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

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~ MEANE64CALIFORNIA COOPERATIVE OCEANIC FISHERIES INVESTIGATIONSwhere ai is the amplitude computed from the ith cycleof the period concerned and n is the number of intervalsof this period in the series. At all stations testedthe probability computed with the annual harmonic oftemperature is inconsequential (Table 1).The distribution of temperature range, maximumof regression curve less miairnum (Figure 8), closelyreflects the distribution d standard deviation. Themajor exception is in the region of low correlationTABLE 1PROBABILITY THAT AN AMPLITUDE (ANNUAL HARMONIC) ASGREAT AS THAT CALCULATED MIGHT HAVE BEEN OBTAINEDBY HARMONIC ANALYSIS OF PARTICULAR SETOF RANDOM NUMBERSt .o.1Y-w-27-Station 1 Temperature 1 salinity0.170.840.393 x 10-80.027 x 10-40.224 x 10-40.035 x lo-'0.882 x lo-'ML*wC'M : I regression CYVE marimum ICU3minimum) ~_.........--cl.TSEASONAL TEMPERATURE RANGE-F.f12-FIGURE 8. Mean reaaanal temperature range which is defined as theregression curve maximum less the minimum. Interval: 1" C.along the coast of southern California-northern BajaCalifornia. Here the standard deviation increases tothe coast, whereas the seasonal range reaches a maximum20 to 40 miles offshore.Temperature range is less than 3.0 "C. in thenorthern California upwelling region. The band ofsmall range is defined by the 3.5" C. isotherms, andhas flanking areas greater than 4.0" C. The isolatedarea with range greater than 5.0" C. off San Diegocoincides with the warm tongue seen in the meandistribution. Temperature range exceeds 5.0 "C. inBahia de Sebastian Vizcaino and south of PuntaEugenia, increasing to greater than 10.0 OC. alongthe coast of southern Baja California.The chart of temperature range is grossly similarto range charts of the North Pacific Ocean (e.g.Reid, 1962). Considerable detail has been added bythe present analysis. Robinson (1957) prepared achart of surface-temperature range for the northeasternPacific Ocean from a comprehensive study ofbathythermograph records (and of some serial hydrographicdata). Her chart (her Figure 44) overlapsthe present coverage north of 35" N. latitudeand shows the band of small range displaced offshoreat the latitude of San Francisco. Her values are generallygreater by 1.5" C. to 2.0 "C. Closer examinationhas revealed that most of the differences betweenthe range charts are caused by differences inthe determination of the seasonal temperature maxima.During the period of heat gain in the regionwhere the coverage of the charts overlap the temperatureof the surface layer may occasionally exceedthat at 10 meters by more than 1" C. This differencemay result from warming of newly upwelled wateror warming of water with shallow density stratificationcaused by river and bay effluent.Wyrtki (1964) prepared a ehart of surface-temperaturerange for the eastern Pacific Ocean, 30" N.to 40" S. His chart is similar except in a narrow bandalong southern Baja California. In this region hedid not find the range to exceed 7" C. The presentanalysis finds lower temperatures at the temperatureminimum.COEFFICIENT OF CORRELATION AND MEANRANGE: SALINITYThe correlation coefficient for salinity (Figure 9)ranges from nominally zero to slightly greater than0.70. There is a series of lobes having coefficientsgreater than 0.40. Only off southern Baja Californiaare there any values greater than 0.60. The generallylow values indicate that the nonseasonal variationsdominate much of the salinity record.The shaded areas show where the null hypothesis ofthe P-ratio is rejected at the 2.5-percent significancelevel. These areas of significant seasonal variationusually coincide with the areas having correlationcoefficients greater than 0.40. The exception to thisobservation occurs north of 34" N. latitude wherethe sampli,ng was less frequent. The probability com-
REPORTS VOiLUME XI, 1 JULY 1983 TO 30 JUNE 1966 165.......................SALINITY%L,c,w: MEAN SEASONAL SALINITY RAN6E: (rapreiiion curve maximum lass minimum 135- -w-w-E mb125. IPG- m- 110.FIGURE 9. Coefficient of correlation for salinity. Interval: 0.2. Withinthe shaded areas the F-ratio is greater than the 2.5 percent significancelevel.plated by Shmph’s test for the salinity harmonicsshow large differences (Table 1). The tame concluionaaxe drawn from this test as from the coeflcirntof wrrelation and P-ratio; the seasonal variation ofsalinity is real but small in comparison to nonseasonalfluctuations. Some areas need more frequent samplingto demonstrate a sipficant seasonal trend.The distribution of the range of mean salinity(maximum of regression curve less minimum, Figurelo), reflects that of correlation coefficient and standarddeviation, especially the former. Three majorregions have a range greater than 0.20/00 ; two of themhave ranges greater than 0.4%0. The maximum rangecontour, 0.7%0, is centered 100 miles offshore fromsouthern Baja California. This maximum containsmost of the stations which have a range equivalentto two standard deviations or more. The other regionof range greater than 0.4%0 is found near San FranciscoBay. The shore station at S.E. Farallon Islandwhich includes data for only 5 years, 1957-62, hasa range of 0.9%0. This station exhibits an abruptminimum in March coinciding with the peak digchargesof the Sacramento and San Joaquin Rivers.The nearby CalCOFI stations were infrequently sampledin this month and thus may have produced anFIGURE 10. Mean seasonal salinity range which is defined as the regressioncurve maximum leas the minimum. Interval: 0.2%.abbreviated range. On the other hand, the range atthe shore station was increased because samples weretaken at the sea surface.The range along northern Baja California ia small;only one upwelling station (100.29) has a rangegreater than 0.2%0. Twenty miles offshore is a bandof especially small salinity range. This band alsodisplays an extremely small coefficient of correlation.SHORE STATIONSSome of the results of the analyses of data fromshore stations are similar to those for local hydrographicstations. Results for Blunt’s Reef station appearto be consistent with an extrapolation of moresoutherly results. The temperature analysis at S.E.Farallon Island is identical to that of neighboringCalCOFI stations. The salinity analysis for the samestation (only 5 years of record) gave greater deviation,range, and correlation. The other shore stationshave slightly smaller deviations and greater correlationcoefficients than neighboring CalCOFI stations.These results may be caused by the filtering processof using monthly averages as shore station input data.The ranges did not differ among these stations.
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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 115 and 116: FISH E RYThe California anchovy fis
Page 117 and 118: ~~ ::REPORTS VOLUME XI, 1 JULY 1963
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 145 and 146: REPORTS VOLUME XI, 1 JULY 1963 TO 3
Page 147 and 148: REPORTS VOLUME SI, 1 JULY 1963 TO 3
Page 151 and 152: REPORTS VOLU&IE XI, 1 JULY 1963 TO
Page 157 and 158: SUMMARY OF THERMAL CONDITIONS AND P
Page 159 and 160: SEASONAL VARIATION OF TEMPERATURE A
Page 163 and 164: including the semiannual harmonic?
Page 165: REPORTS VOLUME XI, 1 JULY 1983 TO 3
Page 169: REPORTS VOLUME XI, 1 JULY 1963 TO 3
Page 172 and 173: 170 CALIFORNIA COOPERATIVE OCWIC FI
Page 174 and 175: 172 CALIFORNIA COOPERATIVE OCBANIC
Page 186 and 187: 184CALIFORNIA COOPERATIVE OCEANIC F
Page 190: CONTENTSI. Review of Activities Pag
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