Sources: The mean daily U-wind datasets are available in the U-wind repository, NCEP-NCAR Reanalysis 1: NOAA Physical Sciences Laboratory NCEP-NCAR Reanalysis 1. In preparing the data for analysis, daily values were averaged over all longitudes. The positional data of Mars was obtained from NASA’s planetary ephemeris, https://ssd.jpl.nasa.gov/horizons/app.html.

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