Table 3 gives the 7-yr mean values by month of the daily 3(b) is well representative of both sets. The southern portion 



mean indices. Table 4 gives the corresponding mean values is primarily an area of positive mean values of the indices 



of the weekly mean indices. The values in Tables 3 and 4 are, indicating upwelling conditions on the average throughout 



of course, nearly identical, differing only in that a given the year. The northern portion is primarily a region of 



weekly mean may overlap two consecutive months. Figure average downwelling (negative indices). Maximum mean 



Table 3. -Seven-year 11967-73) composite monthly averages of daily means of 6-hourly up- 

 welling indices. Units are cubic meters per second per 100 m of coastline. 



Table 4. — Seven-year (1967-73) composite monthly averages of weekly means of 6-hourly 

 upwelling indices. Where a given weekly value overlaps two different months, it is assigned 

 to the month wherein falls the midpoint (Wednesday) of the week. Units are cubic meters 

 per second per 100 m of coastline. 



