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| Titel |
An optical model for deriving the spectral particulate backscattering coefficients in oceanic waters |
| VerfasserIn |
S. P. Tiwari, P. Shanmugam |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 9, no. 6 ; Nr. 9, no. 6 (2013-11-21), S.987-1001 |
| Datensatznummer |
250085278
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| Publikation (Nr.) |
 copernicus.org/os-9-987-2013.pdf |
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| Zusammenfassung |
| An optical model is developed based on the diffuse attenuation coefficient
(Kd) to estimate particulate backscattering coefficients
bbp(λ) in oceanic waters. A large in situ data set is used
to establish robust relationships between bbp(530) and
bbp(555) and Kd(490) using an efficient nonlinear
least-square method which uses the trust region algorithm with Bisquare
weights scheme to adjust the coefficients. These relationships are obtained
with good correlation coefficients (R2 = 0.786 and 0.790), low root mean
square error (RMSE = 0.00076 and 0.00072) and 95% confidence bounds.
The new model is tested with three independent data sets: the NOMAD
SeaWiFS Match ups, OOXIX IOP algorithm workshop evaluation data set (Version
2.0w APLHA), and IOCCG simulated data set. Results show that the new model
makes good retrievals of bbp at all key wavelengths (from
412–683 nm), with statistically significant improvements over other
inversion models. Thus, the new model has the potential to improve our
present knowledge of particulate matter and their optical variability in
oceanic waters. |
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