Các dữ liệu quan sát trên biển khoản tham chiếu tại bốn điểm ở khu vực gần bờ biển miền Trung Việt Nam để xử lý IS Có được đặc điểm của hiện tại về số lượng như vậy là vận tốc tối đa, chỉ đạo và pha của dao động và các thành phần còn lại. Do tính năng hiện tại khu vực trải dài 11-18 về IS phân biệt vào hai phần. Các phần phía bắc từ 16 oN IS đặc trưng bởi hiện tại phía bắc nhẹ nhàng và đồng nhất theo chiều dọc khoản tham chiếu. | VNU. JOURNAL OF SCIENCE Nat. Sci. no3 - 1998 SOME CHARACTERISTICS OF SEA CURRENT IN THE REGION NEAR THE COAST OF THE CENTRAL VIETNAM Pham Van Huan Faculty of Hydrometeorology and Oceanography College of Natural Sciences - VNU Abstract The observation data on the sea currents at four points in the region near the coast of Central Vietnam is treated in order to obtain quantitative characteristics of currents such as maximum velocities direction and phase of oscillations and residual components. Due to the current feature the region stretchingfrom 11 to 18 oN is differentiated into two parts. The northern part from 16 oN northward is characteristic by the gentle residual current and the vertically homogenous strong tidal currents of the diurnal type. In the rest part the tidal current is of mixed type and light force. There the non-periodic currents are complicated and consisted of both locally developed windgenerated component and the steady current descended from the cold circulation system of the west of the South-china sea in winter. This component prevails over all the others and causes the southward undersurface strong stream of water along the coastline of the Central Vietnam. The sea region near the coast of the Central Vietnam belongs to the zone of activity of the circulation system in the west of the South-china sea. To identify the features of the sea currents in this region is an important problem of the regional oceanography. The information on the sea water circulation is very useful in the interpretation of many features of the natural conditions of the region such as oceanographic fields the distribution of sea bottom sediments the transition property and the abundance in species composition of the livings in this coastal segment of the sea. The existing publications on the South-china sea circulation 1-6 show that the sea region near the coast of the Central Vietnam is the place of the intensification of the cold current in Western South-china
