SAUR: SEA LEVEL DIFFERENCES 



fornia and Hawaii. One would like information 

 on the strength of the California Current, on the 

 role of upwelling in the variations of the current, 

 about the movement of the boundary or transi- 

 tion zone between the central water mass and 

 the waters of the California Current, and about 

 the interconnection between the California Cur- 

 rent and the North Equatorial Current. The 

 larofe chang-es in sea level at Honolulu as com- 

 pared to San Francisco during periods of strong 

 anomalies in the sea level difference (Table 6) 

 raise the question as to how the California Cur- 

 rent may vary in strength or width in relation 

 to changes in the central water mass and position 

 of the eastern North Pacific anticyclonic cur- 

 rent gyre. Such environmental information has 

 important applications for advisory services and 

 forecasting for fisheries along the west coast of 

 the United States. 



One consequence of the preliminary work with 

 sea level differences (Saur, 1966) mentioned 

 earlier was the start of a pilot program of ex- 

 pendable bathythermograph observations be- 

 tween Honolulu and San Francisco aboard a 

 merchant ship (Saur and Stewart, 1967) in June 

 1966, which continued at a frequency of up to 

 20 sections per year through 1970. Although the 

 period of observation is very short as compared 

 to the sea level records, it is hoped that the anal- 

 ysis of these observations can better define con- 

 ditions related to the anomalous weak circula- 

 tion in 1967 inferred from the sea level records, 

 and shed light on the more specific problems 

 mentioned above. 



ACKNOWLEDGMENTS 



It is a pleasure to submit this contribution 

 honoring Dr. 0. E. Sette, a great scientist, asso- 

 ciate for many years, and friend. This explora- 

 tory investigation of sea level differences is one 

 outgrowth of many stimulating discussions with 

 him on environmental variability and its impli- 

 cations to fisheries. 



I am greatly indebted to Laurence E. Eber for 

 encouragement and much valuable advice, in- 

 cluding information on the smoothing procedure, 

 and to Mrs. Dorothy D. Roll for computer pro- 



gramming and assistance in data processing. 

 Jerome Namias and Gunter R. Seckel also pro- 

 vided helpful suggestions. 



LITERATURE CITED 



Apple, R. A., and G. A. MacDonald. 



1966. The rise of sea level in contemporary times 

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 Bjerknes, J. 



1961. "El Niiio" study based on analysis of ocean 

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1966. Survey of El Nifio 1957-58 in its relation to 

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 Charnell, R. L., D. W. K. Au, and G. R. Seckel. 



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1944a. World weather records (first reprint). 

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1944b. World weather records, 1921-1930 (first re- 

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 DONN, W. L., J. G. Pattullo, and D. M. Shaw. 



1964. Sea-level fluctuations and long waves. In 

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633 



