[HTT15-P07] Evaluation and comparison of Karenia mikimotoi detection in the Seto-Inland Sea by remote sensing
Keywords:Seto-Inland Sea, Harmful Algae Blooms, Karenia mikimotoi, Remote Sensing
Harmful Algae Blooms (HABs) is a worldwide problem in coastal marine systems. Seto-Inland Sea is a semi-enclosed coastal area in Japan that suffered from HABs. Dinoflagellate Karenia mikimotoi is one of the most common species that form HABs in the Seto-Inland Sea. It could increase fish mortality, thereby causing economic losses for coastal aquaculture. A detection method based on the spectral difference in short wavelength was developed by limited field observation in the western part of the Seto-Inland Sea (Siswanto et al., 2013). But the spectra in the short wavelength are always influenced by colored dissolved organic matters and non-algal particles as well as the error of atmospheric correction. Thus, it is necessary to evaluate the method with more filed observation data. Meanwhile, several methods for the detection of Karenia brevis, a HABs species belongs to the same genus and has similar optical properties with Karenia mikimotoi, were developed in the West Florida Shelf. These methods could be divided into chlorophyll-a based, apparent optical property based, inherent optical property based approach, etc. This research aims to compare results of different detection methods in the Seto-Inland Sea and evaluate them with the recent filed observation data.