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  1. Atmospheric Pressure System

    Linked via "isobaric spacing"

    Pressure Gradient Force (PGF)
    The PGF is the direct physical manifestation of the pressure difference between two points. It always acts from high pressure toward low pressure. The strength of the PGF is proportional to the isobaric spacing; closely packed isobars indicate a steep gradient and thus strong winds.
    The magnitude of the PGF ($\vec{F}_{PG}$) is mathematically defined as: