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.
The International Standard Atmosphere (ISA) is a model of the standard variation of pressure, temperature, density, and viscosity with altitude in the Earths atmosphere. ...
Feeds |
Contact