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MyMET > The Atmosphere > Flashcards

The Atmosphere Flashcards

1
Q

What is the ISA height of the tropopause?

A

11km or 36,000ft

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2
Q

What is the ISA lapse rate for the troposphere?

A

-2 degrees per 1000ft or -6.5 degrees per 1km

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3
Q

What is the temperature lapse rate in the lower stratosphere?

A

0 degrees between 11km and 20km

Isothermal

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4
Q

What is the main composition of the atmosphere?

A

Nitrogen 78%, Oxygen 21% and other gases 1%

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5
Q

How much of the earths water vapour is found in the troposphere? And where is half of its mass?

A

99% and below 2km

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6
Q

ISA temperature above 36,000ft or 11km?

A

-56.5 degrees

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7
Q

Height and temperature of the tropopause in polar regions

A

8-10km and -40/-50 degrees

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8
Q

Height and temperature of the tropopause in equatorial regions

A

16-18km and -70/-90 degrees

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9
Q

What level is the ozone layer?

A

20-30km

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10
Q

Why is it good to fly in the stratosphere?

A

Cloud formation is rare
Above the hazards of the troposphere (Cb)
Turbulence is still possible

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11
Q

What are the dangers of Ozone?

A

Extremely corrosive gas

Can cause possible respiratory problems

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12
Q

ISA temperature at MSL

A

+15 degrees

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13
Q

ISA pressure at MSL in hPa and InHg

A

1013.25hPa 29.92InHg

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14
Q

ISA density at MSL

A

1.225Kg/m^3

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15
Q

ISA pressure at 5,000ft

A

850hPa

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16
Q

ISA pressure at 10,000ft

A

700hPa

17
Q

ISA pressure at 14,000ft

A

600hPa

18
Q

ISA pressure at 18,000ft

A

500hPa or approximately half of the value at MSL

19
Q

ISA pressure at 24,000ft

A

400hPa

20
Q

ISA pressure at 30,000ft

A

300hPa

21
Q

ISA pressure at 34,000ft

A

250hPa or approximately a quarter of the pressure at MSL

22
Q

ISA pressure at 39,000ft

A

200hPa

23
Q

ISA pressure at 45,000ft

A

150hPa

24
Q

What is ISA temperature deviation?

A

The difference between the ISA temperature and the actual conditions

25
Q

What is the ISA pressure lapse rate below 10,000ft?

A

1hPa per 30ft

26
Q

ISA density at 22,000ft

A

Approximately half of the value at MSL

27
Q

ISA density at 40,000ft

A

Approximately a quarter of the value at MSL

MyMET (22 decks)

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