Wind envelope at 300 hPa in the Southern Hemisphere during austral summer between 1979-2020

The datasets contain wind envelope data at 300 hPa from the Southern hemisphere during austral summer (December-March) between 1979-2020. The envelope was obtained using the methodology of Zimin et al 2003, retaining only the local zonal wavenumbers correspondant to the southern hemisphere transients (Trenberth 1981)  using datasets of meridional wind speed at 300 hPa from ERA-5 and NCEP DOE 2 reanalysis .The resolution of both datasets is 2.5º x 2.5º with daily frequency.