FLUCTUATIONS AND SPECTRAL ANALYSIS OF CLIMATIC VARIABLES IN SALVADOR, BAHIA, BRAZIL

Resumo

ABSTRACT. We study here the periodicity of precipitation, average temperature, pressure, humidity, solar radiation, minimum temperature, maximum temperature and evaporation in the city of Salvador, Bahia, Brazil. The available time series have monthly samples during a period of 30 years, thus resulting in 360 samples. The study is mainly done through spectral analysis, which is an important set of tools for the description of periodic phenomena.  The spectral analysis indicates a strong trend for the year basis variation (1 cycle per year) for all eight variables. The six month component (2 cycles per year) is also strong in all cases.