What is the atmospheric pressure at one thousand meters?

1000 meters

The known surface atmospheric pressure is 101325 pa.

The atmospheric pressure decreases by 100Pa for every 10m of elevation.

So the pressure difference with the surface at 1000 meters is: 1000/10*100=10000pa.

So the atmospheric pressure at 1000 meters: 101300-1000=91300pa.

Extended information:

Factors affecting atmospheric pressure

The magnitude of atmospheric pressure is related to altitude, atmospheric temperature, atmospheric density, etc. Generally, it increases exponentially with altitude. The law decreases. There are diurnal and annual variations in air pressure. During the year, the air pressure is higher in winter than in summer. During the day, the air pressure has a maximum value and a minimum value, which appear at 9 to 10 o'clock and 15 to 16 o'clock respectively. There is also a second highest value and a second low value, which appears at 21 to 22 o'clock and 3 to 4 o'clock respectively. .

The daily variation in air pressure is small, generally 0.1 to 0.4 kPa, and decreases with increasing latitude. Changes in air pressure are closely related to wind and weather conditions, and are therefore important meteorological factors.

The commonly used air pressure units are Pascal (Pa), millimeters of mercury column height (mm·Hg), and millibars (mb). The conversion relationship between them is: 100 Pa = 1 millibar ≈ 3/4 mm mercury column height. Commonly used instruments for measuring air pressure in meteorological observations include mercury barometers, empty box barometers, and barometers. The pressure at the height of a vertical mercury column of 760 mm when the temperature is 0°C. The standard atmospheric pressure was first measured by Italian scientist Torricelli.

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