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Questions and Answers
What type of fog is associated with a warm front?
What type of fog is associated with a warm front?
- Post-frontal fog
- Pre-frontal fog (correct)
- Radiation fog
- Desert fog
What is the OCDS-II example illustrating?
What is the OCDS-II example illustrating?
- Visibility Climogram
- WSCC example
- Radiation Fog Point
- OCDS-II (correct)
What does the Fog Stability Index (FSI) thresholds indicate?
What does the Fog Stability Index (FSI) thresholds indicate?
- Favorable conditions for dust advection
- Snowfall intensity limits
- Radiation fog formation likelihood (correct)
- Dust lofting wind speeds
Where can you find the Threshold dust-lofting wind speeds for different desert environments?
Where can you find the Threshold dust-lofting wind speeds for different desert environments?
What do Fog threat thresholds indicate?
What do Fog threat thresholds indicate?
What should be examined at the 850 mb level to determine the presence of a nocturnal low-level jet stream?
What should be examined at the 850 mb level to determine the presence of a nocturnal low-level jet stream?
Why are surface winds of at least 15 knots usually needed to loft dust?
Why are surface winds of at least 15 knots usually needed to loft dust?
Which wind direction in Iraq is favorable for dust lofting?
Which wind direction in Iraq is favorable for dust lofting?
When does dust generally start to settle at the surface according to the text?
When does dust generally start to settle at the surface according to the text?
Why is analyzing wind speeds at the 925 mb level important?
Why is analyzing wind speeds at the 925 mb level important?
What is often conducive to momentum transfer from aloft that can enhance surface winds?
What is often conducive to momentum transfer from aloft that can enhance surface winds?
What is the key ingredient required for dust storm generation after an appropriate source?
What is the key ingredient required for dust storm generation after an appropriate source?
What is the role of wind shear in the lofting of dust particles?
What is the role of wind shear in the lofting of dust particles?
At what range of wind speeds do the first sand and dust particles from 0.08 to 1 mm in diameter start to move?
At what range of wind speeds do the first sand and dust particles from 0.08 to 1 mm in diameter start to move?
What happens to the intensity of a dust storm even when wind speeds slow down?
What happens to the intensity of a dust storm even when wind speeds slow down?
What is one of the effects of lakes drying up on soil and plant growth?
What is one of the effects of lakes drying up on soil and plant growth?
Which natural phenomenon in southern Iraq is responsible for many dust storms in the region?
Which natural phenomenon in southern Iraq is responsible for many dust storms in the region?
What does the Pollution Trapping Index (PTI) value indicate when it is greater than -40?
What does the Pollution Trapping Index (PTI) value indicate when it is greater than -40?
How is the Pollution Trapping Index (PTI) calculated?
How is the Pollution Trapping Index (PTI) calculated?
What do the blowing snow products from GEPS and MEPS indicate?
What do the blowing snow products from GEPS and MEPS indicate?
Why could a drop in prevailing visibility from 25 miles to 15 miles be significant?
Why could a drop in prevailing visibility from 25 miles to 15 miles be significant?
What role does experience play in visibility forecasting according to the text?
What role does experience play in visibility forecasting according to the text?
Why is sector visibility mentioned as significant in visibility forecasting?
Why is sector visibility mentioned as significant in visibility forecasting?
What characteristics are important to consider when forecasting fog?
What characteristics are important to consider when forecasting fog?
Under what conditions may fog develop or intensify?
Under what conditions may fog develop or intensify?
What must be the relationship between air temperature and dew point for fog to form?
What must be the relationship between air temperature and dew point for fog to form?
What is a factor that contributes to the formation of visible cloud droplets in fog?
What is a factor that contributes to the formation of visible cloud droplets in fog?
Which of the following is NOT a characteristic important to consider when forecasting fog?
Which of the following is NOT a characteristic important to consider when forecasting fog?
What does it mean for an air mass to be supersaturated regarding fog formation?
What does it mean for an air mass to be supersaturated regarding fog formation?
Based on the text, which chart is used for contrail forecasting?
Based on the text, which chart is used for contrail forecasting?
In the context of aircraft engines, what does the Appleman chart for high-bypass and low-bypass engines refer to?
In the context of aircraft engines, what does the Appleman chart for high-bypass and low-bypass engines refer to?
What do Planck curves for black bodies represent?
What do Planck curves for black bodies represent?
Which table in the text compares the temperature of an object with its emitted energy?
Which table in the text compares the temperature of an object with its emitted energy?
Based on the text, which figure provides information on probabilities of contrail formation based on temperature and pressure level?
Based on the text, which figure provides information on probabilities of contrail formation based on temperature and pressure level?
What are the key factors influencing the duration of advected dust?
What are the key factors influencing the duration of advected dust?
Which synoptic situation may change both the wind direction and the probability of dust advecting into an area?
Which synoptic situation may change both the wind direction and the probability of dust advecting into an area?
What is a potential source of dust generation in agricultural areas?
What is a potential source of dust generation in agricultural areas?
In which type of region can dust plumes be generated in advance of cold fronts?
In which type of region can dust plumes be generated in advance of cold fronts?
What environmental condition is most prevalent in deserts where dust storms occur?
What environmental condition is most prevalent in deserts where dust storms occur?
What factor can lead to increased dust potential beyond 36 hours following a rainstorm?
What factor can lead to increased dust potential beyond 36 hours following a rainstorm?
What are the three major varieties of frontal dust storms mentioned in the text?
What are the three major varieties of frontal dust storms mentioned in the text?
What is the primary factor that distinguishes frontal dust storms from shamals?
What is the primary factor that distinguishes frontal dust storms from shamals?
In which quadrant of a jet streak is there an increase in upward vertical velocities according to the text?
In which quadrant of a jet streak is there an increase in upward vertical velocities according to the text?
What are prefrontal winds called in Saudi Arabia according to the text?
What are prefrontal winds called in Saudi Arabia according to the text?
Why are prefrontal dust storms difficult to detect in METSAT imagery?
Why are prefrontal dust storms difficult to detect in METSAT imagery?
What is the average wind speed range for prefrontal dust storms according to the text?
What is the average wind speed range for prefrontal dust storms according to the text?
What does a negative Lifted Index (LI) value (less than -2) indicate?
What does a negative Lifted Index (LI) value (less than -2) indicate?
When determining the maximum relative humidity (RH) in the 700 mb to 400 mb layer, what RH percentage is associated with precipitation aloft?
When determining the maximum relative humidity (RH) in the 700 mb to 400 mb layer, what RH percentage is associated with precipitation aloft?
What is the impact of water droplets falling into a deep, dry planetary boundary layer (PBL)?
What is the impact of water droplets falling into a deep, dry planetary boundary layer (PBL)?
In which layer and at what temperature do ice crystals form from water vapor according to the text?
In which layer and at what temperature do ice crystals form from water vapor according to the text?
What is the significance of high relative humidity (above 90%) at temperatures below -5°C in the 700-400 mb layer according to the text?
What is the significance of high relative humidity (above 90%) at temperatures below -5°C in the 700-400 mb layer according to the text?
What does analyzing mid-level moisture aim to assess in atmospheric conditions?
What does analyzing mid-level moisture aim to assess in atmospheric conditions?
What typically delineates the top of the planetary boundary layer where haze layers are found?
What typically delineates the top of the planetary boundary layer where haze layers are found?
Under what conditions can haze persist for days according to the text?
Under what conditions can haze persist for days according to the text?
What atmospheric conditions can favor the formation of sulfate aerosols, leading to the creation of haze?
What atmospheric conditions can favor the formation of sulfate aerosols, leading to the creation of haze?
What factor can lead to the dissipation of haze according to the text?
What factor can lead to the dissipation of haze according to the text?
What range of visibility is typically restricted by haze according to the text?
What range of visibility is typically restricted by haze according to the text?
In what regions can elevated haze layers occur according to the text?
In what regions can elevated haze layers occur according to the text?
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