Table 2.
Average optical band ratios and spectral dependencies computed from the normalized spectral shape of each constituent or combination of constituents.
| P | N | M | O | ||
|---|---|---|---|---|---|
| a ph,n | 443/555 | 7.1 ± 1.0 (10) | 6.3 ± 2.2 (10) | 5.9 ± 1.7 (54) | 8.4 ± 2.8 (42) |
| 443/670 | 3.0 ± 0.2 | 2.7 ± 0.6 | 2.1 ± 0.6 | 2.8 ± 0.4 | |
| a ph+w,n | 443/555 | 0.21 ± 0.0 (10) | 0.37 ± 0.3 (10) | 0.72 ± 0.7 (54) | 0.35 ± 0.3 (42) |
| 443/670 | 3.0 ± 0.2 | 2.7 ± 0.6 | 2.1 ± 0.6 | 2.8 ± 0.4 | |
| a nap,n | 443/555 | 1.9 ± 0.1 (12) | 2.0 ± 0.1 (13) | 2.4 ± 0.4 (60) | 2.0 ± 0.3 (46) |
| 443/670 | 2.8 ± 0.3 | 3.1 ± 0.3 | 3.9 ± 0.9 | 3.1 ± 0.7 | |
| S nap | −0.006 ± 0.001 | −0.006 ± 0.000 | −0.008 ± 0.001 | −0.007 ± 0.001 | |
| a cdom,n | 443/555 | 11.0 ± 2.9 (7) | 8.2 ± 3.5 (11) | 6.9 ± 1.4 (61) | 9.6 ± 5.1 (45) |
| 443/670 | 142.0 ± 80.3 | 85.0 ± 97.2 | 51.0 ± 24.6 | 133.0 ± 192 | |
| S cdom | −0.020 ± 0.001 | −0.020 ± 0.000 | −0.018 ± 0.002 | −0.019 ± 0.002 | |
| b bp,n | 443/555 | 1.3 ± 0.2 (2) | 1.5 ± 0.4 (3) | 1.3 ± 0.1 (57) | 1.4 ± 0.2 (40) |
| 443/670 | 1.7 ± 1.8 | 2.2 ± 1.1 | 1.6 ± 0.2 | 1.8 ± 0.5 | |
| η bbp | −1.3 ± 0.6 | −1.7 ± 1.1 | −1.1 ± 0.3 | −1.4 ± 0.6 | |
| a n | 443/555 | 0.67 ± 0.05 (6) | 2.0 ± 0.7 (10) | 1.7 ± 0.7 (59) | 1.3 ± 0.8 (45) |
| 443/670 | 0.11 ± 0.01 | 0.78 ± 0.87 | 0.45 ± 0.47 | 0.42 ± 0.63 | |
| b b,n | 443/555 | 1.9 ± 0.2 (2) | 1.6 ± 0.3 (3) | 1.5 ± 0.2 (57) | 1.7 ± 0.4 (41) |
| 443/670 | 3.4 ± 0.5 | 2.5 ± 0.9 | 2.1 ± 0.5 | 2.8 ± 1.1 | |
| η bb | −2.9 ± 0.4 | −2.1 ± 0.9 | −1.7 ± 0.6 | −2.3 ± 0.9 | |
| (b b/a)n | 443/555 | 2.7 ± nd* (0) | 0.6 ± 0.2 (3) | 1.1 ± 0.5 (54) | 2.1 ± 1.4 (41) |
| 443/670 | 29.7 ± nd* (0) | 2.0 ± 1.6 (3) | 9.3 ± 6.6 (54) | 24.2 ± 21.5 (41) | |
| R rs,n | 443/555 | 2.9 ± 0 (1) | 0.4 ± 0.2 (3) | 1.1 ± 0.5 (46) | 1.8 ± 1.2 (36) |
| 443/670 | 29.5 ± 0 (1) | 1.4 ± 2.1 (3) | 10.3 ± 7.3 (46) | 19.1 ± 16.5 (36) |
For a nap and a cdom, the spectral slope parameter S (nm−1) of an exponential model fit to the data is provided. For b bp and b b, the dimensionless spectral slope parameter η of a fitted power law function to the data is listed. The values represent the mean and standard deviation of each cluster, with the number of samples in parentheses for the first band ratio.
For the P cluster, no single station included measurements of every constituent. A single value for the cluster was calculated by combining the cluster means of each constituent to estimate a mean b b/a spectrum, which was then normalized prior to calculating the band ratio.