Module02_Activity_Systems
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School
University of New Mexico, Main Campus *
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Course
1130
Subject
Geology
Date
Dec 6, 2023
Type
Pages
4
Uploaded by malmac123
GEOL 1110
Module 2 Activity:
Earth Systems
1. Following the model of the bathtub system in the systems video from Module 1, draw
and label a systems diagram
depicting a campus parking lot
with one entrance and one
exit. Assign units to the inflow, reservoir, and outflow on the sketch.
GEOL 1110
Module 2 Activity:
Earth Systems
2. At what time(s) of day do you think the parking lot is most likely to be at equilibrium?
Why?
It could be at equilibrium sometime soon after the lunch rush. So approximately
between 1pm and 3pm. At this time of day, I believe that many people would be
heading in and out to run errands, pick up kids from school, go to meetings after lunch,
etc.
3. Describe a time of day where the parking lot is not in equilibrium. During this time of
day that you describe, which is higher
—
in the inflow or the outflow?
A time where the parking lot is not in equilibrium would be somewhere between the
hours of 7am to 9:30am. This is because many people would be arriving to their jobs
needing a place to park. Since that is an earlier time frame, not much else is typically
going on so the inflow to the parking lot would be higher than the outflow.
GEOL 1110
Module 2 Activity:
Earth Systems
4. Below is a plot of Arctic sea ice extent for the month of August from 1979-2019 (National Snow and
Ice Data Center; http://nsidc.org/arcticseaicenews/2019/09/) derived from satellite data.
First, look at the graph axes:
a. What is measured on the y-axis?
Extent (millions of square kilometers)
b. What is measured on the x-axis?
Year
c. How would you describe the overall trend?
There is an overall trend of a decreasing amount in the ice
extent
d. What type of feedback loop do you think is at work in Arctic? Balancing or reinforcing? Why?
It would
be a reinforcing feedback loop because the is no stabilizing in the graph. The trend is going down,
decreasing, not staying in a regulated level.
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GEOL 1110
Module 2 Activity:
Earth Systems
5. In fact, the Arctic has what is known as the ice-albedo feedback.
Albedo
refers to the amount of
sunlight a surface can reflect. Sea ice is
white (high albedo) and reflects most of the Sun’s energy. Ocean
water is dark (low albedo) and absorbs much of the Sun’s energy, thereby retaining heat. Given this
information, complete the systems diagram below. Add arrows and +/- relationships to the diagram: