Assignment #3 ATMO 220
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School
University of Kansas *
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Course
220
Subject
Geography
Date
Apr 3, 2024
Type
Pages
2
Uploaded by SargentFangRedPanda43
Chapter 10
What front is typically found east of the extratropical cyclone center? Describe the weather
conditions in this region(4 points)
A warm front is found east of this. Either dry conditions or high, wispy clouds are expected.
North of the surface warm front, precipitation could occur as freezing rain, rain, ice pellets, or
snow, based on the vertical temp structure. (pg 195)
What happens to the position and intensity of cold and warm fronts as a cyclone matures?(4)
The cold front will be moving from South and East. moving north would be warm fronts and as
the cyclone gets older, frontal contrasts get stronger. (pg 204-205)
Chapter 11
What types of hazardous weather might residents from the east coast experience during an east
coast cyclone?(4)
Types of hazardous weather can include heavy snowfall, high winds, coastal flooding, and cold
temperatures. (pg 214)
Describe at least 2 ways that air is forced to rise in east Coast cyclones.(6) (no page number)
Converging air at the surface of cyclones climbs. Warm air is less dense when compared to cold
air. Immediately ahead of the cold front, the warm air is forced to quickly climb as the dense,
cold air flows into the warm air zone.
Chapter 12
Describe qualitatively how the temperature profile conducive to ice pellets differs from that
conducive to freezing rain.(6)
Ice pellets spend less time above 32 degrees Fahrenheit and more time below zero degrees
before they touch the ground. Unlike ice pellets, freezing rain dips below freezing lower to the
ground and spends a great deal of its time above freezing. (pg 239)
Where is freezing rain and drizzle most common in North America?(4)
In Eastern Canada and by the Great Lakes. (pg 243-244)
Chapter 13
How does wind speed change when air flows over a lake? Explain how this affects convergence
and divergence, and how it influences the development of lake-effect snow. (8) (no page
number)
When air tends to flow over a lake, it rapidly accelerates due to reduced surface friction. Along
the upwind shoreline, divergence happens close to the surface. The air becomes moistened
when it is near water. The strongest winds behind the wind that brought landfall converge on it
as air strikes the downwind shoreline, pulling the moist air up, enhancing convection, and
producing the greatest snowfall close downwind of the convergence zone.
What time of year is lake-effect snow most likely? Why?(6)
There is a sufficient temperature change from the middle of November to early January.
Because that is when the temperature is most likely the coldest. (pg 255-256)
Chapter 14
What causes cold polar air masses to typically move southeastward over North America? (4)
The tendency for a denser fluid to sink relative to a less dense fluid and to spread laterally at
low levels. And the second cause is the movement of the low level air mass in response to
stronger steering flow in the middle and upper troposphere. (pg275)
Where do the Northern Hemisphere’s coldest air masses develop during winter? (4)
In northern Canada and Alaska. As the cold air mass moves south, it carries dry weather to the
U.S.(pg 276)
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