PLATE 3 Sea surface temperature during a non-El Nino year. The warm 

 water is located in the western Pacific. The 29°C isotherm is located at 

 I70°E. Satellite data processed and provided by Dr. Xiao-Hai Yan at the 

 Center for Remote Sensing, University of Delaware. 



PLATE 4 Sea surface temperature during an El Nino year. The warm 

 water extends to the central and eastern Pacific. The 29°C isotherm 

 extends to 159°E. Satellite data processed and provided by Dr. Xiao-Hai 

 Yan at the Center for Remote Sensing, University of Delaware. 



