Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

RDAF2315 > MET2315 > Flashcards

MET2315 Flashcards

1
Q

What is the measurement of Wind (Direction and Strenght)?

A

Degrees / Knots (kt)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the measurement of Horizontal Visability/RVR?

A

Kilometers (km) / Meters (m)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the measurement of Vertical Visability and Cloud Base?

A

Feet (ft)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the measurement of Cloud Coverage?

A

Octas (?/8)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the measurement of Pressure

A

Hectopascal (hPa)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the measurement of Temperature?

A

Degrees Celsius (C)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the measurement of Relative Humidity / Dew Point

A

Degrees Celsius (C)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the measurement of Precipitation?

A

Intensity (Light / Medium / Heavy)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the measurement of Density?

A

Gram/Kilogram per Cubic Meter (g/m3 — kg/m3)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the most upper MET institution named, and how many exists?

A

World Area Forecast Centre (WAFC) - 2- Placed in London and Washington

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What does the abbreviation “VAAC” stand for, and how many exists?

A

Volcanic Ash Advisory Centre - 9 -

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What does the abbreviation “NOTAM” stand for?

A

NOtice To AirMen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What does the abbreviation “MWO” stand for?

A

Meteorological Watch Office

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Who has the MWO responsibility in DNK FIR?

A

DMI

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What does the abbreviation “AMWO” stand for?

A

Aerodrome and Meteorological Watch Office

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is a “METAR”, and what information does it provide?

A

METAR = Meteorological Aerodrome Report
Provides:
- Wind speed/direction
- Visibility
- Weather
- Clouds
- Temperature
- Dew Point
- Atmospheric Pressure
- (Remarks)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is a “TAF”, and what information does it provide?

A

TAF = Terminal Area Forecast
Provides the same information as a METAR, and states the expected meteorological conditions at an airport during a specified period

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

How much cloud cover is present when FEW clouds are reported?

A

1-2 Octas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

How much cloud cover is present when SCT (Scattered) clouds are reported?

A

3-4 Octas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

How much cloud cover is present when BKN (Broken) clouds are reported?

A

5-7 Octas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

How much cloud cover is present when OVC (Overcast) clouds are reported?

A

8 Octas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What does the abbreviation “VV” stand for?

A

Vertical Visibility

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What conditions needs to be met, in order to have CAVOK?

A

Ceiling and Visibility OK
- Visibility is 10km or more
- No CB or TCU’s
- No Cloud below 5000ft or Minimum Sector Altitude (MSA) (Whichever is greatest)
- No significant weather at or in the vicinity of the aerodrome

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What does the abbreviation “NSC” stand for?

A

No Significant Clouds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
What does the abbreviation "AWOS" stand for?
Automated Weather Observation System
26
What equipment is used to measure Wind?
Anemometer
27
What equipment is used to measure Visibility (and RVR)?
Transmissometer Scattermeters
28
What equipment is used to measure Clouds?
Ceilometer
29
What equipment is used to measure Temperature?
Temperature Sensors
30
What equipment is used to measure Dew Point?
Hygrometer
31
What equipment is used to measure Atmospheric Pressure?
Pressure Sensors Barometers
32
What is a Weather Radar used for?
To locate precipitation, calculate its motion and estimate its type and intensity
33
What does the abbreviation "AFTN" stand for?
Aeronautical Fixed Telecommunication Network
34
What are the three states, in which water occurs?
Solid Liquid Vapour
35
How many "Spheres" exists, and what are they named?
5 - Troposphere - Stratosphere - Mesosphere - Thermosphere - Exosphere
36
What is characterised by a "pause"? (opposing a "sphere")
A "pause" is present when the temperature remains the same in a height band
37
What is characterised in the Troposphere?
The Troposphere contains 99% of all our waters (Airborne)
38
Is the Troposhere is perfect circle? If yes, why, if no, why not?
No, the Troposphere is Oval - This is because, the warm air around ecuator has a lower density, and therefore is bigger by volume than the colder air at the poles.
39
What is characterised in the troposphere, with regards to temperature?
The Temperature decreases
40
What is characterised in the stratosphere, with regards to temperature, and why?
The Temperature increases, because the OZON in the statosphere absorbs some of the suns radiation
41
What are the 5 things we measure in the atmosphere?
Temperature Pressure Wind Humidity Density
42
What is QNH?
Qurry Nautical Height The atmospheric pressure at Mean Sea Level (MSL) INDICATED ALTITUDE
43
What is QFE?
Qurry Field Elevation The atmospheric pressure at the aerodrome/airport INDICATED HEIGHT
44
What is the equation of Pressure?
Pressure = Depth * Density
45
At which heights and by how many feet, does the atmospheric pressure decrease with 1 hPa
1 hPa = 100ft at 40.000ft - up 1 hPa = 50ft at 20.000ft - 40.000ft 1 hPa = 30ft at MSL - 20.000ft
46
What are the 6 ISA values?
MSL Pressure = 1013,25 hPa Base Temperature = 15 Degrees Celsius Density = 1,225kg/m3 No Water Vapour (No relative humidity) Pressure Lapse Rate = 1 hPa pr 27 ft Temperature Lapse Rate = 1,98 Degrees Celsius pr 1000 ft
47
What is the "thumb rule" in regards to converstion between Celsius and Fahrenheit and vice versa?
Celsius to Fahrenheit: Multiply the temperature by 2 and then add 30 Fahrenheit to Celsius: Subtract 30 from the temperature and divide by 2
48
What are the 3 ways of which heat is transfered within the Atmosphere?
- Radiation: Transfer of heat between bodies that are not in contact - Conduction: Transfer of heat between bodies in contact, but without movement - Convection: Transfer of heat by vertical movement
49
What is terrestrial radiation?
The lower frequency energy emitted by the earth
50
What is Diurnal variation?
Change in the air temperature that occurs from day to night. Is in direct connection with solar and terrestrial radiation
51
What is Seasonal variation?
The Earth is tilted 23.50 degrees. This influences the different hemispheres, in regard to their relative position to the sun.
52
What is Latitudinal variation?
With an increase in latitude either north or south of the equator, the temperature decreases. This is caused by a decreased amount of sunlight received at/towards the poles
53
What is Vertical Variation?
The temperature normally decreases with height increasing throughout the troposphere
54
What is an Inversion?
When the temperature increases as the height increases
55
What is an Isothermal Layer?
When the temperature remains the same, although the height is increased
56
Which METAR abbreviations are used for: - Snow - Rain - Fog - Drizzle - Thunderstorm - Volcanic Ash
- Snow = SN - Rain = RA - Fog = FG - Drizzle = DZ - Thunderstorm = TS - Volcanic Ash = VA
57
Which METAR abbreviations are used for Hail?
GR/GS GR = Hail above a certain diameter (Bigger Hail) GS = Hail below a certain diameter (Smaller Hail)
58
What METAR abbreviation are used for Mist?
BR
59
What METAR abbreviation are used for Sandstorm?
SS/DS SS = Larger Sandstorms DS = Smaller Sandstorms
60
Which METAR abbreviations are used for Ice Pellets?
PL/SG
61
What is the term used, in regards to the heat required to cause a change in state (eg. liquid water -> Water vapour)
Latent heat
62
What happens to the Relative Humidity, when the Temperature of Air increases?
The Relative Humidity decreases, as warmer air can contain a greater amount of water vapour
63
What is Saturation?
Saturation means, that the air is holding its maximum quantity of water (AKA 100% Relative Humidity) The temperature at which this occurs is also known as the "Dew Point"
64
What are the four ways, that air can be cooled below its Dew Point?
- Conduction - Evaporation - Mixing - Adiabatic Cooling
65
What happens, when the air Condensates?
The saturated air is cooled and the water vapour content will be too great, and therefore visible droplets will appear This is the process by which clouds are formed
66
What is Sublimation?
Sublimation is the transition of a substance directly from the solid state to the gas state. This occurs without passing the liquid state.
67
How is Relative Humidity defined?
Relative Humidity, is a measurement of the amount of water vapour present in the air, relative to how much is required to cause saturation at that temperature (A procentage of how much water is actually in the atmosphere, compared to how much water the atmosphere can actually hold)
68
Is the Relative Humidity higher at day or night and why?
At night. During the night, the temperature drops, which means, that the air has a lower amount of potential water vapour.
69
What factor is present, when the air is considered to be Unstable?
The air moves vertically up
70
What factor is present, when the air is considered to be Stable?
The air remains at the same level or moves down
71
What happens to airs density, as pressure decreases?
The density decreases as well
72
What happens to airs density, as temperature increases?
The density decreases
73
What happens to airs density, as moisture increases?
The density decreases
74
What is adiabatic cooling?
Adiabatic cooling happens as the box of air rises vertically. The volume of the box increases, therefore the temperature (energy) within the box decreases
75
What is adiabatic warming?
Adiabatic warming happens as the box of air falls vertically. The volume of the box decreases, therefore the temperature (energy) within the box increases
76
What is the value of Dry Adiabatic Lapse Rate?
3 degrees celsius per 1000ft
77
What is the value of Saturated Adiabatic Lapse Rate?
1,5 degrees celsius per 1000ft
78
What is ELR an abbreviation for?
Environmental Lapse Rate
79
What defines Absolute Stability?
When the ELR is less than both DALR and SALR
80
What defines Conditional Instability?
When the ELR lies between the DALR and the SALR
81
What defines Absolute Instability?
When the ELR is greater than both the SALR and DALR
82
What is frontal lifting?
When two large areas of air with markedly different temperatures meet, it's called a "front". Cold air undercuts the warmer air, forcing it to rise.
83
What is Orographic Lifting?
When geographical features (eg mountains) causes the air to rise, as it will want to pass over them What happens to the air afterwards, depends upon the stability of the air
84
What is Thermal Convergence?
The surface is heated by the sun, which warms the air, causing it to rise. The pressure at ground level drops, and air converges from the surrounding to equalise the pressure drop
85
What is Thermal Turbulence?
Produced by unequal surface heating. Most common at the boundary between land and sea, when cold air is blown from the sea over the warmer land, it causes Thermal Turbulence.
86
What is Mechanical Turbulence?
When the air hits a "rough" surface. Eg when air passes big rocks, buildings or uneven hills, the flow of the air is disturbed and causes Mechanical Turbulence The intensity depends on: - The strength of the surface wind - The stability of the air - The nature of the ground
87
What are the 3 "dangerous" H's?
- Heat - Humid - Height (Altitude)
88
How is an Air Mass defined in meteorology?
An Air Mass is a volume of air defined by its temperature and water vapour content
89
Which 6 classifications can an Air Mass have?
- Polar - Tropical - Arctic - Equatorial - Maritime - Continental
90
What is an area of High Pressure called?
Anticyclone
91
What is an area of Low Pressure called?
Cyclone / Depression
92
What is a "Wind Shear"?
A sudden change in wind direction and strength

RDAF2315 (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions