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Optimization of a Semi-analytical Ocean Color Algorithm for Optically-Complex (Case II) Waters

Optimization of a Semi-analytical Ocean Color Algorithm for Optically-Complex (Case II) Waters. Tihomir Kostadinov 11.03.2003 15:17 Geog 200B, Dr. Clarke UCSB. Structure of Talk. Introduction to Ocean Color Remote Sensing What are Case II waters? Why we care

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Optimization of a Semi-analytical Ocean Color Algorithm for Optically-Complex (Case II) Waters

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  1. Optimization of a Semi-analytical Ocean Color Algorithm for Optically-Complex (Case II)Waters Tihomir Kostadinov 11.03.2003 15:17 Geog 200B, Dr. Clarke UCSB

  2. Structure of Talk • Introduction to Ocean Color Remote Sensing • What are Case II waters? • Why we care • The GSM Semi-Analytical Algorithm • Local Tuning

  3. What is Ocean Color? http://www.gamonline.com/catalog/colortheory/spectrum.gif

  4. SeaWiFS Daily Coverage http://seawifs.gsfc.nasa.gov/SEAWIFS/SEASTAR/seawifs_daily_coverage.mpeg

  5. What are Case II Ocean Waters? • Based on the relative contribution of each of three • components to an optical property, for example a(440nm). • This criterion is wavelength dependent. • Excludes pure water contribution in classification. • Bottom effect can have influence in optically shallow waters.

  6. Why do we care?

  7. Toole and Siegel 2001 • 1996-1999 (N = 251) • Outliers indicate Sediments • Mean and Std curves are not similar in shape, therefore • Constituents’ concentrations vary independently.

  8. The GSM Semi-Analytical Model

  9. The GSM Semi-Analytical Model

  10. Local Tuning

  11. Acknowledgements & References • NASA • UCSB • Dr. David Siegel, ICESS, UCSB • Gordon, H. R., O. B. Brown, R. H. Evans, J. W. Brown, R. C. Smith, K. S. Baker, and D. K. Clark, “A semianalytic radiance model of ocean color,” J. Geophys. Res. 93 D9, 10909–10924. 1988. • Maritorena, S., D. Siegel, A. Peterson. "Optimization of a semi-analytical ocean color model for global-scale applications,” Applied Optics 41.15 (2002): 2705-2714. • "Remote Sensing of Ocean Colour in Coastal and Other Optically-Complex Waters." Reports of the International Ocean-Colour Coordinating Group Ed. Sathyendranath, Shubha 2000. • Toole, Dierdre A. and Siegel, David A. . "Modes and mechanisms of ocean color variability in the Santa Barbara Channel." Journal of Geophysical Research 160.C11 (2001): 26985-27000.

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