The ocean algorithm aerosol models were derived mainly from data gleaned from sun/sky photometers and from analysis of errors in the products from previous versions of the MODIS algorithm. In the C6 ocean algorithm there are four fine modes and five coarse modes. Their properties are described in the following tables.
Table 1: Refractive Indices, Number Median, Standard Deviation and Effective Radius for the aerosol modes used in the MODIS Lookup Table for the ocean algorithm. Models 1-4 are fine modes and Models 5-9 are coarse modes.
|
F |
λ=0.466-->0.857 µm |
λ=1.241 µm |
λ =1.628 µm |
λ =2.113 µm |
rg |
σ |
reff |
Comments |
|
1 |
1.45-0.0035i |
1.45-0.0035i |
1.43-0.01i |
1.40-0.005i |
0.07 |
0.40 |
0.10 |
Water Soluble |
|
2 |
1.45-0.0035i |
1.45-0.0035i |
1.43-0.01i |
1.40-0.005i |
0.06 |
0.60 |
0.15 |
Water Soluble |
|
3 |
1.40-0.0020i |
1.40-0.0020i |
1.39-0.005i |
1.36-0.003i |
0.08 |
0.60 |
0.20 |
Water Soluble with humidity |
|
4 |
1.40-0.0020i |
1.40-0.0020i |
1.39-0.005i |
1.36-0.003i |
0.10 |
0.60 |
0.25 |
Water Soluble with humidity |
|
C |
λ=0.466-->0.857 µm |
λ=1.241 µm |
λ =1.628 µm |
λ =2.113 µm |
rg |
σ |
reff |
Comments |
|
5 |
1.35-0.001i |
1.35-0.001i |
1.35-0.001i |
1.35-0.001i |
0.40 |
0.60 |
0.98 |
Wet sea salt type |
|
6 |
1.35-0.001i |
1.35-0.001i |
1.35-0.001i |
1.35-0.001i |
0.60 |
0.60 |
1.48 |
Wet sea salt type |
|
7 |
1.35-0.001i |
1.35-0.001i |
1.35-0.001i |
1.35-0.001i |
0.80 |
0.60 |
1.98 |
Wet sea salt type |
|
8 |
1.53-0.003i (0.47) 1.53-0.001i (0.55) 1.53-0.000i (0.65) 1.53-0.000i (0.86) |
1.46-0.000i |
1.46-0.001i |
1.46-0.000i |
0.60 |
0.60 |
1.48 |
Dust-like type
|
|
9 |
1.53-0.003i (0.47) 1.53-0.001i (0.55) 1.53-0.000i (0.65) 1.53-0.000i (0.86) |
1.46-0.000i |
1.46-0.001i |
1.46-0.000i |
0.50 |
0.80 |
2.50 |
Dust-like type
|
Table 2: Spectral Extinction Coefficients for the aerosol modes used in the MODIS Lookup Table for the ocean algorithm. Models 1-4 are fine modes and Models 5-9 are coarse modes.
|
λ (µm) / Mode |
0.466 |
0.554 |
0.645 |
0.857 |
1.241 |
1.628 |
2.113 |
|
1 |
1.43E-10 |
9.33E-11 |
6.15E-11 |
2.66E-11 |
7.91E-12 |
4.30E-12 |
1.48E-12 |
|
2 |
3.03E-10 |
2.33E-10 |
1.78E-10 |
9.95E-11 |
3.93E-11 |
1.88E-11 |
6.99E-12 |
|
3 |
6.78E-10 |
5.45E-10 |
4.34E-10 |
2.63E-10 |
1.15E-10 |
5.67E-11 |
2.28E-11 |
|
4 |
1.33E-09 |
1.12E-09 |
9.36E-10 |
6.15E-10 |
3.01E-10 |
1.57E-10 |
6.68E-11 |
|
5 |
2.69E-08 |
2.78E-08 |
2.84E-08 |
2.85E-08 |
2.55E-08 |
2.12E-08 |
1.63E-08 |
|
6 |
5.57E-08 |
5.76E-08 |
5.95E-08 |
6.29E-08 |
6.44E-08 |
6.09E-08 |
5.33E-08 |
|
7 |
9.50E-08 |
9.72E-08 |
9.97E-08 |
1.06E-07 |
1.13E-07 |
1.15E-07 |
1.09E-07 |
|
8 |
5.57E-08 |
9.72E-08 |
5.70E-08 |
6.05E-08 |
6.60E-08 |
6.63E-08 |
6.26E-08 |
|
9 |
6.42E-08 |
6.54E-08 |
6.66E-08 |
6.92E-08 |
7.31E-08 |
7.43E-08 |
7.36E-08 |
Table 3: Spectral Single Scattering Albedos for the aerosol modes used in the MODIS Lookup Table for the ocean algorithm. Models 1-4 are fine modes and Models 5-9 are coarse modes.
|
λ (µm) / Mode |
0.466 |
0.554 |
0.645 |
0.857 |
1.241 |
1.628 |
2.113 |
|
1 |
0.974 |
0.968 |
0.961 |
0.94 |
0.879 |
0.541 |
0.499 |
|
2 |
0.978 |
0.977 |
0.976 |
0.97 |
0.956 |
0.817 |
0.822 |
|
3 |
0.987 |
0.986 |
0.986 |
0.984 |
0.978 |
0.921 |
0.916 |
|
4 |
0.986 |
0.987 |
0.987 |
0.985 |
0.982 |
0.94 |
0.941 |
|
5 |
0.978 |
0.982 |
0.985 |
0.989 |
0.991 |
0.992 |
0.993 |
|
6 |
0.966 |
0.972 |
0.976 |
0.983 |
0.988 |
0.991 |
0.992 |
|
7 |
0.955 |
0.962 |
0.9673 |
0.976 |
0.984 |
0.988 |
0.99 |
|
8 |
0.901 |
0.967 |
1 |
1 |
1 |
0.983 |
1 |
|
9 |
0.867 |
0.953 |
1 |
1 |
1 |
0.9835 |
1 |
Table 4: Spectral Asymmetry Parameters for the aerosol modes used in the MODIS Lookup Table for the ocean algorithm.
Models 1-4 are fine modes and Models 5-9 are coarse modes.
|
λ (µm) / Mode |
0.466 |
0.554 |
0.645 |
0.857 |
1.241 |
1.628 |
2.113 |
|
1 |
0.576 |
0.511 |
0.447 |
0.322 |
0.178 |
0.105 |
0.063 |
|
2 |
0.683 |
0.660 |
0.635 |
0.575 |
0.468 |
0.369 |
0.265 |
|
3 |
0.735 |
0.718 |
0.699 |
0.651 |
0.559 |
0.472 |
0.372 |
|
4 |
0.751 |
0.740 |
0.726 |
0.690 |
0.618 |
0.546 |
0.458 |
|
5 |
0.785 |
0.786 |
0.789 |
0.794 |
0.795 |
0.787 |
0.769 |
|
6 |
0.795 |
0.788 |
0.786 |
0.787 |
0.794 |
0.796 |
0.792 |
|
7 |
0.810 |
0.800 |
0.793 |
0.786 |
0.788 |
0.794 |
0.796 |
|
8 |
0.753 |
0.72 |
0.697 |
0.679 |
0.713 |
0.72 |
0.719 |
|
9 |
0.780 |
0.746 |
0.723 |
0.706 |
0.722 |
0.722 |
0.715 |