Homework#3 IDS310
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California State University, Dominguez Hills *
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310
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Information Systems
Date
Dec 6, 2023
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IDS310 Global Climate Change
Homework #3 (10 points)
Global Climate Change
Instructions:
Answer the following questions from the lectures, reading and your own research.
Write in complete sentences and/or explain in short paragraph. Upload to Blackboard.
1) Consider the relationship between the Sun and the Earth. Why do we have seasons? Draw a
diagram for each of the 4 seasons. Be sure to label the Sun and the Earth and show their relative
positions. Remember, scientific diagrams have a title, labels to everything, arrows to show
movement etc. Write a few sentences explaining your diagram.
The Earth is tilted at an angle of about 23.5 degrees which means that it may be pointed towards
the Sun or away from the Sun depending on its position. This variability in sunlight throughout
the year is one of the reasons for seasons. The Earth takes 365 days to revolve around the Sun
which means that different areas of the Earth receive different amounts of light at different times.
2) What is defined as The Wobble Effect, which causes seasons to be opposite every 13,000
years?
A. Precession
B. Obliquity
C. Eccentricity
D. Orbital Plane
3) What is defined as the Earth’s orbit going from elliptical to circular and back again every
100,000 years?
A. Precession
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IDS310 Global Climate Change
Homework #3 (10 points)
B. Obliquity
C. Eccentricity
D. Orbital Plane
4) What is defined as the Axial Tilt changing between 22.1° and 24.5° and back again every
41,000 years?
A. Precession
B. Obliquity
C. Eccentricity
D. Orbital Plane
5) How would seasons be different when eccentricity is at a maximum versus minimum?
As the Earth eccentricity increases, the seasons become longer and colder when farther from the
sun. When closer to the sun, the seasons become shorter and warmer. When eccentricity is at a
maximum, seasonality range becomes more severe.
6) Name at least three different ways that sea level rise affects coastlines.
1) Coastal flooding
2) Rise in storm and tidal surge
3) Groundwater contamination
7) Describe at least three reasons why the east coast of the United States is more vulnerable to
sea level rise as compared to the west coast. Be sure to include differences in geography, ocean
and atmospheric circulation, and anticipated effects of climate change.
The east coast is relatively low in elevation. The east coast is then more susceptible to coastal
flooding and is hit harder by storms and tidal surges.
8) Describe at least three reasons why the west coast of the United States is more vulnerable to
drought as compared to the east coast. Be sure to include differences in geography, ocean and
atmospheric circulation, and anticipated effects of climate change.
The western U.S. mountain ranges keep the west coast relatively dryer than the east coast. The
hot air from the equator rises and flows to the right due to the Coriolis Effect. The west is in a
rain shadow which means that the winds are dryer due to the mountainous ranges it passes
through.
9) How is Sea Level Rise a Climate Justice issue?
It is a Climate Justice issue because the rise in sea level can affect communities. Sea levels rising
can cause communities to leave their homes due to flood or any other damage. This means that
populations may need to crowd into other communities causing overpopulation of certain areas.
10) Give an example of a wealthy country that is affected by sea level rise and a poor country
that is affected by sea level rise. How are they similar and how are they different?
The United States is an example of a wealthy country and Cambodia is an example of a poor
country affected by sea level rise. The U.S. has more money to supply to disasters caused by sea
level rise while poorer countries like Cambodia are affected much harder by sea level rise. They
both experience the effects of climate change and the toll it takes on their populations.
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IDS310 Global Climate Change
Homework #3 (10 points)
11) Using the graph below, estimate how much sea level would result from the corresponding
global mean temperature.
Temperature,
o
C
Sea Level, m
9
-130 m
15
0 m
17
45 m
19
80 m
12) How much
in total
can global sea level change from a glacial maximum to melting all ice
and snow on the planet?
If all the ice and snow melted on the planet, the sea level would rise about 70 meters.
13) Slowed atmospheric and ocean circulation causes drought in the western United States and
slow moving, more intense hurricanes along the east coast.
True
False
14) Describe the difference between a positive feedback mechanism and a negative feedback
mechanism.
Positive feedback means that any output of a system is amplified which means increase leads to
increase and decrease leads to decrease. Negative feedback means that the output of a system is
stabilizing. In other words, increase leads to decrease and decrease leads to increase.
15) Give an example of a positive climate feedback mechanism and describe how it works.
Ocean warming is an example of positive climate feedback mechanism. As carbon dioxide
increases it increases the warming of the atmosphere and therefore the oceans. This is because
carbon dioxide is absorbed by the water surface.
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IDS310 Global Climate Change
Homework #3 (10 points)
16) Give an example of a negative climate feedback mechanism and describe how it works.
An example of a negative climate feedback mechanism would be the increasing temperature and
its increase in cloud cover. The increase in clouds would then reduce the amount of solar
radiation from outer space which would stall or decrease warming.
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