Remote-sensing technique for determination of the volume absorption coefficient of turbid water

Michael Sydor; Robert A. Arnone; Richard W. Gould; Gregory E. Terrie; Sherwin D. Ladner; Christopher G. Wood

doi:10.1364/AO.37.004944

Applied Optics
Vol. 37,
Issue 21,
pp. 4944-4950
(1998)
•https://doi.org/10.1364/AO.37.004944

Remote-sensing technique for determination of the volume absorption coefficient of turbid water

Michael Sydor, Robert A. Arnone, Richard W. Gould, Gregory E. Terrie, Sherwin D. Ladner, and Christopher G. Wood

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Michael Sydor, Robert A. Arnone, Richard W. Gould, Gregory E. Terrie, Sherwin D. Ladner, and Christopher G. Wood, "Remote-sensing technique for determination of the volume absorption coefficient of turbid water," Appl. Opt. 37, 4944-4950 (1998)

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Abstract

We use remote-sensing reflectance from particulate R _rs to determine the volume absorption coefficient a of turbid water in the 400 < λ < 700-nm spectral region. The calculated and measured values of a(λ) show good agreement for 0.5 < a < 10 (m^-1). To determine R _rs from a particulate, we needed to make corrections for remote-sensing reflectance owing to surface roughness S _rs. We determined the average spectral distribution of S _rs from the difference in total remote-sensing reflectance measured with and without polarization. The spectral shape of S _rs showed an excellent fit to theoretical formulas for glare based on Rayleigh and aerosol scattering from the atmosphere.

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λ(nm)	Average a _AC9(m^-1)	Average a _Rrs(m^-1)	Δ_a(m^-1	σ
412	6.3	5.1	1.1	0.16
440	4.3	3.6	0.75	0.15
488	2.3	2.2	0.21	0.08
510	1.6	1.6	0.24	0.13
532	1.2	1.1	0.21	0.17
555	0.93	0.85	0.19	0.19
650	0.62	0.70	0.09	0.12
676	0.76	0.79	0.13	0.16
715	1.1	0.91	0.16	0.16

λ (nm)	Average a _AC9(m^-1)	Average a _Rrs(m^-1)	Δ_a(m^-1)	σ
412	4.3	3.7	0.58	0.16
440	3.0	2.8	0.25	0.10
488	1.6	1.8	0.28	0.16
510	1.2	1.3	0.26	0.18
532	0.80	1.0	0.22	0.21
555	0.62	0.78	0.18	0.23
650	0.60	0.67	0.14	0.20
676	0.79	0.80	0.16	0.20
715	0.90	0.91	0.16	0.18

λ (nm)	Average a _AC9 (m^-1)	Average a _Rrs (m^-1)	Δ_a (m^-1)	σ
412	0.62	0.52	0.15	0.24
440	0.52	0.43	0.09	0.20
488	0.34	0.30	0.04	0.17
510	0.29	0.26	0.03	0.18
532	0.25	0.23	0.03	0.17
555	0.23	0.22	0.03	0.20
650	0.44	0.41	0.05	0.14
676	0.52	0.51	0.05	0.12
715	0.90	1.1	0.19	0.15

Station	Average a _AC9 (m^-1)	Average a _Rrs (m^-1)	Δ_a (m^-1)	σ
1	1.2	1.1	0.10	0.08
2	1.3	1.2	0.14	0.09
3	1.4	1.5	0.22	0.23
4	2.1	2.0	0.24	0.09
5	3.6	3.2	0.52	0.16
6	4.3	3.2	1.2	0.25
7	0.94	0.86	0.11	0.11

Station	Average a _AC9 (m^-1)	Average a _Rrs (m^-1)	Δ_a (m^-1)	σ
1	1.2	0.98	0.19	0.22
2	1.1	1.1	0.09	0.09
3	1.1	0.82	0.22	0.19
4	1.3	1.3	0.17	0.14
5	1.9	1.9	0.16	0.10
6	1.9	2.4	0.48	0.30
7	2.1	2.2	0.41	0.21

Station	Average a _AC9 (m^-1)	Average a _Rrs (m^-1)	Δ_a (m^-1)	σ
1	0.49	0.50	0.07	0.21
2	0.61	0.6	0.05	0.04
3	0.80	0.72	0.13	0.19
4	0.71	0.72	0.08	0.12
5	0.60	0.59	0.08	0.13
6	0.52	0.56	0.07	0.15
7	0.54	0.55	0.07	0.10
8	0.71	0.71	0.08	0.09
9	0.81	0.80	0.11	0.13
10	0.55	0.52	0.15	0.30
11	0.52	0.52	0.12	0.34
12	0.48	0.50	0.13	0.28
13	0.57	0.56	0.10	0.28
14	0.74	0.78	0.07	0.10
15	1.1	1.1	0.14	0.12
16	0.53	0.55	0.10	0.19
17	0.49	0.51	0.14	0.23
18	0.59	0.62	0.07	0.09

Abstract

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Applied Optics