Abstract
Fluctuations in heat energy transfer between ocean and atmosphere were studied by means of spectral analysis of time series. The hydrometeorological parameters which contribute to the interface heat transfer were analyzed similarly. Data consisted of three years of 3-hourly surface observations at North Atlantic stations Charlie and Delta. Frequency domain results were emphasized, but time domain statistics were also examined. Time series of different length and timestep were analyzed. Time sequence of 4-month or 2-month autospectra gave the spectral field of a variable during the three years. Spectral fields of energy transfer were compared to spectral fields of the contributing variables. Spectral properties of heat transfer in the time range studied (6 hours to 20 days) are mainly governed by fluctuations of corresponding vertical gradient. However, some secondary maxima in the transfer spectral fields are chiefly induced by wind fluctuations. The bulk of the heat transfer occurs in intermittent pulsations.
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