Global Change Effects on the Distribution of Nutrient in the ECS, Nw Pacific and Kuroshio Seas (I): A Tidal-Biogeochemical Coupling Model

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Project title

Code/計畫編號

NSC102-2611-M019-015

Translated Name/計畫中文名

全球變遷對西北太平洋臺灣海域海洋生物地球化學與生態系統影響之長期觀測與研究,-子計畫：全球變遷因子對東海及西北太平洋黑潮海域營養鹽分布之影響：潮流生地化耦合模式

Project Coordinator/計畫主持人

Hung-Jen Lee

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Department of Marine Environmental Informatics

Website

https://www.grb.gov.tw/search/planDetail?id=3107833

Year

2013

Start date/計畫起

01-08-2013

Expected Completion/計畫迄

31-07-2014

Bugetid/研究經費

409千元

ResearchField/研究領域

海洋科學

"三海模式也曾經提供給生地化模式去研究東海的生態問題，經過與實測資料比較，物理模式結果顯示夏季時長江的水舌擴散分佈在長江口的東北方，但由實測資料顯示長江的水舌擴散分佈是時常往東或偶爾往南。模式結果顯示長江的水舌分佈較實測資料偏北，但模式加入潮汐之後長江的水舌擴散分佈偏南，這種情況與實測資料較符合。而長江的水舌擴散分佈偏南主要是受到潮汐餘流的驅動，在研究長江的水舌擴散時發現長江口南方的潮汐餘流顯示有季節性變化，理論上，冬、夏潮汐結構相同的情況下應該相同，但為何會顯示有季節性變化，這也是本研究的目的。""With climatological discharge rate, the Yangtze River plume disperses to the northeast in summer but follows the China Coastal Current (CCC) to the south in winter. And, the model also provides a base for developing the biogeochemical studies of the East China Sea. By comparison, the Yangtze River plume disperses to the northeast from its mouth in summer time, but the observations show that the plume range extends usually to the east or occasionally to the south. Conceivably, the plume position of the ECS model is prominent deflecting to the north than that of the observed data. Then, the Yangtze River plumes are deflecting to the south, when the tidal force is added to the model. The situation, the plumes deflecting to the south, is more corresponding to the observed data. Leading to the behavior of Yangtze River plumes being deflected to south, the tidal residual current is the major force. And we found that the tidal residual currents are to have the seasonal variations in the study. In theory, the same constituents of tidal force should have similar pattern in summer and winter, but they are so different. This is our concerned issue of the study."

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Global Change Effects on the Distribution of Nutrient in the ECS, Nw Pacific and Kuroshio Seas (I): A Tidal-Biogeochemical Coupling Model

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