Meteorology Flashcards
What is an isobar
An isobar bar is a line on a meteorological chart that joins places of equal sea level pressure
What is the correct definition for the heat
Heat is a form of energy which is measured in calories
How the heat is absorbed by the earth surface
Insulation
Which are the conditions for which advection fog will be formed
Warm moist air over cold surface
When does the dirunal variation reach its maximum
Clear sky, still wind
State the correct definition of dewpoint
Dewpoint is the temperature where moist air must be cooled to reach saturation
From which of the following can the stability of the atmosphere be determined
ELR
What is DARL
It is the adiabatic temperature change for unsaturated air as it rises
How do clouds are formed
Adiabatic cooling of the rising air
Why does a Cumulus cloud have a flat base
Cu cloud has a flat base due to the uniform decrease in temperature of the DALR
The formation of the lenticular clouds is due to
Airflow rises over a mountain area and cools adiabatically on the hillside
What is the correct definition of fog
Parcels of low level air with small suspended water droplets to reduce visibility 
What is true about dewpoint temperature
Can be equal to or lower than the temperature of the air mass
Describe how radiation fog is formed
Ground calling due to radiation
Describe how frontal fog is formed
A warm air mass flowing across a colder surface
How advection fog is formed
Advection fog can occur quite suddenly at day or night, land or sea
Radiation fog rises from the surface to
800 feet
When does frost most likely occure
Frozen water cover when the earth surface has a subzero temperature
What is true about thunderstorm formation
High moisture content in the air
Describe the mature stage of the thunderstorm
Water droplets start to fall through the cloud drawing air down with them
What is the cloud type most likely to proceed a thunderstorm
Altocumulus castallanos
Which are the factors that caused the formation of the wind
Wind is a horizontal movement of air in the atmosphere by horizontal pressure difference
When does the wind is said to be veering
A veering wind is when it changes its direction in a clockwise direction
What is the pressure gradient force
A pressure gradient force acts at right angles to the isobars and is responsible for the movement of a parcel of air from high-pressure to low-pressure area
What is the geostrophic force
The geostrophic force is an apparent force that acts on a parcel of air that is moving over the rotating earth surface
What is the gradient wind
Gradient wind is the resulting wind which it blows around the curved isobars with a common circular low or high pressure patterns
What are the factors that caused the geostrophic wind to be stronger than the gradient win around a low pressure pattern
Centrifugal force opposes the gradient force
What is the correct definition of “the Bora”
It’s a cold katabatic wind that may produce violent gusts
What is true about the jet streams
Jet streams are narrow bands of high speed upper thermal wind at a very high altitudes
Where is located the core of the jetstream
At the level where temperature change is little or nil and the pressure surface is at maximum slope
What is true about the polar front of jet stream
It is located where there is little vertical temperature gradient but the horizontal pressure gradient is high enough
In which of the following conditions a fohn wind occur
Fohn wind occur when the condensation level is higher on the lee side of the hill
What are the air mass is most likely to affect Western Europe
Polar maritime and tropical maritime air
What is the weather associated with low pressure system
Frontal weather
What is the weather associated with high pressure system
Light winds
What is the gradient of a warm front
1:150
What is the gradient of cold front
1:50
