Studying the light field of sea water is important in Ocean Color Remote Sensing (OCRS) because it brings immense
information concerning the ocean environmental properties. This magnitude of the Apparent Optical Properties (AOPs)
emerges from the sea-surface after incidence light energy has been absorbed and scattered by sea water constituents. In
this process, the amount of scattering is a lot smaller than that of absorption relatively. So the understanding of Inherent
Optical Properties (IOPs), especially absorption, is very important in OCRS. Many studies have been accomplished in
various seas around the world. In optically more complex waters around Korea, we have found only a few investigations
on the IOP and AOP. Thus, in this study we analyze the absorption coefficient of sea water constituents, phytoplankton,
Suspended Sediment (SS) and Dissolved Organic Matter (DOM) for the IOPs and the remote sensing reflectance for the
AOPs. About 1300 water samples have been collected in the Korean waters from 1998 to 2010. It should be noted that
sea areas around the Korea have different characteristics separately. So we analyzed the optical properties of each
separated sea waters and compared each other results. The absorption spectral shape of SS and DOM showed
exponentially decreasing pattern. Each graph's slope includes information of absorption characteristics. Using this
results, in the future, we will prompt to develop the ocean environmental algorithms for ocean color satellite images,
especially GOCI (Geostationary Ocean Color Imager) which will be launched on June 2010, around the Korean ocean.
In the Saemangeum coastal area as a study area, the tidal dyke of 33 km-long has been constructed for over 10 years.
This large scale of coastal engineering work has influenced the environment around the Saemangeum tide embankment.
Especially the construction has induced in the changes of ocean circulation system, so that the re-suspension and
movement of the Suspended Sediments (SS) were changed. The Suspended Sediments Concentration (SSC) is an
important factor for understanding of the Saemangeum oceanic environmental change because SSC directly affect to the
primary production by phytoplankton in the ocean. Accordingly we investigated and monitored the SS and chlorophyll
concentration change using time-series multi-sensor satellite data. We used Landsat TM/ETM+ for the SS and
chlorophyll monitoring respectively. As a result, it was found that the northern sea area of Gogunsan Islands had
significantly become clear after the completion of 4th embankment in the end of 2003 whereas the southern sea area was
getting a high amount of incoming flux of SS through 2 dyke gates that were still under construction. Chlorophyll
concentration around the 4th embankment showed an increasing pattern after dyke construction.
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