The Atmosphere Flashcards
What is the ISA height of the tropopause?
11km or 36,000ft
What is the ISA lapse rate for the troposphere?
-2 degrees per 1000ft or -6.5 degrees per 1km
What is the temperature lapse rate in the lower stratosphere?
0 degrees between 11km and 20km
Isothermal
What is the main composition of the atmosphere?
Nitrogen 78%, Oxygen 21% and other gases 1%
How much of the earths water vapour is found in the troposphere? And where is half of its mass?
99% and below 2km
ISA temperature above 36,000ft or 11km?
-56.5 degrees
Height and temperature of the tropopause in polar regions
8-10km and -40/-50 degrees
Height and temperature of the tropopause in equatorial regions
16-18km and -70/-90 degrees
What level is the ozone layer?
20-30km
Why is it good to fly in the stratosphere?
Cloud formation is rare
Above the hazards of the troposphere (Cb)
Turbulence is still possible
What are the dangers of Ozone?
Extremely corrosive gas
Can cause possible respiratory problems
ISA temperature at MSL
+15 degrees
ISA pressure at MSL in hPa and InHg
1013.25hPa 29.92InHg
ISA density at MSL
1.225Kg/m^3
ISA pressure at 5,000ft
850hPa
ISA pressure at 10,000ft
700hPa
ISA pressure at 14,000ft
600hPa
ISA pressure at 18,000ft
500hPa or approximately half of the value at MSL
ISA pressure at 24,000ft
400hPa
ISA pressure at 30,000ft
300hPa
ISA pressure at 34,000ft
250hPa or approximately a quarter of the pressure at MSL
ISA pressure at 39,000ft
200hPa
ISA pressure at 45,000ft
150hPa
What is ISA temperature deviation?
The difference between the ISA temperature and the actual conditions
What is the ISA pressure lapse rate below 10,000ft?
1hPa per 30ft
ISA density at 22,000ft
Approximately half of the value at MSL
ISA density at 40,000ft
Approximately a quarter of the value at MSL
