The negative temperature sign can move to the mid tropical pacific then propagates eastward the eastern tropical pacific and change the original positive temperature anomaly . a similar evolution but with an opposite sign follows subsequently . the whole cycle for the enso decadal variability needs about 14 years 负的海温异常可向北传输到热带西太平洋和热带中太平洋，然后东传到热带东太平洋，使其原有的暖异常海温被负的海温异常取代，然后再进行反位相的循环，整个循环过程所需的时间约为14年。
