EMH
Diamond Member
- Apr 5, 2021
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There are many local SAP measurements.
There is no "Earth SAP".
YES THERE IS down to 6 digits and it hasn't changed.
Earth's average surface air pressure at sea level is 1013.25 millibars (hPa), which is equal to 1 atmosphere (atm) or 14.7 pounds per square inch. This pressure changes with altitude, temperature, and weather systems, but the standard sea level value is a baseline for measurements.