ENSO amplitude change in observation and coupled models

@article{Zhang2008ENSOAC,
  title={ENSO amplitude change in observation and coupled models},
  author={Qiong Zhang and Yuexia Guan and Haijun Yang},
  journal={Advances in Atmospheric Sciences},
  year={2008},
  volume={25},
  pages={361-366}
}
Observations show that the tropical El Niño-Southern Oscillation (ENSO) variability, after removing both the long term trend and decadal change of the background climate, has been enhanced by as much as 60% during the past 50 years. This shift in ENSO amplitude can be related to mean state changes in global climate. Past global warming has caused a weakening of the Walker circulation over the equatorial Indo-Pacific oceans, as well as a weakening of the trade winds and a reduction in the… 
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