Atmospheric processes with a representative scale (large-scale) of 10,000 kilometers (6,200 miles); in meteorology, it is a scale in which the curve of the earth is not negligible; the large-scale atmospheric flows are essentially nearly hydrostatic, nearly geostrophic and wave-like in appearance; they exist mainly in response to the latitudinal differences in radiative heating, to the particular value of the Coriolis force and to the spatial distribution of the oceans and continents.
NSIDC Cryosphere glossary - https://nsidc.org/cryosphere/glossary/L