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利用1955-2000年热带、副热带太平洋地区次表层温度距平资料,构造了温度距平极值深度分布曲面图,它很接近20°温度面的深度分布,因此有理由认为这一深度曲面很接近热带温跃层的深度面。在温度距平极值深度曲面上,分析了20世纪60年代后期以来所有El Nino/La Nina事件正/负海温距平信号的分布和传播“轨迹”,发现如果以暖池次表层作为起点,则一般来说,暖水或冷水先是沿赤道极值深度面向东、向上传播或运动,到达赤道东太平洋海盆边界附近后,在那里停留几个月,然后转北运动,在北纬10度左右再折向西运动到西太平洋转向南返回到暖池,即在赤道北侧形成闭合回路。温度距平运动一圈需时2-4年。如果暖（冷）水的温度距平都很强,就会在2-4年的时间上出现两次相邻的El Nino（La Nina）事件,但可能是由于大气或海洋环境条件不合适,温度距平的强度在运动过程中有时会减弱,就不能形成El Nino（La Nina）事件,但暖（冷）水运动的“轨迹”仍可辨认。由于暖、冷水绕环路的运动交替出现,El Nino（La Nina）爆发前,在赤道西太平洋出现正（负）距平信号的同时,在东太平洋北纬10度左右会有负（正）距平信号出现,并且当正（负）距平信号向东传播时,负（正）距平信号向西传播,在赤道上表现为2-4年间隔的El Nino（La Nina）交
Based on the data of subsurface temperature anomalies from 1955 to 2000 in the tropical and subtropical Pacific Ocean, an extreme depth profile of temperature anomalies is constructed, which is close to the depth distribution of the 20 ° temperature surface. Therefore, it is reasonable to assume that this depth surface is very close The depth of the tropical thermocline. On the temperature anomalous extreme depth surface, the distribution and propagation “trajectories” of the positive / negative SST anomalies of all El Nino / La Nina events since the late 1960s are analyzed. It is found that if the subsurface of the warm pool is used as a starting point Generally speaking, warm or cold water first travels eastwards, upwards or upwards along the extreme equatorial depth and stays there for a few months after reaching the equatorial eastern Pacific Basin border, then moves northward and moves about 10 degrees north latitude After a further westward move to the western Pacific turns south and returns to the warm pool, forming a closed loop on the northern side of the equator. Temperature movement in a lap takes 2-4 years. If the temperature of the warm (cold) water is very strong, there will be two adjacent El Nino (La Nina) events in 2-4 years, but it may be due to improper atmospheric or oceanic conditions, The strength of the temperature anomaly is sometimes weakened during the exercise and the El Nino (La Nina) event can not be formed, but the “trajectory” of the warm (cold) water movement is still recognizable. Due to the alternating warm and cold water movement around the loop, before the onset of El Nino (La Nina), there is a positive (negative) anomaly in the western equatorial Pacific while a negative (positive) distance of 10 degrees north latitude in the eastern Pacific The flat signal appears and the negative (positive) anomaly signal propagates westwards as the positive (negative) anomalous signal propagates eastward, showing El Nino (La Nina) at 2-4 years equatorial