Quantifying, Predicting, and Exploiting Uncertainty (QPE) Induced by Deep Scattering Layer in the Northeastern Waters of Taiwan (III)

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Project title

Code/計畫編號

NSC99-2623-E019-001-D

Translated Name/計畫中文名

台灣周邊海域(東北)水下偵測整合計畫---子計畫五：深海散漫層對水下偵測效能之誤差分析(III)

Project Coordinator/計畫主持人

Ming-An Lee

Funding Organization/主管機關

National Science and Technology Center for Disaster Reduction

Department/Unit

Department of Environmental Biology and Fisheries Science

Website

https://www.grb.gov.tw/search/planDetail?id=2007707

Year

2010

Start date/計畫起

01-01-2010

Expected Completion/計畫迄

31-12-2010

Bugetid/研究經費

766千元

ResearchField/研究領域

其他（理）
海洋科學

臺灣東北部海域在黑潮與大陸沿岸冷水團兩種不同性質水團之勢力消長及相互推移下﹐將造成黑潮流軸的變動及溫度､鹽度､營養鹽等生物地化通量的變化﹐加上易形成聲速剖面負梯度，影響聲納偵測效能，加上東北海域受琉球島弧地形，黑潮在此轉向，以及異常海況(颱風)之影響，造成海洋環境變化複雜，連帶影響海軍水下偵測系統運用與潛艦航行安全，亦可能會造成測深儀、ADCP 海流儀及側掃聲納等以聲波為探測工具之結果有所偏差。又在海洋變動之同時﹐深海散漫層之生物量分佈、組成、密度及其體積散射強度的變動特性，亦隨之有大中小尺度之時空間變動。而有鑑於深海散射層對水下偵測有關之各項變動因素與不確定性，有必要掌握其對水下偵測的變化特性與影響，進而ASORPS 運用聲學模式與聲納方程式分析各項海洋環境因素對水下偵測音響參數之影響，以做為東北海域水下目標定位與反潛戰術設計之依據，協助建立東北海域從環境觀測、聲學特性分析到反潛戰術設計之整合水下偵測能力。緣此，本研究擬配合總計畫之音傳實驗，及子計畫3 之水文及聲速分布變化特性研究進行研究海域不同海洋環境下深海散漫層群聚之日夜分布、組成、密度及其體積散射強度的變動特性，並嘗試與整合計畫及子計畫1 之音傳資料相比對，以探討其對音傳損耗的影響。 According to the possible effects of Kuroshio and Coastal waters of Mainland, these changes of physical, chemical and fishery oceanography could have profound impacts on the sound speed profile that are important to underwater acoustic characteristics, acoustic detection sensitivity and operation, submarine security and safety in this sea. Generally, deep scattering layer with its behavior of diurnal vertical distribution may be served as the key interface of sound speed profile. The quantifying, predicting, and exploiting uncertainty of deep scattering layers were an attentive issue on underwater acoustic modeling and prediction in general. Studying and monitoring on the interaction of environmental factors and the volume scattering strength, density, composition of DSL may provide data for the predicted ability of ASORPS and sonar equation. The major purpose of this project are established in an investigative work based on acoustic with biological sampling surveys aiming at the assessment of abundance, diurnal vertical distribution, density and acoustic volume scattering strength of deep scattering layer in the waters of northeastern Taiwan. The historical acoustic data in the water will be collected in this year. The temporal and spatial variation of DSL volume scattering strength associated with the temperature, salinity, current and sound speed profile will be also discussed for the transmission loss of acoustic energy and compared for updating data of ASORPS and the possible uncertainty on acoustical modeling and forecasting.

Keyword(s)

不確定性
深海散漫層
音響
Quantifying
Predicting
and Exploiting Uncertainty
Deep scattering layer
acoustic

DSpace CRIS

Quantifying, Predicting, and Exploiting Uncertainty (QPE) Induced by Deep Scattering Layer in the Northeastern Waters of Taiwan (III)

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