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分析了从 1 955～ 1 999年 45年热带、副热带太平洋地区次表层温度距平资料 ,在分析沿赤道距平极值曲面的深度分布后 ,认为它基本接近气候温跃层的深度分布。由此分析了 1 994～ 1 999年该曲面上温度距平的演变发现 :1 997/ 1 998年ElNi no产生时 ,在热带西太平洋暖池次表层 (1 60m附近 )的温度正距平 ,是从 1 994/ 1 995年ElNi no在Ni no 3区的最大正距平信号传播或演变过来的 ,整个最大正距平信号的传播轨迹形成一似“8”字的形状。与此同时 ,当正的温度距平开始从暖池向东传播时 ,一最大温度负距平信号在Ni no 3区出现 ,并伴随赤道最大正距平信号的东传 ,在其北部 (5～ 1 0°N)向西传 ,然后又向东传最后到达Ni no 3区 ,其传播轨迹形成一扁“0”字形状。分析表明 ,1 997/ 1 998年这次完整的ElNi no/LaNi na事件主要是在热带流系的温跃层附近形成并传播的。
The data of subsurface temperature anomalies in the tropical and subtropical Pacific over 45 years from 1995 to 1999 are analyzed. After analyzing the depth distribution of the extreme equatorial surface along the equator, it is considered to be close to the depth distribution of the thermocline. The evolution of the temperature anomaly on the surface from 1994 to 1999 was analyzed. The temperature anomalies in the subtropical surface (around 160 m) of the tropical western Pacific warm pool during 1997-1998 ElNi no. Is the signal from the largest positive anomaly of El Niño in Ni no 3 region from 1994 to 1995. The propagation path of the entire maximum positive anomalous signal forms an “8” shape. In the meantime, when positive temperature anomalies begin to propagate eastward from the warm pool, a negative signal of maximum temperature anomaly appears in the Ni no 3 region along with the eastern equatorial maximum anomaly signal, ~ 1 0 ° N) to the west, then to the east and finally to the Ni no 3 area, the propagation path of which forms a flat “0” shape. The analysis shows that the complete El Niño / LaNi na event of 1 997/98 formed and propagated mainly in the thermocline of the tropical stream.