Improved El Niño forecasting by cooperativity detection

Although anomalous episodic warming of the eastern equatorial Pacific, dubbed El Niño by Peruvian fishermen, has major (and occasionally devastating) impacts around the globe, robust forecasting is still limited to about 6 mo ahead. A significant extension of the prewarning time would be instrumental for avoiding some of the worst damages such as harvest failures in developing countries. Here we introduce a unique avenue toward El Niño prediction based on network methods, inspecting emerging teleconnections. Our approach starts from the evidence that a large-scale cooperative mode—linking the El Niño basin (equatorial Pacific corridor) and the rest of the ocean—builds up in the calendar year before the warming event. On this basis, we can develop an efficient 12-mo forecasting scheme, i.e., achieve some doubling of the early-warning period. Our method is based on high-quality observational data available since 1950 and yields hit rates above 0.5, whereas false-alarm rates are below 0.1.

[1]  L. Goddarda,et al.  CURRENT APPROACHES TO SEASONAL-TO-INTERANNUAL CLIMATE PREDICTIONS , 2000 .

[2]  John A. Knaff,et al.  How Much Skill Was There in Forecasting the Very Strong 1997–98 El Niño? , 2000 .

[3]  Benjamin Kirtman,et al.  Decadal Variability in ENSO Predictability and Prediction , 1998 .

[4]  P. Glynn.  Coral reefs of the eastern Pacific , 1996, Coral Reefs.

[5]  R. Reynolds,et al.  The NCEP/NCAR 40-Year Reanalysis Project , 1996, Renewable Energy.

[6]  Swadhin K. Behera,et al.  Extended ENSO Predictions Using a Fully Coupled Ocean–Atmosphere Model , 2008 .

[7]  A. Tsonis,et al.  Topology and predictability of El Niño and La Niña networks. , 2008, Physical review letters.

[8]  Henk A. Dijkstra,et al.  Nonlinear Physical Oceanography: A Dynamical Systems Approach to the Large Scale Ocean Circulation and El Niño, , 2000 .

[9]  B. Kirtman,et al.  El Niño in a changing climate , 2009, Nature.

[10]  M. Latif,et al.  El Niño/Southern Oscillation response to global warming , 2009, Proceedings of the National Academy of Sciences.

[11]  Paul J. Roebber,et al.  What Do Networks Have to Do with Climate , 2006 .

[12]  B. Kirtman.  The COLA Anomaly Coupled Model: Ensemble ENSO Prediction , 2003 .

[13]  Alexey Kaplan,et al.  Predictability of El Niño over the past 148 years , 2004, Nature.

[14]  S. Brönnimann,et al.  Extreme climate of the global troposphere and stratosphere in 1940–42 related to El Niño , 2004, Nature.

[15]  Mark A. Cane,et al.  The El Niño-Southern Oscillation Phenomenon , 2010 .

[16]  S. Havlin,et al.  Emergence of El Niño as an autonomous component in the climate network. , 2010, Physical review letters.

[17]  Mike Davis,et al.  Late Victorian holocausts : El Niño famines and the making of the Third World , 2003 .

[18]  Cma Training,et al.  Predictability of Weather and Climate , 2011 .

[19]  Wolfgang Lucht,et al.  Tipping elements in the Earth's climate system , 2008, Proceedings of the National Academy of Sciences.

[20]  Henk A. Dijkstra,et al.  The ENSO phenomenon: theory and mechanisms , 2006 .

[21]  Stefano Schiavon,et al.  Climate Change 2007: The Physical Science Basis. , 2007 .

[22]  Andrew T. Wittenberg,et al.  How Predictable is El Niño , 2003 .

[23]  Hans von Storch,et al.  Computer modelling in atmospheric and oceanic sciences , 2004 .

[24]  J. Woodruff,et al.  Intense hurricane activity over the past 5,000 years controlled by El Niño and the West African monsoon , 2007, Nature.

[25]  Michael Ghil,et al.  Predicting stochastic systems by noise sampling, and application to the El Niño-Southern Oscillation , 2011, Proceedings of the National Academy of Sciences.

[26]  Mojib Latif,et al.  A review of ENSO prediction studies , 1994 .

[27]  Prashant D. Sardeshmukh,et al.  The Optimal Growth of Tropical Sea Surface Temperature Anomalies , 1995 .

[28]  Allan J. Clarke,et al.  An Introduction to the Dynamics of El Nino and the Southern Oscillation , 2008 .

[29]  Eli Tziperman,et al.  Controlling Spatiotemporal Chaos in a Realistic El Niño Prediction Model , 1997 .

[30]  Mark A. Cane,et al.  Experimental forecasts of El Niño , 1986, Nature.

[31]  Á. Corral,et al.  Scaling of tropical-cyclone dissipation , 2009, 0910.0054.

[32]  Andy Haines,et al.  El Niño and health , 2003, The Lancet.

[33]  S. Kaveri,et al.  Tipping elements in the Earth System , 2010 .

[34]  Corinne Le Quéré,et al.  Climate Change 2013: The Physical Science Basis , 2013 .

[35]  Dake Chen,et al.  El Niño prediction and predictability , 2008, J. Comput. Phys..

[36]  Martijn Gough.  Climate change , 2009, Canadian Medical Association Journal.

[37]  Eli Galanti,et al.  A Study of ENSO Prediction Using a Hybrid Coupled Model and the Adjoint Method for Data Assimilation , 2003 .

[38]  S. Havlin,et al.  Climate networks around the globe are significantly affected by El Niño. , 2008, Physical review letters.

[39]  Nebojsa Nakicenovic,et al.  Avoiding dangerous climate change , 2006 .