한국 남해 동부 연안 해역에서 홍수기와 갈수기 동안 수질환경 특성과 변동 KCI OTHER

Title
한국 남해 동부 연안 해역에서 홍수기와 갈수기 동안 수질환경 특성과 변동
Alternative Title
Variations and Characters of Water Quality during Flood and Dry Seasons in the Eastern Coast of South Sea, Korea
Author(s)
정도현; 신현호; 정승원; 임동일
KIOST Author(s)
Jeong, Do Hyun(정도현)Shin, Hyeon Ho(신현호)Jung, Seung Won(정승원)Lim, Dhongil(임동일)
Publication Year
2013-03
Abstract
Physiochemical characters of sea waters during summer flood- and winter dry-seasons and their spatial variations were investigated along the coastal area off the eastern South Sea, Korea. Using the hierarchical clustering method, in this study, we present comprehensive analyses of coastal waters masses and their seasonal variations. The results revealed that the coastal water of the study area was classified into six water masses (A to F). During summer season, the surface water was mainly occupied by the coastal pseudo-estuarine water (water mass B) with low salinity and high nutrients and the river-dominated coastal water (water mass C) with low nutrients, respectively. The bottom water was dominated by cold water (water mass D) with very low temperature, high salinity and high nutrients, compared to masses of surface water. Notably, the water mass B, with high concentrations of nutrients (silicate and nitrogen) and low salinity, which is strongly controlled by the water quality of river freshwater, seems to play an important role in controlling the water quality and further regulating physical processes on ecosystem in the eastern coastal area of South Sea. The water mass D (bottom cold water) coupled with a strong thermocline, which exists in near-bottom layer along the western margin of Korea Strait, has a low temperature, pH and DO, but abundant nutrients. This water mass disappears in winter owing to strong vertical mixing, and subsequently may act as a pool for nutrients during winter dry-season. On the other hand, vertically well-mixed water column during the winter season was typically occupied by the Tsushima (water mass E) and the coastal water (water mass F) with a development of coastal front formed in a transition zone between them. These winter water masses were characterized by low nutrient concentration and balance in N/P ratio, compared with summer season with high nutrient concentrations and strong N-limitation. Accordingly, the analysis of water masses will help one to better chemical and biological processes in coastal area. In most of the study area, characteristically, the growth of phytoplankton community is limited by nitrogen, which is clearly different with coastal environment of West Sea of Korea, with a relative lack of phosphorus. It showed the western and the southern coasts in Korea are substantially different from each other in environmental and ecological characteristics.
ISSN
1226-9999
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/1692
Bibliographic Citation
환경생물, v.31, no.1, pp.19 - 36, 2013
Publisher
한국환경생물학회
Keywords
physiochemical properties; seasonal variations; water masses; limiting nutrients; Korean coasts
Type
Article
Language
Korean
Publisher
한국환경생물학회
Related Researcher
Research Interests

Marine environmental engineering,Marine Geochemistry,Environmental Analysis,해양환경공학,해양지화학,환경분석학

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