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dvdDiy扣件原住民教育困境OTA
   
   
   
     
   
 
項次 書目
1
題名:Mean Structure and Transport of Taiwan Current (Kuroshio)    
台灣海流(黑潮)的平均流速與流量
著者:Cho-Teng Liu(劉倬騰) ;Shih-Pei Cheng(鄭世培) ;Wen-Ssn Chuang(莊文思) ;Yih Yang(楊益) ;Hsien-Wen Li(李賢文)
出版地區:台灣
出版城市:台北市
學科:地球科學
關鍵字:黑潮 ; 台灣海流 ; 世界海洋環流實驗 ; 流量 ; Kuroshio ; WOCE ; PMC1 ; Transport ; Taiwan
刊名:ACTA Oceanographica Taiwanica
卷期:36卷2期(1998.2)
頁碼:159-176
語言:英語
摘要: 中文摘要PDF ; 英文摘要PDF

台灣東邊的黑潮,又名台灣海流,它源自於呂宋東方的北赤道洋流,流至琉球與日本海域時,日人稱為黑湖。自1990年10月至1995年5月間,我們沿著宜蘭海脊調查台灣海流(黑潮)的水文,以量測其流速結構與流量。此項海流調在屬於中華民國承接世界海洋環流實驗(WOCE)的一部分。自1965年黑潮聯合研究(CSK)以來,已鮮有台灣海流的水文調查。歷年來,以地轉流速推算的台灣海流流量為18.7 Sv至44.2 Sv之間,在600公里下游的琉球附近,黑潮流量在0至46.8 Sv之間。ROC WOCE的12次估算得平均地轉流量為13.5 Sv。在計算地轉流量中,底流速度(vb)的貢獻得靠直接量測流速才能確定。我們採用由船載都普勒剖流儀(ADCP),沿宜蘭海脊量測的10航次的海流斷面當作直接量測的流速,並將其與密度放地轉流速重新取樣至10m深與0.1°寬的網格上。經10航次的平均後,潮流、航向及流速量測所導致的誤差已相當小。ADCP的流速資料顯示,水愈淺則vb愈大,地轉速的修正量也愈大。在台灣和與那國島之間,台灣海流(黑潮)的流軸多半靠台灣這邊,在上層350m的流量是19.7 Sv,若利用地轉流切推算350m以下的流速,可得總流量約22.6 Sv,它與琉球西方的黑湖10年平均流量25.5 Sv相當。
From October 1990 to May 1995, 12 hydrographic cruises were made along a submarine ridge northeast of Taiwan to measure the velocity structure and volume transport (VT) of the Kuroshio east of Taiwan, or the Taiwan Current (Wyrtki, 1961). These are part of the Republic of China (ROC) contribution to World Ocean Circulation Experiment (WOCE). PCM1 subprogram. From the few hydrographic surveys since 1965, geostrophic computation of the Taiwan Current volume transport (TVT) ranged from 18.7×106m3/s (Sv) to 44.2 Sv, compared to 0 to 46.8 Sv of Kuroshio VT (KVT) in the deeper water regime 600 km downstream near Okinawa. The 12-cruise mean of geo strophic TVT across the ridge was 13.5 Sv. Direct measurement of the velocity field is necessary to assess the contribution of the bottom velocity, Vb in the geostrophic computation of TVT. Ten sections of ship-board ADCP (Acoustic Doppler Current Profiler) velocity Va were available to estimate Kuroshio's Vb over the shallow ridge. The sections of Va, density and geostrophic velocity vg were all interpolated onto the same grid along PCM1. The averaging of 10 velocity sections reduces uncertainties caused by tidal currents, ship-heading and amplitude errors in the ADCP data. The average of Va-Vg is much larger in shallow regions where Vb is significant than in deep regions where the reference velocity is low. The ADCP section between Taiwan and Yonaguni shows that flow axis of Taiwan Current (Kuroshio) was closer to Taiwan than in the geostrophic velocity section and the TVT was 19.7 Sv for the upper 350 m. Using geostrophy to extend the ADCP velocity profiles to the sea bottom, we estimate the TVT at 22.6 Sv, which is close to the 10-year mean of KVT near Okinawa of 25.5 Sv.


    

本卷期目次
ACTA Oceanographica Taiwanica 36卷2期 (1998.2)
A Case Study of Polar Low over the Japan Sea-Part One: The analyzed results/ Gang FuQin-Yu LiuZeng-Mao Wu
ARIMA Modeling and Forecasting the Albacore Catch and CPUE of the Taiwanese Tuna Longline Fishery in the South Atlantic Ocean/ Chi-Lu SunSu-Zan Yeh
臺灣北部近海海底地形構造初探/ 劉宗盛王正松王舒龍許明光
Mean Structure and Transport of Taiwan Current (Kuroshio)/ Cho-Teng LiuShih-Pei ChengWen-Ssn ChuangYih YangHsien-Wen Li
The Spreading of the South China Sea Water to the East of Taiwan During Summertime/ Ching-Sheng ChernJoe Wang
 
   
 
   

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