Effects of weather upon the Effects of weather upon the thermal structure of the ocean. Progress report no. 1 effectsofweather00unit Year: 1952 14 15 16 17 18 19 20 21 22 FIGURE 18. VARIATION OF THE DEPTH OF THE THERMOCUNE WITH TIME AT WEATHER SHIP DELTA, 44°N.,4I°W., 1-22 AUGUST 1950. layer should form. Since the wave motion observed does not con- form to this description, some obher factor must be at work. In an attempt to discover if a 29-day lunar variation in the thermocline exists, the most complete set of daily BT obser- vations available for one year was plotted. These data were for
Effects of weather upon the Effects of weather upon the thermal structure of the ocean. Progress report no. 1 effectsofweather00unit Year: 1952 14 15 16 17 18 19 20 21 22 FIGURE 18. VARIATION OF THE DEPTH OF THE THERMOCUNE WITH TIME AT WEATHER SHIP DELTA, 44°N.,4I°W., 1-22 AUGUST 1950. layer should form. Since the wave motion observed does not con- form to this description, some obher factor must be at work. In an attempt to discover if a 29-day lunar variation in the thermocline exists, the most complete set of daily BT obser- vations available for one year was plotted. These data were for the year 19I+.8 at the Pacific weather ship NECTAR. An attempt was made to eliminate the shorter period variations by plotting the mean value for each day rather than each single observation. This method was not successful because too many days had only one or two observations instead of the expected six; consequent- ly, it was impossible to tell in which phase of the daily oscil- lation this single observation was taken. Since short period variations still appeared on the curve, a regression curve was computed to eliminate them, as shown in figure 19. In this graph the seasonal variation already discussed is apparent and, In addition, a suggestion of ridges and troughs appears in the 41
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