New Methods of Fitting the Membership Function of Oceanic Water Masses

作     者：LIFengqi XIEJun LIYao 

作者机构：CollegeofEnvironmentalScienceandEngineeringOceanUniversityofChinaQingdao266003P.R.China 

出 版 物：《Journal of Ocean University of China》 (中国海洋大学学报（英文版）)

年 卷 期：2004年第3卷第1期

页      面：1-9页

学科分类：07[理学] 0707[理学-海洋科学] 

基　　金：supported by the Research Funds for the Doctoral Program of Higher Education in China(No.2000042301) the National Natural Science Foundation of China(No.40276009) The Ministry of Science and Technology of China supported this study through the South China Sea Monsoon Experiment(SCSMEX)program and the National Key Program for Developing Basic Science under contract(No.G1999043800) 

主　　题：water mass T-S curve fuzzy sets membership function the South China Sea (SCS) Bashi Channel (Luzon Strait) 

摘      要：After reviewing the analytical theories of T S curve, some methods of T S relationship, and fuzzy sets for studying water masses, new methods of fitting the membership function of oceanic water masses are presented based on the characteristics of T S curve family of oceanic water masses. The membership functions of oceanic Subsurface Water Mass with high salinity and Intermediate Water Mass with low salinity are fitted and discussed using the new methods. The proposed methods are useful in analyzing the mixing and modifying processes of these water masses, especially in tracing their sources. The principles and formulae of the new methods and examples are given.