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El Niño–Southern Oscillation complexity
Timmermann, Axel,An, Soon-Il,Kug, Jong-Seong,Jin, Fei-Fei,Cai, Wenju,Capotondi, Antonietta,Cobb, Kim,Lengaigne, Matthieu,McPhaden, Michael J.,Stuecker, Malte F.,Stein, Karl,Wittenberg, Andrew T.,Yun, Nature Publishing Group UK 2018 Nature Vol.559 No.7715
<P>El Nino events are characterized by surface warming of the tropical Pacific Ocean and weakening of equatorial trade winds that occur every few years. Such conditions are accompanied by changes in atmospheric and oceanic circulation, affecting global climate, marine and terrestrial ecosystems, fisheries and human activities. The alternation of warm El Nino and cold La Nina conditions, referred to as the El Nino-Southern Oscillation (ENSO), represents the strongest year-to-year fluctuation of the global climate system. Here we provide a synopsis of our current understanding of the spatio-temporal complexity of this important climate mode and its influence on the Earth system.</P>
Cai, Wenju,Santoso, Agus,Wang, Guojian,Yeh, Sang-Wook,An, Soon-Il,Cobb, Kim M.,Collins, Mat,Guilyardi, Eric,Jin, Fei-Fei,Kug, Jong-Seong,Lengaigne, Matthieu,McPhaden, Michael J.,Takahashi, Ken,Timmerm Nature Publishing Group, a division of Macmillan P 2015 Nature climate change Vol.5 No.9
The El Niño/Southern Oscillation (ENSO) is the dominant climate phenomenon affecting extreme weather conditions worldwide. Its response to greenhouse warming has challenged scientists for decades, despite model agreement on projected changes in mean state. Recent studies have provided new insights into the elusive links between changes in ENSO and in the mean state of the Pacific climate. The projected slow-down in Walker circulation is expected to weaken equatorial Pacific Ocean currents, boosting the occurrences of eastward-propagating warm surface anomalies that characterize observed extreme El Niño events. Accelerated equatorial Pacific warming, particularly in the east, is expected to induce extreme rainfall in the eastern equatorial Pacific and extreme equatorward swings of the Pacific convergence zones, both of which are features of extreme El Niño. The frequency of extreme La Niña is also expected to increase in response to more extreme El Niños, an accelerated maritime continent warming and surface-intensified ocean warming. ENSO-related catastrophic weather events are thus likely to occur more frequently with unabated greenhouse-gas emissions. But model biases and recent observed strengthening of the Walker circulation highlight the need for further testing as new models, observations and insights become available.
Author Correction: El Niño-Southern Oscillation complexity
Timmermann, Axel,An, Soon-Il,Kug, Jong-Seong,Jin, Fei-Fei,Cai, Wenju,Capotondi, Antonietta,Cobb, Kim M.,Lengaigne, Matthieu,McPhaden, Michael J.,Stuecker, Malte F.,Stein, Karl,Wittenberg, Andrew T.,Yu Springer Science and Business Media LLC 2019 Nature Vol.567 No.7746