한국 주변해역에서의 부유퇴적물과 용존유기물질에 의한 광학적 특징의 비교 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 (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. Thus, in this study we analyze the absorption coefficient of sea water constituents, especially Suspended Sediment (SS) and Dissolved Organic Matter (DOM). For this study about 110 water samples were collected in the Korean waters during 2007. It should be noted that sea areas around the Korea have different characteristics separately. For instance, coastal areas of the Yellow Sea and South Sea are typically Case-II water areas and the East Sea and East China Sea have Case-I water characteristics. 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. Our result shows that the average values of slope for SS are 0.0072 nm-1 in the East Sea, 0.0076 nm-1 in the East China Sea, 0.0075 nm-1 in the Yellow Sea and 0.0053 nm-1 in the South Sea. The average values of slope for DOM in each cruise are 0.0089, 0.0086, 0.0118 and 0.0105 nm-1, respectively. Our future study will concentrate on application of these results to inverse-forward ocean optical models.