table 2. Correlation analysis between R_rs combination and SDD

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Band	R²	RMSE/sr^-1	MRE/%
400	0.84	0.000 42	22.41
412	0.83	0.000 54	24.87
442	0.82	0.000 75	28.16
490	0.77	0.001 29	25.02
510	0.74	0.001 51	27.07
560	0.68	0.001 88	21.78
620	0.90	0.000 54	35.73
665	0.86	0.000 40	37.97
674	0.89	0.000 34	24.86
681	0.89	0.000 32	21.47

Table 3. Atmospheric correction results for each band

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模型类型	模型公式	MRE/%
单波段模型	lgSD=-47.80R_rs(682)+0.515 8	0.66	0.594	25.37
	lgSD=-47.59R_rs(674)+0.513 6	0.67	0.585	24.74
	lgSD=-47.27R_rs(665)+0.515 6	0.66	0.564	23.18
	lgSD=-48.62R_rs(620)+0.588 8	0.68	0.464	19.92
	lgSD=-45.75R_rs(560)+0.799 5	0.57	0.501	20.54
	lgSD=-56.08R_rs(510)+0.781 1	0.20	0.750	31.33
	lgSD=1 309R_rs(682)²-87.75R_rs(682)+0.629 4	0.71	0.566	25.43
	lgSD=1 248R_rs(674)²-85.36R_rs(674)+0.620 2	0.73	0.541	23.97
	lgSD=1 163R_rs(665)²-82.32R_rs(665)+0.614 8	0.74	0.498	22.08
	lgSD=926.8R_rs(620)²-75.41R_rs(620)+0.681 6	0.72	0.401	19.35
	lgSD=512R_rs(560)²-60.89R_rs(560)+0.890 6	0.62	0.508	20.55
	lgSD=-1 089R_rs(510)²-28.7R_rs(510)+0.647 6	0.20	0.708	27.91
波段比值模型	lgSD=0.2568R_rs(510)/R_rs(620)-0.186 3	0.56	0.519	18.68
	lgSD=0.175 8R_rs(510)/R_rs(665)-0.193 7	0.55	0.837	26.61
	lgSD=0.173 8R_rs(510)/R_rs(674)-0.192 1	0.54	1.125	36.10
	lgSD=0.163 6R_rs(510)/R_rs(682)-0.165 4	0.52	1.128	36.31
	lgSD=0.313 6R_rs(561)/R_rs(620)-0.444 5	0.45	0.662	20.54
	lgSD=0.213 2R_rs(560)/R_rs(665)-0.442 3	0.46	0.639	23.45
	lgSD=0.212 1R_rs(560)/R_rs(674)-0.439 8	0.44	0.900	30.64
	lgSD=0.195 7R_rs(560)/R_rs(682)-0.377	0.42	0.963	32.43
	lgSD=-0.061 78R_rs(510)/R_rs(620)²+0.56R_rs(510)/R_rs(620)-0.500 3	0.55	0.651	24.18
	lgSD=-0.049 37R_rs(510)/R_rs(665)²+0.532 7R_rs(510)/R_rs(665)-0.73	0.52	1.283	47.86
	lgSD=-0.024 12R_rs(510)/R_rs(674)²+0.358 1R_rs(510)/R_rs(674)-0.477 6	0.54	1.420	50.95
	lgSD=-0.035 93R_rs(510)/R_rs(682)²+0.438 2R_rs(510)/R_rs(682)-0.591 1	0.50	1.551	58.93
	lgSD=-0.138 2R_rs(560)/R_rs(620)²+1.073R_rs(560)/R_rs(620)-1.397	0.45	0.640	26.71
	lgSD=-0.057 22R_rs(560)/R_rs(665)²+0.649 4R_rs(560)/R_rs(665)-1.177	0.45	0.919	34.01
	lgSD=-0.062 09R_rs(560)/R_rs(674)²+0.686 3R_rs(560)/R_rs(674)-1.244	0.43	1.196	45.47
	lgSD=-0.061 01R_rs(560)/R_rs(682)²+0.673 7R_rs(560)/R_rs(682)-1.202	0.41	1.336	51.66
混合波段模型	lgSD=0.083 14-33.89R_rs(620)+0.172 7R_rs(560)/R_rs(620)	0.62	0.478	16.94
	lgSD=0.2443-38.86R_rs(620)+0.142 6R_rs(510)/R_rs(620)	0.67	0.459	18.96
	lgSD=-0.010 96-19.57R_rs(560)+0.221 4R_rs(560)/R_rs(620)	0.68	0.483	15.93
	lgSD=0.212-23.29R_rs(560)+0.179 8R_rs(510)/R_rs(620)	0.65	0.425	17.73

Table 4. Validation results of empirical transparency model

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站位号	实测透明度/m	反演透明度/m	RMSE/m	MRE/%
1	3.0	3.02	0.13	4.50
2	4.0	3.00	1.07	26.86
3	2.0	2.02	0.53	26.42
4	2.0	2.12	0.55	27.73
5	2.5	1.90	0.06	2.41
6	1.8	2.13	0.69	38.80
7	1.2	1.38	0.97	80.86
8	1.8	1.61	0.53	29.58
9	1.8	1.28	0.19	10.65
10	2.2	1.60	0.13	5.86
合计			0.483	15.93

Table 5. The result between SDD estimated and in situ SDD

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