Spectral Analysis on the Variability of Surface Pressure and Wind on Mars: Viking Lander 2 Observations Revisited

In this work, we analyze the meteorological data sets of pressure and wind velocity vector components, recorded by instruments onboard the Viking Lander 2, evolving from summer to winter Martian solstices provided by the Viking Meteorology Experiment Team. We performed a multiscale signal analysis based on a gaped wavelet transform technique. Even in the presence of data gaps, it is possible to highlight new features related to the non-stationary behaviour in the data. The main peaks of the common spectral scales found in the global wavelet spectrum for the pressure range from 0.2, 0.5, 1, 7 to 593.6 SOLS. The same occurs for the zonal wind data, the values ranging from 0.5,1 to 593.6 SOLS. The meridional wind has periods from 0.5 to 381 SOLS. The correlation signatures between pressure and wind show significant similarities. However, by the analysis of the phase angles, it was found that the variables are not always in phase correspondence. (AU)