The practice or science of recording atmospheric pressure continuously using a barometrograph or similar instrument.
From barometer + -graphy (Greek graphia 'writing/recording'). The -graphy suffix describes a field of study or method of recording, following the same pattern as photography and seismography.
Before computers and satellites, meteorologists relied on networks of barometrographs scattered across the world to share pressure data by telegraph—this distributed observation system was basically the 19th-century version of global data sharing.
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