Impact of Nonlinear Eddies on Kuroshio (II)-1

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基本資料

Project title

Code/計畫編號

NSC102-2611-M019-011

Translated Name/計畫中文名

黑潮通量及其變化之觀測-子計畫：非線性渦漩對黑潮的衝擊(II)-1

Project Coordinator/計畫主持人

Yao-Tsai Lo

Funding Organization/主管機關

National Science and Technology Council

Co-Investigator(s)/共同執行人

何宗儒

Department/Unit

Department of Marine Environmental Informatics

Website

https://www.grb.gov.tw/search/planDetail?id=3105991

Year

2013

Start date/計畫起

01-08-2013

Expected Completion/計畫迄

01-07-2014

Co-Investigator(s)

Chung-Ru Ho

Bugetid/研究經費

1670千元

ResearchField/研究領域

海洋科學

"黑潮(Kuroshio)是北太平洋的西岸邊界流，由南往北流經臺灣東部海域，是台灣周遭海域重要的海流。臺灣位處於西太平洋渦漩豐富區，這些受到流場不穩定作用而產生的非線性渦漩，挾帶者龐大的動能，向西傳遞至臺灣東岸及呂宋海峽。呂宋海峽是西太平洋水團進入南海的重要通道，也是流經臺灣東側黑潮的上游區，非線性渦漩在此區域與黑潮的交互作用，對臺灣東側的黑潮及南海流場的影響相對重要。因此本計畫擬利用衛星遙測資料，配合在臺灣東部海域的實測數據，利用統計分析及動力解析方法，研究非線性渦漩與黑潮在呂宋海峽的交互作用，以了解渦漩對黑潮入侵南海路徑及其對黑潮下游流量之影響。原先的第一年計畫已蒐集衛星遙測及船測資料，也已開發渦漩偵測演算法及自動化渦漩偵測軟體，並利用此演算法探討西北太平渦漩的特性。此新提的第一年計畫將針對呂宋海峽進一步統計分析渦漩特性，並藉此追蹤渦漩的來源，了解其生成機制與過程；此外也將持續進行現場觀測。第二年將結合現場觀測資料，深入探討非線性渦漩對黑潮路徑及其下游區流量的影響並了解其動力過程。本研究所得結果將配合其他子計畫研究的結果相互驗證。" "The Kuroshio is the western boundary current of the North Pacific. It flows in the ocean off eastern Taiwan from south to north and is an important current around Taiwan. Besides, Taiwan is located at an eddy-rich area. These nonlinear eddies caused by the instability of currents bring a huge amount of energy propagating westward to east of Taiwan and the Luzon Strait to interact with the Kuroshio. It is worthy to understand the impact of these eddies on the Kuroshio near the Luzon Strait because they may affect the transport and the path of Kuroshio, as well as the current field of the South China Sea. To clarify the influence of nonlinear eddies on the Kuroshio, the satellite remotely-sensed data combining with in-situ measurements will be used. The statistical and dynamical analyses will be employed. We have collected remotely-sensed and in-situ measurements during the first year of original project. The algorithm to identify an eddy, and software of automatic detecting eddy based on the algorithm have also been developed. With this new two-year proposal, in the first year we will focus on collecting satellite altimetry data and radiometry data, and developing algorithms to identify an eddy. Using this eddy-detecting algorithm, we have studied the characteristics of eddies in the north Pacific. In addition, we also deployed current meters with other sub-projects to measure the transport of Kuroshio off east Taiwan. The main point of the first-year work of the new project, we will perform the statistical analysis on eddies near the eastern Luzon Strait to understand the characteristics and origins of those eddies. The in-situ measurements are still underway. For the second-year work, the dynamic analysis will be done with combination of satellite data and in-situ measurements to further understand variations of the downstream of Kuroshio path and transport in the ocean off east Taiwan. All results from this study will be used to compare with those from other sub-projects."

DSpace CRIS

Impact of Nonlinear Eddies on Kuroshio (II)-1

基本資料

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