meteology Flashcards
what is jet steam ?
it is a narrow bands of storing wind blowing from West to East that from different air mass
- polar jet(strongest jest steam)23000-39000ft 60N S
what is cold front ?
cold front is a boundary between actively moving cold air mass and displacing warm air mass
cumuliform clouds is formed and develop cumulonimbus
what is cumulonimbus ?
clouds of vertical development
Associated with dangerous weather like thunderstorms wind shear
can reach 60000ft, pilot needs deviate the aircraft
what is thunderstorm ?
thunderstorm is formed with unstable air, high moisture and updraft agency
also it develop in three stages Initial stage, mature stage and dissipating stage.
initial stage
-strong and continuos updraft and cumuliform cloud is formed
mature stage
- updraft develop to height and start rain and hail
Dissipating Stage
-air is not heat and therefore no updrafts to keep the storm going
what is ISA?
is a standard atmosphere of dry air at mean sea level.
assuming that
pressure is 1013.25 hap
density is 1225 gram
temp 15 degree
temp lapse rate is decreasing 1.98 degree pre 1000ft
how does cloud form?
requirements for cloud formation are high moisture air, presence of condensation of nuclei and cooling of air
cloud formed when moist air forced to rise and cool adiabatically to a temp below dew point.
what is typhoon
typhoon is a intensive low pressure system it form at ocean which is providing enough moisture and also 26 degree
and corollas force
What is monsoon?
Sessional wind formed by pressure differential between land and sea
What is fog?
Is stratus cloud, in contact with ground. Affect visibility of flying
what is ITCZ
inter tropical convergence zone, it s a region that circle the earth near the equator. the intense sun and warm of the equator
define pressure gradient
the rate of change in pressure with horizontal distance between a high and low pressure area is called pressure gradient.
