tailieunhanh - Báo cáo nghiên cứu khoa học " Computing vertical profile of temperature in the SOUTH-China SEA using Cubic Spline functions "

Trong văn bản này xấp xỉ spline cho các ứng dụng thực nghiệm WS hồ sơ theo chiều dọc của các thông số hải dương học Chẳng hạn như độ mặn, nhiệt độ hoặc mật độ để Có được một kết quả quý giá hơn và đáng tin cậy của nội suy. Thí nghiệm của chúng tôi với các hộp hồ sơ nhiệt độ quan sát ở Biển Đông cho thấy các khối đa thức spline đó phương pháp | Pham Hoang Lam Ha Thanh Huong Pham Van Huan - Computing vertical profile of temperature in Eastern Sea using cubic spline functions. Vietnam National University Hanoi Journal of Science Earth Sciences Volume 23 No. 2 2007 pp. 122-125 COMPUTING VERTICAL PROFILE OF TEMPERATURE IN THE SOUTH-CHINA SEA USING CUBIC SPLINE FUNCTIONS Pham Hoang Lam Ha Thanh Huong Pham Van Huan University of natural sciences VNU Abstract In this text the spline approximation was applied to the empirical vertical profiles of oceanographic parameters such as temperature salinity or density to obtain a more precious and reliable result of interpolation. Our experiments with the case of observed temperature profiles in the East sea show that the cubic polynomial spline method has a higher reliability and precision in comparison with the linear interpolation and other traditional methods. The method was realized into a subroutine in our programs of management and manipulation of oceanographic data. As an application the observed temperature field from World Ocean Data Base 2001 consisting of about 137000 vertical profiles have been analyzed to examine the features of the vertical distribution of temperature in the East sea. It is found that the upper homogeneous layer in the summer months is only a thin one with the thickness of about 10 m but in the winter months this layer expands to the depth of about 50-60 m and even more. And the thickness of upper mixing layer changes largely from year to year as well with a range from about 20 m to about 70 m. Temperature is always an important factor in the research of physics in general and particular in oceanography. With the rapid development of the information technology the computation and prediction of the oceanographic parameters are of special interest. Sea water temperature is an important part of the input of the modern thermodynamical model. In many application the water temperature and other oceanographic parameters at different horizons are