Spectra of surface atmospheric quantities at ocean weathership P

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Abstract
Ten years of surface weather data from Ocean Weather Station P were subjected to spectral analysis. The wind speed and air pressure auto‐spectra reveal large variations at synoptic periods while the auto‐spectra of the sea temperature, air temperature and absolute humidity are dominated by the annual variations. The rotary auto‐spectrum of the wind features a broad peak of activity centered at a period of 3 days. In addition, the spectra of quantities representative of the wind stress and sensible and latent heat fluxes are discussed. Spectra of these surface weather quantities computed for each season show that the activity changes both with respect to the size and frequency of the variations during the course of a year. The cross‐spectra between selected pairs of quantities were also computed and are discussed.

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