CalCOFI Reports, Vol. 11, 1967 - California Cooperative Oceanic ...

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162 CALIFORNIA COOPERATIVE OCEANIC FISHERIES IKVESTIGATIONS: IO-METER SALINITY IYrIIL*DOCIMO I 13-YEAR MEAN. 1950-19621t .IITEMPERATURE STANDARD DEVIATIONycnooc*o A0OUT THE 13-YEAR MEAN 1f.C)1s -3w -25' -2w-1 1 1 1 1 I I I I I ~ IJ-M.FIGURE 4. Ten-meter salinity (%I; 13-year mean, 1950-62.Interval: 0.2%.slightly larger salinity gradient northwest of GuadalupeIsland. The limited coverage of the CalCOFIpattern does not show the southward and southwestwardcontinuation of the low-salinity tongue as shownby mean-salinity charts of the North Pacific Ocean(see, for example, Schott, 1935; Morskoi Atlas, 1950;or Norpac Atlas, 1960).The results of analyses at shore stations are shownas boxed numbers on these and other distributioncharts. The mean temperatures at the GuadalupeIsland and Cedros Island Stations are 0.5" C. greaterthan at the adjacent stations. In both cases the recordscovered only half of the 13-year period. When neighboringCalCOFI stations were analyzed with equallytruncated records no differences could be found inthe means. Thus, temperature regression values forthe two island stations are misleading and are notgiven.STANDARD DEVIATION ABOUT THE MEANThe distributions of standard deviation about the 13-year means appear in Figures 5 and 6. This measureof dispersion combines the seasonal and nonseasonalinfluences.The chart of standard deviations for temperatureshows a band of small dispersion. less than 1.75" C.,extending across the CalCOFI region in a meridional
REPORTS VOLUME XI, 1 JULY 1983 TO 30 JUNE 1966 163110.110. IIPISALINITY STANDARD DEVIATION. COEFF IClENT OF CORRELATION.TEMPERATUREF ZP1 mI2P120. IIY llPFIGURE 6. Standord deviation of salinity about the 13-yeor mean(*%). Interval: 0.05%.distribution. Areas of large gradient coincide withareas of large dispersion, and areas of small gradientwith areas of small dispersion. This circumstanceprobably results from a large ratio of nonseasonal(random) to seasonal variation in the salinity record.The increase in standard deviation near the westernedge of the CalCOFI region is not well establishedbut it corresponds to relatively large salinity gradientsseen in charts for the North Pacific Ocean.COEFFICIENT OF CORRELATION AND MEANRANGE: TEMPERATUREThe coefficients of correlation for temperature andsalinity are measures of the degree of relation betweenthe characteristics and time of year.6The correlation of temperature with time of year(Figure 7) has a coefficient greater than 0.80 overthe greater portion of the CalCOFI region. The coefficientis greater than 0.85 along the western extentand in the southern half including the coastal regionalong southern Baja California. Coefficients aresmaller in the upwelling regions-in a broad bandalong central California and in a narrow band fromPoint Vincente to Bahia de Sebastian Vizcaino. Smallvariance explained by regression curveeR= (total variance>"where R is the coefficient OP correlation.FIGURE 7. Coefficient of correlation for tempemture. Interval: 0.1.coeEcients are caused either by large total variance,consequent on the sporadic nature of upwelling, orby small explained variance that results when effectsof upwelling are out of phase with the solar heatingcoolingcycle dominant elsewhere. A mixture of theseeffects is probable.The P-ratio test wm applied to the regression ofthe annual harmonic only.s Where the null hypothesisis rejected at the 2.5 percent significance levelthe seasonal variation may be considered significant.The seasonal variation of temperature is everywheresignificant.An additional test, attributed to Btumph by Conradand Pollak (1950), was applied to 12 representativestations. The probability p that an amplitudeA might have been obtained by harmonic analysisof a particular set of random numbers is given by:- A2p = exp nexplained variance7J-Z (oneanlained variance) weighted by degrees of freedom. ThedL&eii-of-ireedomeedom are determined by the number of variablesin the regression equation and the sampling frequency.a Van Vliet and Anderson found by the F-ratio test that. the semiannualharmonic signincantly increases the explained variancein five of their-six stations. A plication of this test tothe semiannual harmonics of the Cal8OFI records is marglnaEin value because the number of data in each record is small.
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STATE OF CALIFORNIAMARINE RESEARCH
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STATE OF CALIFORNIADEPARTMENT OF FI
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RONALD REAGAXGovcriwr of the Slate
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PART 1REVIEW OF ACTIVITIESJuly 1,19
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REPORTS YOLUAIE SI, 1 JULY 1963 TO
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REPORTS VOLUNE XI, 1 JULY 1963 TO 3
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REPORTS YOLUME SI, 1 JULY 1963 TO 3
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REPORTS VOLUME XI, 1 JULY 1963 TO 3
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REPORTS vor,uiwIi; SI, 1 JULY 1063
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REPORTS TOT2T71\IF: SI, 1 JUJIT 196
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IiEPOHTS TOLUME XI, 1 JULY 1963 TO
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REVIEW OF THE PELAGIC WET FISHERIES
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KEI'OiiTH TOLUJIE SI, 1 JULY 1963 T
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PART IISYMPOSIUM ON ANCHOVIES, GENU
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OCEANIC ENVIRONMENTS OF THE GENUS E
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KEI'OKTS VOLIXI.: SI, 1 JULY 1963 T
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~~~REPORTS VOLUME XI, 1 JULY 1963 T
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REPORTS VOLUME SI, 1 JULY 1963 TO 3
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130'E 132' 134' 136' 138' 140' 142-
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REPORTS VOLUSIE SI, 1 JULY 1963 TO
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KI3I’ORTH VOLUJIE XI, 1 JULY 1963
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REPORTS VOLUME SI, 1 JULY 1963 TO 3
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REPORTS VOLUIIE SI. 1 JULY 1963 TO
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REPORTS T’OLUME XI, 1 JULY 1963 T
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INFLUENCE OF SOME ENVIRONMENTAL FAC
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REPORTS Y‘OLUJIE XI, 1 JULY 1963
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~table shows the values calculated
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ateREPORTS T-OLTJIT", SI, 1 JULl 19
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REPORTS POLGNE SI, 1 JU LY 1963 TO
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REPORTS VOLUXE XI, 1 JULY 1963 TO 3
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_________--_____REPORTS VOLUJIE SI,
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REPORTS TOLTIJIE SI, 1 JULY 1963 TO
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-20/5-0 10-f 5-w 25-0 20-= 15-: 10-
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REPORTS VOLUNE SI. 1 JULY 19G3 TO 3
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REPORTS VOLURlE SI, 1 JULY 1963 TO
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THE PREDATION OF GUANO BIRDS ON THE
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iod and after 8 AM during the rest
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Page 113 and 114: REPORTS VOLUME XI, 1 JULY 1963 TO 3
Page 115 and 116: FISH E RYThe California anchovy fis
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Page 119: CO-OCCURRENCES OF SARDINE AND ANCHO
Page 122 and 123: 120 CALIFORNIA COOPERATIVE OCEANIC
Page 124 and 125: CALIFORNIA COOPERATIVE OCEANlC FISH
Page 128 and 129: 126CALIFORNIB COOPERATIVE OCEANIC F
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Page 138 and 139: THE ACCUMULATION OF FISH DEBRIS IN
Page 143 and 144: PART IllSCIENTIFIC CONTRIBUTIONS
Page 147 and 148: REPORTS VOLUME SI, 1 JULY 1963 TO 3
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Page 157 and 158: SUMMARY OF THERMAL CONDITIONS AND P
Page 159 and 160: SEASONAL VARIATION OF TEMPERATURE A
Page 163: including the semiannual harmonic?
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Page 186 and 187: 184CALIFORNIA COOPERATIVE OCEANIC F
Page 190: CONTENTSI. Review of Activities Pag
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