| Summary: | 碩士 === 國立海洋大學 === 漁業科學學系 === 89 === ABSTRACT
Ocean color telemetering is mainly composed by telemetering the spectrum from the surface of the ocean and utilize the relation between modeled ocean color and phytoplankton pigment to analyze the distribution of pelagic plants in the ocean. Yet, if we want to utilize the spectrum data from Ocean color Satellite to analyze the distribution of pelagic plants and suspended matter, we need to establish the Bio-optical algorithms to calculate the pigments in the water accurately.
For this research, we had sailed 6 times from May to October in 1999 to carry out the optical property observation experiments in Taiwan Straits. (1)There are 3 kinds of water mass in Taiwan Straits and they are China coastal water. Kuroshio water and Shelf Mixing Water. (2)In this research, we use 16 ocean color algorithm from SeaBAM and 5 from CZCS.OCTS.POLDER.SeaWiFS satellites, totally 21 algorithms, to calculate the ocean color between phytoplankton pigment concentration and spectrum, then compare the errors within to confine the error area within 35% to fit the request of the ocean color telemetering. (3)Have 4 chlorophyll concentration substitute in to ocean color algorithm, the comparisons of r2 are as below: Depth-integral concentration gets the best value of r2 and is better than Arithmetic averaging concentration, also Arithmetic averaging concentration gets the better value of r2 than Surface concentration does and Optically-weighted concentration gets the lowest r2. Within 84 outcomes, CalCOF1 2-band cubic of Depth-integral concentration is the best mode. (4)We also use other statistics, such as mean devialion(MD), coefficient of variance (CV), residual mean square (rms), and bias, to catch on the situations between good and bad under different algorithms, and then find out that CalCOFI 2-band cubic ocean color algorithm is the best in the comprehensive comparisons. Therefore, we choose this algorithm as the satellite ocean color modle for this research. Its ocean color algorithm of chlorophyll concentration is [C]=10︿(0.0231-0.9138*R-1.0858*R2+0.4285*R3), R=Log(Rrs490/Rrs555).
Keyword: Concentration of chlorophyll a , Bio-optical algorithms, Underwater optical property , Taiwan Straits
|
|---|
