Spectral and Cross-spectral Analysis of Weather Patterns: An Applied Perspective
Keywords:
Spectral Analysis, Cross-spectral Analysis, Stationary, Cross Power Spectral Density, Cospectral Density, Cross Amplitude, Phase Spectrum, Gain, Coherency, Quadrature Spectrum.Abstract
In this work, four time series, representing the average monthly maximum and minimum temperatures of the two Western cities of Sudan; Nyala and Al Fasher, are studied through the use of Frequency Domain Analysis. After checking for stationary level of all of the time series, a spectral analysis is carried out, to explore and shed light on any presence of cyclical patterns in the series. Cross-spectral Analysis is used as well, to examine and reveal any linear relationships between the different temperature series.
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