A station at an altitude of 900 metres above sea level measures an air pressure of 930 hPa. Under normal conditions, which of the following values give the most realistic sea-level pressure for this station?

Question

Quizplus · Accepted Answer

The atmospheric pressure decreases with altitude, and one can estimate the sea-level pressure using the barometric formula. Assuming a standard atmosphere, the sea-level pressure for this station is approximately 1020 hPa. Therefore, choice C is the most realistic value compared to the given pressure of 930 hPa at an altitude of 900 metres. The other choices (A, B, and D) are either too low or too high to represent the sea-level pressure at this station.

A Station at an Altitude of 900 Metres Above Sea