FIGURE 12 ZONAL ANOMALY OF SEA SURFACE TEMPERATURE IN AUGUST WITH 

 APPROXIMATE AREAS FOR USING EQUATIONS (9), (10), (II), AND (12) 



of the location. One can expect the zonal anomaly distrilDution to be 

 helpful in identification of main surface water masses. The distribu- 

 tion reveals approximate areas of individual water types, although not 

 as distinctly as desired. Positions and variability of boundaries giv- 

 en in figure 12 are only approximate. The boundaries can be expected 

 to oscillate periodically and nonperiodically. 



In general equation (9) is suitable for temperate areas where weak 

 and moderate zonal anomalies occior. Equation (10) applies to areas with 

 strong zonal anomalies, which usually occur in waters with northward or 

 southward flow. The northern boundaries of equation (11) seem to concur 

 with inflections of weak and moderate anomalies from a southwesterly trend; 

 similar inflection occurs along the southern boundary. The boundaries of 

 equation (12) were designed approximately along -3° to -k F zonal anomaly 

 isopleths. 



28 



