Wyrtki , K. 1965. The annual and semi-annual variation 

 of sea surface temperature in the North Pacific 

 Ocean. Limnol . Oceanogr. 10:307-313. 



Monthly averages of sea surface temperatures 

 for the period 1947 to 1960 are used to 

 determine the amplitude and phase of annual 

 and semi-annual thermal variations. 



KEY WORDS: sea surface temperature, season. 



Wyrtki, K. , E. Stroup, W. Patzert, R. Williams, and W. 

 Quinn. 1976. Predicting and observing El Nino. 

 Science (Wash., D. C. ): 343-346 . 



Defined Southern Oscillation and presented a 

 theory for mechanisms leading to El Nino. 

 Described the 1975 oceanographic situation as 

 compared with 1967 and 1968 regarding signi- 

 ficant changes from El Nino conditions in the 

 former year as a return to "normal." 



KEY WORDS: Southern Oscillation, atmospheric 

 pressure, currents, El Nino. 



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