Fig. 2

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Top: the distributions of Vθ, the solar wind speed at 1 AU, as a function of heliographic latitude, θ, for 40+ years of model results. The red line shows the median, the dark-pink shaded region spans the 25–75 percentiles of the distribution (i.e., the inter-quartile range), while the light-pink regions spans 5–95 percentiles of the Vθ distribution. Panels, from left to right, show the whole dataset, solar minimum, and solar maximum periods, respectively. Bottom: the distributions of the difference in solar wind speed at a given latitude to that at the equator, i.e. V0Vθ, as a function of θ. In the same format as the top panels.

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