Quiz for Atmospheric Dust
Question 1 of 18
4 points
Around the world, most dust storms are generated in areas with:
Choose the best answer.
Sandy soil
Silt and clay
Question 2 of 18
4 points
Which techniques are useful for detecting dust in single channel images?
Choose all that apply.
Animating the imagery
Seeing if the area changes throughout the day
Contrast stretching the imagery
Relying on infrared imagery over the ocean and visible over land
Question 3 of 18
4 points
Dust RGB products are typically made from:
Choose all that apply.
Combinations of single channel images
Channel differences
Dust model forecasts
Combinations of forecast model output and single channel images
1

Question 4 of 18
4 points
Dust has the same colour and appearance in all dust RGB products.
Choose the best answer.
True
False
Question 5 of 18
4 points
TEXT ON GRAPHIC: MSG Dust RGB 17 UTC 07 May 2012
In this MSG dust RGB image, what is the feature in the circled area over the North Atlantic
Ocean?
Choose the best answer.
Dust
Volcanic ash
High-level cirrus
Question 6 of 18
3 points
Aerosol data provided by the CALIPSO satellite are typically used for:
Choose all that apply.
Determining the vertical height of a dust storm
Determining the phase of a dust storm's life cycle
Forecasting the onset of dust storms
Question 7 of 18
4 points
2

Short-range dust forecasts tend to rely more on real-time analyses while middle- and long-range forecasts rely more on model output.
Choose the best answer.
True
False
Question 8 of 18
4 points
Which phenomena typically cause dust storms?
Choose all that apply.
Frontal winds
Non-frontal trade winds
Thunderstorm outflow
Sea breezes
Question 9 of 18
4 points
What caused the dust storm shown in this dust RGB over the Middle East?
Choose the best answer.
Frontal passage
Convective downburst
Trade winds
Gap flow
Question 10 of 18
4 points
What caused the dust storm highlighted in the dust RGB over the Middle East?
3

Choose all that apply.
Convective downburst
Trade winds
Shamal
Gap winds
Question 11 of 18
5 points
Dust storms can impact:
Choose all that apply.
Local and regional air traffic
The health of people far downstream
Surface visibility
Agriculture but only in the immediate region
Local precipitation
Question 12 of 18
4 points
Which factors make an area prone to dust storms?
Choose all that apply.
The type of soil
Its topography
Its climate
Heavy cloud cover
Question 13 of 18
4

4 points
Use the selection box to choose the answer that best completes the statement.
Dust detection over land is easier with imagery while dust detection over ocean is easier with .
Question 14 of 18
4 points
What advantages do dust RGBs have over single channel imagery for dust detection and monitoring?
Choose all that apply.
Improved monitoring of the evolution of dust storms during the day and at night
Better detection of dust plumes over land
Can quantify the amount of dust generated from a source region
Are used to identify wet vs. dry ground
Question 15 of 18
5 points
TEXT ON GRAPHIC:
Dust RGB (IR 12.0 - 10.8 um: IR 10.8 - 8.7 um, IR 10.8 jm) 3 Mar 2004
Which labelled area in this dust RGB is dust?
Choose all that apply.
Question 16 of 18
6 points
If you are forecasting for an area prone to dust storms, you should closely monitor the following:
Choose all that apply.
Location of local dust source regions
Soil types and conditions
5

Local terrain and its impact on wind speed
Low-level instability
Height of the freezing level
Precipitation type
Question 17 of 18
3 points
Prefrontal dust storms typically occur:
Choose all that apply.
Ahead of strong low-pressure areas
In advance of a warm front
On the poleward side of a strong jet stream
Question 18 of 18
4 points
Which types of dust storms are more likely to move dust over long distances?
Choose all that apply.
Those related to frontal systems
Those related to trade winds
Inversion downburst storms
Dry downbursts from isolated thunderstorms
6