Global Change Effects on the Distribution of Nutrient in the Ecs, Nw Pacific and Kuroshio Seas: a Coupled Tidal-Biogeochemical Model

瀏覽統計 Email 通知 RSS Feed

簡歷

基本資料

Project title

Code/計畫編號

MOST106-2611-M019-002

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(Ⅱ)-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=12237912

Year

2017

Start date/計畫起

01-08-2017

Expected Completion/計畫迄

31-07-2018

Bugetid/研究經費

453千元

ResearchField/研究領域

海洋科學

"在研究東海水文發現在 1998、2006、2010 以及2012 年的夏季鹽度分佈中觀測到長江淡水水舌呈現異常轉向南東海擴散並延伸到台灣北部海域；即長江淡水形成一股轉向南流的水舌，與正常年向東北流動或與之前的數值模擬結果有極大差異。自1996 至 2005 年長江夏季平均流量約為52500 m3/s，而年平均流量約為29800 m3/s。為了探討長江淡水水舌異常轉向南東海擴散，於是將模式中的夏季長江流量增加為原來的3 倍來做為數值模式模擬的基礎。在這樣的基礎上吾人試著用不同強度與不同風向來進行模擬，結果顯示夏季時吹西南西風且風速約5.3 m/s 時，模式結果顯示長江水舌呈現向南擴散現象，這結果與2010 年海研一號932 之東海航次探測結果極為相似。但在相同風向若風速增強到10 m/s 時，長江淡水水舌將會在其前緣偏東南東方向，直接跨越黑潮進入西太平洋並不會往南東海擴散。""To study the hydrographic data of the East China Sea (ECS), the low-salinity water of the Changjiang plume abnormally turning and flowing towards the south ECS was observed and extended to the north of Taiwan in 1998, 2006, 2010, and 2012 summer. That is, the Changjiang Diluted water to form a flowing southward plume, and the normal plume to the northeast or with the previous numerical model results are very different. The average discharge of the Changjiang River in summer is about 52500 m3/s, and the annual average discharge is about 29800 m3/s. In order to investigate the disposal of the Changjiang River plume turning towards the southern ECS, the summer discharge of the Changjinag River in the numerical model is increased to 3 times of original discharge as the base of the numerical model simulation. Based on the condition, we try to simulate with different wind speed and directions. The modeled results show that the Changjiang River plume disperses to the south when the wind speed is about 5.3 m/s in summer. The results are very similar to that of R/V OR1 cruise-932 survey in 2010. However, the Changjiang Diluted water will disperse towards to the east-southeast when the wind speed increases to 10 m/s with the same direction, crossing the Kuroshio directly into the western Pacific Ocean and not diffusing to the south of the ECS."

DSpace CRIS

Global Change Effects on the Distribution of Nutrient in the Ecs, Nw Pacific and Kuroshio Seas: a Coupled Tidal-Biogeochemical Model

基本資料

Description