GPHY 209 QUIZ 3

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Queens University *

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209

Subject

Geography

Date

Jan 9, 2024

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docx

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Uploaded by MajorOstrich2697

1. What are three of the five ways to raise air in order to form clouds? (3 marks) Three ways to raise air for the purpose of cloud formation include orographic uplift which is when the air mass is forced from a low elevation to a higher elevation thus cooling down and raising humidity levels, convection which is the process of when warmer air is rising since it is less dense that the surrounding atmosphere and lastly frontal uplift which is when contrasting air masses converge along a weather front. 2. What is an inversion? Why are inversions more likely to occur along a warm front rather than a cold front? (2 Marks) Inversion is a deviation from the normal change of an atmospheric property with altitude as temperature increases. It occurs most often in warm fronts if the air mass sinks low enough then the air at higher altitudes become warmer than at lower altitudes and sits for a longer period of time thus producing a temperature inversion. 3. Clearly draw an approximate location for the jet stream over North America on this 500 hPa pressure map. (2 marks) 4. Draw a simple diagram with an ELR that generates stable atmospheric conditions for an unsaturated air parcel. (2 marks) 5. Draw a side view of a cold and a warm front, showing the vertical boundaries and general cloud patterns (4 marks): Cold Front Warm Front SALR ELR DALR Temperature Height Warm air Warm air

6. What cloud type would you associate with very strong convection, even thunderstorm activity? (1 mark) Cumulonimbus cloud types are typically associated with strong convection and thunderstorm activity with high precipitation. 7. When the sky is 7/10 ths cloud cover, how would we describe this? (1 mark) If the sky were at a 7/10ths cloud cover, this would be better described as broken meaning there are a few breaks within the cloud’s formation. 8. What are meant by stable, unstable and neutral atmospheric conditions in reference to an air parcel? (3 Marks) There are three different types of atmospheric conditions including stable, unstable and neutral. In terms of stable atmospheric conditions, it is when the air resists uplift and sinks to its initial position. As for an unstable atmospheric condition, it refers to when the air is buoyant and continues to rise. Lastly, neutral atmospheric conditions are when the air comes to a rest where it was displaced. Cold air Cold air

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