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Nature 431, 920-921 (21 October 2004) | doi:10.1038/431920a; Published online 20 October 2004

Climate:  Wider connections for El Niño

William J. Randel1

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Data from Europe in 1940–42, and simulations of severe El Niño events, suggest that the effects of such events can be unexpectedly far-reaching. The stratosphere could be a key player in this behaviour.

Climate variations associated with the El Niño/Southern Oscillation (ENSO) cause droughts, floods and extreme temperatures over much of the tropics, and the effects are often felt in North America. Brönnimann et al.1 (page 971 of this issue) now show that climate anomalies associated with the large El Niño of 1940–42 extended to much more of the Northern Hemisphere, including Europe.

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