CONTENTS 



Page 



Introduction 1 



Method 1 



Constants employed in the stress calculation 3 



Atmospheric pressure data 3 



Distortion of spatial distributions 4 



Discussion 5 



Acknowledgment 8 



Literature cited 8 



Appendix— Tabulations and plots of daily and weekly upwelling indices 9 



60°N, Ud^W 10 



60°N, 146°W 17 



57°N, 137°W 24 



54°N, 134°W 31 



51°N, 131°W 38 



48°N, 125°W 45 



45°N, 125°W 52 



42°N. 125°W 59 



39°N, 125°W 66 



36°N, 122°W 73 



33°N, 119°W 80 



30°N, 119°W 87 



27°N, 116°W 94 



24°N, 113°W 101 



21°N, 107°W 108 



Figures 



1. Data grid. Intersections at which upwelling indices are computed are marked with large dots 2 



2. Distribution of observations made at 1800 GMT, 5 January 1974, which arrived at Fleet Numerical 

 Weather Central in time for incorporation in the operational surface pressure analysis 3 



3. Long-term annual cycle of offshore Ekman transport. Units are cubic meters per seond per 100 m 

 of coastline, (a) Cycle formed by averaging transports computed from individual wind observations 

 taken at sea within the one degree coastal squares indicated in Figure 3(c). (b) Cycle formed from 

 6-hourly upwelling indices averaged by month at the locations indicated in Figure 3(c). (c) Coast- 

 line drawing. Coastal squares for Figure 3(a) are shaded. Locations for Figure 3(b) are indicated by 

 dots 4 



Tables 



1. Coastline orientations chosen to characterize the dominant coastline trend at each location on a scale 

 of approximately 200 miles. The directions of vectors tangent to the coast with the ocean on the 

 right are given in degrees from true north 3 



2. Dates for which daily averages represent fewer than the total four possible synoptic samplings. The 

 times (Pacific Standard Time) of the missing samplings are indicated to the right of each date 5 



3. Seven-year (1967-73) composite monthly averages of daily means of 6-hourly upwelling indices. 

 Units are cubic meters per second per 100 m of coastline 6 



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 ... 6 



5. Standard deviations of daily means of 6-hourly upwelling indices grouped by long-term (1967-73) 

 month. Units are cubic meters per second per 100 m of coastline 7 



6. Standard deviations of weekly means of 6-hourly upwelling indices grouped by long-term (1967-73) 

 month. 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 7 



ui 



