Meteo 2
T2b
T2b
The Bora is
A Foehn wind occurs on the
What approximately is the average height of the tropopause over teh equator?
In the troposphere the decrease of pressure per 100m in height
What is the approximate vertical interval which is equal to a pressure change of 1 hPa at an altitude of 5500 m?
Half the mass of the atmosphere is found in the first
What characteristics is associated with a temperature inversions ?
The station pressure used in surface weather charts is
The average height of the tropopause at 50 N is about?
The ELR is an actual atmosphere
A significant inversion at low height is a characteristics of
A wide body takes off on a clear night in Saudi Arabien. SHortly after T/O teh aircraft's rate of climb drops to zero. This can be due to
Deifne the tropopause:
Hohe Tropopause
11 km bis ca. 20 km
4 Tropoausen
1) Polar Tropoause= 8km = -50 degrees
2) Suvtropial = 11 km = -56,5 Grad
3) Equatorial 16km = -70 degrees
4) WInter: Artic = 6-7 km = -45 degrees
During a flight at Fl 100 from Marseille (QNH 1012 hPa) to Palma de Mallorca (QNH 1015 hPa) an aircraft remains at a constantvtrue altitude. The resonon for this is that:
During a flight over the sea at FL 135 the True Altitude is 13'500 ft: local QNH is 1019 hPa. What information, if any, can be gaines about the air mass in which the aircraft is flying ?
AN aircrafr is flying over teh sea at Fl 90; the true altitude is 9100 ft; local QNH is unkown. What assumption, if any, can be made about the air mass in which the aircraft is flying??
When flying at FL 180 in teh Northern Gemisphere you experience a right drift:
What can you exceed at FL 180, when te wind is geostrophic and your true altitude is 18'000 ft?
radiation fog
Einstrahlung fehlt = absence id dorrest solar radiation (night time)
Haze
consists of solid participles look smoke dust etc. => rel. humidity below 80%
Surface wind
Wind at 10 meters above ground level
On weather charts, which north is ment ?
teh geographic north ==> only the tower magnetic north => rwy related to magnetic north
gusts are reported when
gust speed over 10 its
Wind is measured at which high?
10 m above ground
15 m/s in knots
30 knots
Wie wirk die pressure gradient force
senkrecht zu dem isobars richtichtung Tief
centrifugal force
is proportional to the square of the speed => point outward
Fricton force direction?
Opposite to the wind direction => increases with surface roughness
Which wind force does not depend on teh wind speed?
the pressure gradient force causes the wind but does not depend on the wind speed ==> only force capable of putting an atmosphere at rest into motion
Where is the Coriolis force zero?
Äquator
Eulerian wind
the pressure gradient force accelerates the air into the direction of G from high pressure to low pressure
Wann wird die Corioliskraft wichtig?
above 100 km
Geostrophic wind?
Pressure gradient Force beginnt mit der Bewegung der Luft. Sobald sie sich bewegt, kommt die Corioliskraft ==> gleichen sich aus und resultierende Kraft = geostrophic wind
the closer the isobaren, desto
stronger der Wind
Friction wind: over water
speed: 70 % Abweichung 10 Grad
Friction wind: over land
speed: 50% Abweichung 30 Grad nach links vom geostrophic wind
In unstable air, what happens with the fricton wind?
wird in höhere Höhen getragen
wann ist die Luft am instabilsten?
Kurz nach dem Mittag => ground temp. is at the maximum
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Cartes-fiches
Deifne the tropopause:
Hohe Tropopause
11 km bis ca. 20 km
4 Tropoausen
1) Polar Tropoause= 8km = -50 degrees
2) Suvtropial = 11 km = -56,5 Grad
3) Equatorial 16km = -70 degrees
4) WInter: Artic = 6-7 km = -45 degrees
During a flight at Fl 100 from Marseille (QNH 1012 hPa) to Palma de Mallorca (QNH 1015 hPa) an aircraft remains at a constantvtrue altitude. The resonon for this is that:
During a flight over the sea at FL 135 the True Altitude is 13'500 ft: local QNH is 1019 hPa. What information, if any, can be gaines about the air mass in which the aircraft is flying ?
AN aircrafr is flying over teh sea at Fl 90; the true altitude is 9100 ft; local QNH is unkown. What assumption, if any, can be made about the air mass in which the aircraft is flying??
When flying at FL 180 in teh Northern Gemisphere you experience a right drift:
What can you exceed at FL 180, when te wind is geostrophic and your true altitude is 18'000 ft?
