INVESTIGATION OF TEMPERATURE FLUCTUATIONS NEAR THE AIR-SEA INTERFACE.
NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
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Measurements of air temperature fluctuations as close as 2.5 cm above the surface of a pond in the presence of wind generated waves were made. Fast response thermistors were used, one at constant absolute height and one mounted on a styrofoam float. Data were collected on an Ampex CP-100 tape recorder using FM record amplifiers and a tape speed of 1 and 78 ips. The data were digitized by an SDS-9300 hybrid computer and analyzed by an IBM 36067 digital computer. Temperature fluctuations as large as 5C in as little as 0.2 seconds were observed with the float mounted thermistor. There was strong correlation between the fixed and floating thermistor readings, with the fluctuation amplitude of the floating thermistor being more than three times larger than the fluctuation amplitude for the fixed thermistor. This ratio decreased when the height of the float mounted thermistor was raised. The large fluctuations measured by the floating thermistor are believed to be caused by the vertical motion of the thermistor in a large vertical temperature gradient immediately above the sea surface. More detailed instrumentation is needed to confirm this hypothesis. Author