FISHERY BULLETIN: VOL. 69, NO. 4 



PIQUERO 7 

 Part I 



19 Jung 



CHLOROPHYLL 0. 



J"S/L 



2 3 



0^ 



Figure 2. — The time sequence of changes in the config- 

 uration of Patch 2 as shown by the mapping of the total 

 chlorophyll a and phaeopigments concentration {fig/ 

 liter) in the surface (i.e., 3 m) waters. 



19 20 21 22 



TEMPERATURE °C 



Figure 3. — Variation in total chlorophyll a and phaeo- 

 pigments concentration with temperature noted in an 

 east to west transect across Patch 2. 



at 10 m (Figure 4). At greater depths at this 

 location flow was generally eastward at velocities 

 up to 4 cm/sec. A small northerly component 

 was seen at 50 m. A horizontal divergence was 

 aijparent between the two stations from the 

 zonal components of the velocity measured at 

 10 m. 



In addition to indicating the horizontal direc- 

 tion of water flow, measurements from current 

 meters can be used to estimate vertical shear 

 (Table 2). Shear on the west side of Patch 2 

 was generally low because of fairly uniform flow 

 toward the east. Maximum vertical shear in- 

 side the patch and to the east of the front was 

 up to seven times greater than the maximum 

 to the west of the patch. The large negative 

 meridional (north-south) shear in the patch sig- 

 nified a change from weak northerly flow to 

 strong southerly flow at 49 m. 



864 



