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NEURAL NETWORK BP MODEL APPROXIMATION AND PREDICTION OF COMPLICATED WEATHER SYSTEMS*
Authors:ZHANG Ren  YU Zhihao and JIANG Quanrong
Institution:Department of Atmospheric Sciences, Nanjing University, Nanjing 210093;Department of Atmospheric Sciences, Nanjing University, Nanjing 210093;Department of Atmospheric Sciences, Nanjing University, Nanjing 210093
Abstract:An artificial neural network BP model and its revised algorithm are used to approximate quite successfully a Lorenz chaotic dynamic system and the mapping relation is established between the indices of Southern Oscillation and equatorial zonal wind and lagged equatorial eastern Pacific sea surface temperature(SST) in the context of NCEP/NCAR data,and thereby a model is prepared.The constructed net model shows fairly high fit precision and feasible prediction accuracy,thus making itself of some usefulness to the prognosis of intricate weather systems.
Keywords:neural network BP model  Lorenz system  equatorial eastern Pacific SST
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