Surface Sediment Properties and Faunal Census of Planktonic Foraminiferal Offshore Northeastern Taiwan: Changes in the Oceanographic Characteristics of the Kuroshio Current

臺灣東北海域表層沉積物和浮游性有孔蟲族群所指示之海洋環境

謝英宗(Ying-Tzung Shieh)

《國立臺灣博物館半年刊》 53卷1期 (2000/06) Pp. 15-34

https://doi.org/10.6532/JTM.200006_53(1).0003

摘要

A detailed study of C-14 dating, coarse fraction, carbonate content, and planktonic foraminifera faunal of twenty-five box cores collected from off northeastern Taiwan. Core conducted locations range from the East China Sea shelf to the southern Okinawa Trough, and the results provide an opportunity to understand the oceanographic conditions of the region where the Kuroshio Current changes flow direction from southward to northeastward. The dominant planktonic foraminifera species in this region are Neogloboquadrina dutertrei, Pulleniatina obliquiloculata, Globigerinoides ruber, and Globigerina bulloides. Distinct patterns in the special distribution of these species reflect the influence of the Kuroshio Current in the area. The concentrations of the planktonic foraminifera indicate that the upwelling center in this area is located close to 25°25'N, 122°25'E.

關鍵字

foraminifera ； Kuroshio Current ； upwelling ； northeastern Taiwan

並列摘要

藉由臺灣東北外海25個箱型岩心表層沉積物的放射性碳十四年代、粗顆粒含量、碳酸鈣含量和浮游性有孔蟲族群的研究，顯示介於東海陸棚和沖繩海槽南端的黑潮轉向區，其海洋環境主要受到源自熱帶海域的黑潮所控制，研究區域的湧昇流中心可能位於北緯25°25’東經122°25’附近。

並列關鍵字

有孔蟲 ； 黑潮 ； 湧昇流 ； 臺灣東北海域