A study on the satellite-based sea surface salinity mapping in Korean coastal waters

Title
A study on the satellite-based sea surface salinity mapping in Korean coastal waters
Author(s)
최종국; 황득재; 유주형
KIOST Author(s)
Choi, Jong Kuk(최종국)Hwang, Deuk Jae(황득재)Ryu, Joo Hyung(유주형)
Publication Year
2018-09-24
Abstract
Sea surface salinity (SSS) is an important factor in the ocean science, such as estimating oceanic carbon flux, tracing red tide, and calculating other physical processes at the surface. Sea surface salinity can be derived from satellite remote sensing, although little has been successful particularly in the coastal waters. It is well-known that absorption property of colored dissolved organic matter (CDOM) absorption has a strong correlation with SSS in the area that influenced by freshwater inflow. Here, we tested the applicability of CDOM distribution observed from the Geostationary Ocean Colour Imager (GOCI) to mapping SSS in the Korean coastal waters. Empirical relationships between CDOM absorption and SSS are derived from in-situ measurement collected at the Gyeonggi-bay located in the middle of the west coast of Korean peninsula. SSS images derived from GOCI were validated by comparison with the in-situ measurement and were also compared with SSS images provided from HYCOM-modelled, which shows that it is possible to estimate SSS from CDOM absorption at the estuarine environment. Further studies would be needed to improve the algorithm and apply it to other coastal environments around the Korean peninsula. Satellite based SSS from this study can be used for studies on the long-term variations in SSS in this area and its relations with the climate changes.mote sensing, although little has been successful particularly in the coastal waters. It is well-known that absorption property of colored dissolved organic matter (CDOM) absorption has a strong correlation with SSS in the area that influenced by freshwater inflow. Here, we tested the applicability of CDOM distribution observed from the Geostationary Ocean Colour Imager (GOCI) to mapping SSS in the Korean coastal waters. Empirical relationships between CDOM absorption and SSS are derived from in-situ measurement collected at the Gyeonggi-bay located in the middle of the west coast of Korean peninsula. SSS images derived from GOCI were validated by comparison with the in-situ measurement and were also compared with SSS images provided from HYCOM-modelled, which shows that it is possible to estimate SSS from CDOM absorption at the estuarine environment. Further studies would be needed to improve the algorithm and apply it to other coastal environments around the Korean peninsula. Satellite based SSS from this study can be used for studies on the long-term variations in SSS in this area and its relations with the climate changes.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/23115
Bibliographic Citation
ASIA-PACIFIC Remote Sensing, pp.1, 2018
Publisher
SPIE
Type
Conference
Language
English
Publisher
SPIE
Related Researcher
Research Interests

Coastal Remote Sensing,RS based Marine Surveillance System,GOCI Series Operation,연안 원격탐사,원격탐사기반 해양감시,천리안해양관측위성 운영

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