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应用模糊聚类软划分算法,根据中美海气TOGA调查8个航次所获得的CTD资料,对热带西太平洋165°E工剖面进行了上层水团分析.分析结果表明,赤道西太平洋上层可分为4个水团,它们是赤道表层水、次表层高盐水、中层次高盐水和中层低盐水,其中赤道表层水和次表层高盐水对ENSO事件的响应最为显著.在埃尔尼诺期间,赤道表层水的温盐值低于反埃尔尼诺的温盐值,水团盘踞空间远远大于反埃尔尼诺的空间,而次表层高盐水的温度和所占空间都低于反埃尔尼诺的相应值,这种变化是由于南赤道流加强,次表层高盐水涌升海面所造成的.此外,还对各个水团的特性、分布结构和热含量变化作了进一步探讨.
Based on the CTD data obtained from TOGA survey of 8 voyages by using the fuzzy clustering soft partitioning algorithm, the upper water mass of 165 ° E section of the tropical western Pacific was analyzed.The results show that the upper reaches of the western equatorial Pacific can be divided into 4 water masses, which are the equatorial surface water, sub-surface high salinity, middle high salinity and middle low salinity, of which the equatorial surface water and subsurface high salinity have the most significant response to ENSO events.In the El Niño period, The surface water temperature and salinity value is lower than that of the anti-El Niño temperature and salinity value, the water entrenched space is much larger than that of the anti-El Niño space, and the subsurface high salty water temperature and the occupied space are lower than the anti- This change is due to the strengthening of the southern equatorial stream and the surging of sub-surface salt water to the sea surface, as well as to the further study on the characteristics, distribution structure and heat content of each water mass.