한반도 서남부 해역에서의 해양 입자들에 대한 광학적 특성 연구

Abstract

Studying the upwelling light field is important in Ocean Color Remote Sensing (OCRS) because it brings immense information concerning the ocean environmental properties. This quantity 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 (IOP), 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. Thus, in this study we analyze the absorption coefficient of sea water constituents such as phytoplankton, Suspended Sediment (SS) and Dissolved Organic Matter (DOM). For this study 107 water samples were collected in the Southwest Sea of Korea during 2001 to 2005. Phytoplankton exhibited pronounced absorption features at 440nm, 465nm and 675nm. Some cases had the absorption features at 550 nm. Absorption coefficient values of phytoplankton at 443nm are appeared ranged of 0.02 to 0.11 m-1. That result is little lower than other sea waters comparatively. The absorption spectral shape of SS and DOM showed exponentially decreasing pattern. Each graph’s slope includes information of absorption characteristics. Our result shows that slope of SS is 0.065nm-1 and that of DOM is 0.013nm-1. The results were also compared with those from other sea waters. Our future study will concentrate on application of these results to inverse-forward ocean optical models.