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Fishery Bulletin 94(4), 1996 



the same period from 1988 to 1991, but wind direc- 

 tion reversed in late December and the greater part 

 of February and March 1992, blowing predominantly 

 from the southeast for 2-12 d at a time (Fig. 3A). Co- 

 incidentally, water in the upper 80 m was warmer and 

 fresher following these periods of southeast winds (Fig. 

 3, B and C); water of 15°C and 33.2%c occurred near 



B 



200 



Average temperature (°C) 



200 



December January February 



Average salinity ("/„,) 



I ' ' ' 

 March April 



Figure 2 



Wind, temperature, and salinity profiles for offshore 

 Monterey Bay, California. (A) Wind vectors from Decem- 

 ber to April, as estimated from daily wind components 

 measured at buoy 46042 and averaged from 1988 to 1991 

 (arrows point in the direction to which wind was blowing 

 [north is toward top of pageli; iBl weekly average tem- 

 perature (°C); and (C) salinity (%e>) in upper 200 m in the 

 outer part of Monterey Bay during December to April, 

 1989-91. Weeks of CTD sampling are indicated with 

 dashes. (Raw data from Rosenfeld et al . 1994b. i 



the surface by 2 April. Contoured vertical sections of 

 temperature during the spring ichthyoplankton sur- 

 veys off Davenport in 1992 indicated an increasingly 

 stratified and warm water column at least to 19 km 

 offshore (Fig. 4A); isohalines were similarly strati- 

 fied. There was no evidence of upwelling (i.e. no shoal- 

 ing of isotherms and isohalines near the coast) dur- 

 ing winter-spring 1992. For comparison with the 

 following year, note that the 10°C isotherm remained 

 below 100 m during the 1992 sampling season. 



It 



10 



o 

 -10 



Average daily winds 



200 



02 18 09 23 06 21 12 02 



Average temperature (°C) 



:>00 



—i r - 



09 23 06 2 



i.n.i t-v February 



Average salinity (7„) 



March Apnl 



Figure 3 



Wind, temperature, and salinity profiles for offshore Dav- 

 enport, California. (Ai Daily averaged wind vectors mea- 

 sured at buoy 46042 in Monterey Bay (arrows point in di- 

 rection to which wind was blowing (north is toward top of 

 pageli; (Bl temperature (°C); and (C) salinity (% I in upper 

 200 m at an offshore station (19 km) during ichthyo- 

 plankton surveys 2 December 1991-2 April 1992 CTD 

 sampling dates are indicated with dashes. 



