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The International Civil Aviation Organizintion (ICAO) Standard Atmosphere gives the average values for meteorological element at 40°N from mean sea level (MSL) to 80km (262,500 ft).
The ICAO Standard Atmosphere does not contain water vapour
Some of the values defined by ICAO are:

'ICAO Standard Atmosphere'

Height km & ft	Temperature °C	Pressure hPa	Lapse Rate °C/1000ft
0km MSL	15.0	1013.25	1.98 (Tropospheric)
11km 36,000ft	-56.5	226.00	0.00 (Stratospheric)
20km 65,000ft	-56.5	54.70	-1.00 (Stratospheric)
32km 105,000ft	-44.5	8.68

As this is a Standard, you will never encounter these conditions outside of a laboratory, but many Aviation standards and flying rules are based on this, altimetry being a major one. The standard is very useful in Meteorology for comparing actual values to.

Contents

See also

External links

Sources

References

See also

★ International Standard Atmosphere

External links

★ ICAO atmosphere calculator

★ ICAO Standards

Sources

★ ICAO Standard Atmosphere Table

★ NASA JPL Reference Notes

References

★ ICAO, ''Manual of the ICAO Standard Atmosphere (extended to 80 kilometres (262 500 feet))'', Doc 7488-CD, Third Edition, 1993, ISBN 92-9194-004-6.