Numerical investigation on the ecological influence of Changjiang Diluted Water to the Yellow Sea

Title
Numerical investigation on the ecological influence of Changjiang Diluted Water to the Yellow Sea
Author(s)
김한나; 강현우; 소재귀; 정경태; 김미경; Momme Butenschon; Icarus Allen
KIOST Author(s)
Kang, Hyoun-Woo(강현우)So, Jae Kwi(소재귀)
Publication Year
2014-05-09
Abstract
Considerable attention has been recently paid to the eutrophication in relation to changes in the ecosystem of the East China Sea. The inflowing nutrients from the Changjiang River are characterized by high concentration and lofty N/P ratio. The eutrophication occurs frequently in the vicinity of the Changjiang River mouth. The distribution of the Changjiang Diluted Water(CDW), characterized as water with relatively low salinity (< 30~32) in general, have seasonal variation with change in flow patterns(southward along the coastline of China in winter while the northeastward heading for Cheju Island in summer). In this study, the effect of the CDW on the lower trophic ecosystem of the central Yellow Sea has been investigated based on the POLCOMS-ERSEM coupled physico-biogeochemical ecosystem model.The physical and biogeochemical borderlines of the CDW are defined by the distribution of the salinity and nitrate concentration at the surface. The extension region of both CDW borderlines has maximum in August and the borderlines don’t reach to the center of the Yellow Sea and usually propagate toward the Korea Strait. The variation of the lower trophic ecosystem of the Changjiang Estuary located inside the CDW and the center of YS has been compared. The nutrients have mostly high concentration in winter due to vertical mixing derived by strong wind while the nitrate in the Changjiang Estuary shows high concentration in. The eutrophication occurs frequently in the vicinity of the Changjiang River mouth. The distribution of the Changjiang Diluted Water(CDW), characterized as water with relatively low salinity (< 30~32) in general, have seasonal variation with change in flow patterns(southward along the coastline of China in winter while the northeastward heading for Cheju Island in summer). In this study, the effect of the CDW on the lower trophic ecosystem of the central Yellow Sea has been investigated based on the POLCOMS-ERSEM coupled physico-biogeochemical ecosystem model.The physical and biogeochemical borderlines of the CDW are defined by the distribution of the salinity and nitrate concentration at the surface. The extension region of both CDW borderlines has maximum in August and the borderlines don’t reach to the center of the Yellow Sea and usually propagate toward the Korea Strait. The variation of the lower trophic ecosystem of the Changjiang Estuary located inside the CDW and the center of YS has been compared. The nutrients have mostly high concentration in winter due to vertical mixing derived by strong wind while the nitrate in the Changjiang Estuary shows high concentration in
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/26285
Bibliographic Citation
3rd China-Korea workshop on oceanic monitoring and development of prediction system of radionuclides for nuclear safety, pp.22, 2014
Publisher
KIOST
Type
Conference
Language
English
Publisher
KIOST
Related Researcher
Research Interests

Marine System Modeling,Ocean Climate,Ocean Circulation,해양시스템모델링,해양 기후,해양 순환

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