Homework_08
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School
University of Wisconsin, Milwaukee *
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Course
100
Subject
Geography
Date
Dec 6, 2023
Type
Pages
5
Uploaded by MajorDoveMaster659
ATM OCN 100 Homework 8 Name: Camden Cull Due MONDAY, November 12, 2023 Student Number: 1.
Label the following features on the first set of attached surface (sea level pressure) and 500mb height maps (on the last sheet of the homework). Sea Level Pressure Map: a.
Label the surface lows with an L, and surface highs with an H. b.
Draw the cold and warm fronts for the mid-latitude cyclone over the Midwest. c.
Draw arrows denoting wind speed and direction at points (1), (2), (3), and (4) on the sea level pressure map. Be that the length of the arrows is representative of the wind speed. d.
For points (1), (3), and (5), draw arrows that denote the pressure gradient force, the Coriolis force, and friction. Be sure that the length of the arrows represents the strength of the force. e.
Where do you expect the fastest winds to occur at the surface, at point (1), (2), (3), (4), or (5)? Why? At point 2, we have lesser length of separation between the two consecutive isobars as compared to the isobars near any other points. This means a higher-pressure gradient force which leads to higher wind. 500mb Height Map: f.
On the 500mb height map, label trough axes with a solid line, and ridge axes with a dashed line. g.
Draw arrows denoting wind speed and direction at points (A), (B), (C), (D), and (E) on the 500mb height map. Be sure that the length of the arrows is representative of the wind speed. h.
For points (B), (C), and (D) draw arrows denoting the pressure gradient force and Coriolis force. Be sure that the length of the arrows represents the strength of the force. i.
Where do you expect the fastest winds at 500mb, at point (A), (B), (C), (D) or (E)? Why? C, Because the contour lines are closest together indicating it’s a
strong wind. Weather: j.
What sort of weather (e.g. windy? rainy? cloudy? Relatively warm or cold?) do you think Madison, WI experienced on November 11, 2022? Justify your answer. The weather was cloudy on November 11, 2016 in Madison, Wisconsin.
1. (Continued) k.
What would be a good weather forecast for Missouri (point 4) for the next 24 hours? Justify your answer. The Missouri weather forecast for the next 24 hours calls for clear skies with temperatures around 80 degrees Fahrenheit. 2.
The following map shows the climatological average 500mb height map averaged over the months of December, January, and February. a.
Draw a force balance diagram for winds at points A and B in the North and South Pacific Ocean, above. b.
What direction does the wind blow at point A and at point B? c.
Circle the two regions in the Northern Hemisphere where you expect the fastest winds at 500mb. Why did you choose those areas? Because where the contour lines are the closest than that means the wind speed is greater there.
3.
Suppose the surface pressure measured in Madison (at an elevation of 260 meters) is 984mb. a.
What would the reported sea level pressure
at Madison be on a summer day when we can assume an air density of 1 kg/m
2
? Note that the acceleration due to gravity is about 10 m/s
2
. Sea level pressure = 99400 Pa + ( 1 x 10 x 260) Pa = 102000 Pa or 1020 milibars b.
Should the reported sea level pressure
be higher, lower, or the on a cold winter day (think about how density would be affected)? Briefly explain why. On a colder day, reported sea level pressure will be higher than summer day because the density of air increases with decrease in temperature. Since density increases, value of p a g h will increase therefore sea level pressure during cold day will be more as compared to summer day. 4.
Altimeters are instruments that estimate your altitude based on a barometer that measures the pressure of the air around you. (With a topography map, these are useful for determining your location when you are when backpacking in mountainous terrain). Suppose you are on a multi-day backpacking trip. One of the days, you find yourself hiking in cloudy, rainy, and windy weather. That night, you note that your altimeter reads 1,750m above sea level as you go to sleep. When you wake up the next morning, it is cold with patchy clouds moving from the northwest to southeast, and the altimeter reads 1,650m above sea level. a.
What has happened to the pressure around you? This change could be influenced by factors such as changes in weather patterns, temperature, or local topography. The cold weather and patchy clouds moving from the northwest to southeast may also be indicative of atmospheric conditions that could affect pressure
. b.
H
aving taken “Weather and Climate”, your hiking partners turn to you for the daily weather forecast. They are concerned about spending another day hiking in rainy, wet conditions. What conditions might you forecast for the day? The presence of patchy clouds suggests that the sky is not entirely overcast. The cold morning indicates lower temperatures, which may persist throughout the day. The shift from rainy weather to patchy clouds could indicate a decrease in rainfall. While there might still be some lingering moisture, the overall precipitation is likely to be lower compared to the previous day.
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