Decadal changes in East China Sea and Southern Yellow Sea ecosystem

Title
Decadal changes in East China Sea and Southern Yellow Sea ecosystem
Author(s)
Kong Christina Eunjin; 유신재; 장찬주
KIOST Author(s)
Jang, Chan Joo(장찬주)
Publication Year
2018-09-18
Abstract
The Three Gorges Dam on the Changjiang river discharge (CRD) is the largest hydropower project in the world, implemented in June 2003. Many researchers were concerned with the potential impact of the TGD on the marine ecosystem. Gong et al. (2003), for example, argued that this massive dam may cause reduction in marine primary productivity in the East China Sea by changing the supply of nutrients and sediment loading in the area. In this study, we examined the long-term trend of marine primary productivity (PP), chlorophyll-a (CHL), photosynthetically active radiation (PAR), sea surface temperature (SST) and euphotic depth (Zeu) in the East China Sea and Southern part of Yellow Sea during last 15-years (1998-2012). We also examined the correlation between the anomalies of Changjiang River discharge (CRD) and chlorophyll during pre-TGD (1998-2002) and
post-TGD (2003-2007) to understand the sensitivity of the change and some potential cause of the trend in the primary productivity. Our result showed that the geographic extent of CRD influence was indeed greatly reduced after 2003. However, the large scale variability of the primary productivity did not show any correlation with the operation of the TGD nor show clear temporal trend in the ECS. Therefore, we conclude that the TGD has not reduced the primary productivity of the East China Sea as a whole. (2003), for example, argued that this massive dam may cause reduction in marine primary productivity in the East China Sea by changing the supply of nutrients and sediment loading in the area. In this study, we examined the long-term trend of marine primary productivity (PP), chlorophyll-a (CHL), photosynthetically active radiation (PAR), sea surface temperature (SST) and euphotic depth (Zeu) in the East China Sea and Southern part of Yellow Sea during last 15-years (1998-2012). We also examined the correlation between the anomalies of Changjiang River discharge (CRD) and chlorophyll during pre-TGD (1998-2002) and
post-TGD (2003-2007) to understand the sensitivity of the change and some potential cause of the trend in the primary productivity. Our result showed that the geographic extent of CRD influence was indeed greatly reduced after 2003. However, the large scale variability of the primary productivity did not show any correlation with the operation of the TGD nor show clear temporal trend in the ECS. Therefore, we conclude that the TGD has not reduced the primary productivity of the East China Sea as a whole.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/23122
Bibliographic Citation
The 8th China-Japan-Korea IMBeR Symposium and Training Couse, pp.29, 2018
Publisher
CJK IMBeR
Type
Conference
Language
English
Publisher
CJK IMBeR
Related Researcher
Research Interests

upper ocean dynamics,regional climate modeling,ocean climate change,해양상층역학,지역기후모델링,해양기후변화

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