EBER: SEA-SURFACE TEMPERATURE ANOMALIES 



120* 130* 140* OO* 160* 170* WO* 170* 160* 150* 140* 130* BO* 110* lOO* 90* BO* 



Figure 20. — Sea-surface temperature anomaly for March 

 1959. Hatched areas colder than normal. Heavy lines 

 represent the 1° C anomaly contours which define warm 

 ( + ) or cold ( — ) cells. 



IZO* 130* 140* ISO* ISO* (TO* IBO* 170* 160* 130* 140* 130* 120* 110* 100* 90* 80* 



Figure 22. — Sea-surface temperature anomaly for Feb- 

 ruary 1960. Hatched areas colder than normal. Heavy 

 lines represent the 1° C anomaly contours which define 

 warm (-|-) or cold ( — ) cells. 



Figure 21. — Sea-surface temperature anomaly for No- 

 vember 1959. Hatched areas colder than normal. Heavy 

 lines represent the 1° C anomaly contours which define 

 warm ( -|- ) or cold ( — ) cells. 



I20- I30* 140* 130* 160* 170* WO* 170* ISO* OO* 140* 130* IZO* 110* lOff 90* 60* 



Figure 23. — Sea-surface temperature anomaly for June 

 19ti0. Hatched areas colder than normal. Heavy lines 

 represent the 1 ° C anomaly contours which define warm 

 ( + ) or cold ( — ) cells. 



with a second reversal of the anomaly field in 

 the central and eastern North Pacific Ocean 

 (Figure 27). The principal feature of the new 

 pattern was a warm cell which developed at lat 

 35° N to 45° N, long 145° W to 175° W. 

 Departures from normal temperatures along 

 the coastal zone and in the region to the south- 

 east of the warm cell were weak but predomi- 

 nantly negative. In a broad sense, this distri- 

 bution remained essentially undisturbed for 

 nearly a year. The warm cell shifted eastward 

 in January 1962 (Figure 28), diminished in 

 size and intensity in March and April, but re- 

 vived in June 1962 (Figure 29) . A second warm 



cell was present at that time, but did not re- 

 tain a separate identity for long. The original 

 warm cell began a westward movement which, 

 liy September (Figure 30), returned it to the 

 same location it occupied 11 months earlier in 

 October 1961 (Figure 27). 



MAINTENANCE OF PERSISTENT 

 ANOMALIES 



The examples de.scribed in the iireceding 

 section depict a recurring pattern in the distri- 

 bution of sea-surface temperature anomalies. 

 Schematically, the princijwil features consist of 



351 



