GEOG01_Assignment01
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University of California, Los Angeles *
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1
Subject
Geography
Date
Apr 3, 2024
Type
Pages
7
Uploaded by qinkaley
Assignment #1 GEOG 1 Intro to Physical Geography Due Date: Sunday Jan. 28 11:59 pm Pacific *Each of the 4 assignments this quarter will have a unique point structure, but each assignment will contribute an equal 11.25% to the final grade. The Earth’s Seasons and Energy Balance (52 points*) Please answer all questions concisely. You are welcome, and encouraged, to discuss the questions with your classmates but you must create your written responses yourself. None of the numbered items below (including sequences of questions within a single item) should require a response longer than 150 words, and most responses can be far shorter than that. Directions for preparation and submission of your response document are at the end of this PDF. ---------------------------------------------------------------------------------------------------- 1) The diagram below depicts the earth orbiting the sun. The letter “N” is shown above the earth’s axis and represents the North Pole. Is this more likely a depiction of the earth on the Northern Hemisphere’s summer solstice or winter solstice (
1 point
), and how can you tell (
3 points
)? 4 points total
2) What is the angle of tilt of the earth’s axis (in degrees relative to being perpendicular to the plane of the ecliptic) (
1 point
)? If earth’s tilt were to increase, would this intensify or weaken the earth’s seasonal cycle (
1 points
), and why (
3 points
)? 5 points total
3) Do the tropics tend to experience smaller or larger seasonal cycles in daylength and temperature relative to higher latitudes (
1 point
)? Why (
3 points
)? 4 points total
Assignment #1 GEOG 1 Intro to Physical Geography Due Date: Sunday Jan. 28 11:59 pm Pacific *Each of the 4 assignments this quarter will have a unique point structure, but each assignment will contribute an equal 11.25% to the final grade. 4) The graph below shows the results of an experiment in which your professor pointed a heat lamp for five minutes toward two surfaces that are identical except that one is black and the other white. The graph shows the temperature of each surface during the experiment. Which line (squares or circles) in the graph most likely represents the black surface (
1 point
) and why (
2 points
)? If the heat lamp’s intensity remained constant throughout the experiment, why did the temperatures of the two surfaces stabilize rather than continue to warm (please use “radiative equilibrium” in your answer) (
3 points
)? 6 points total
5) Virtually all of the energy that drives earth’s climate and living systems comes in the form of shortwave energy from the sun. On average, how much solar radiation is absorbed
by the earth and atmosphere (in watts per square meter) (
1 point
)? If the earth absorbs this much energy year after year, how does the earth avoid heating up indefinitely (
3 points
)? 4 points total
Assignment #1 GEOG 1 Intro to Physical Geography Due Date: Sunday Jan. 28 11:59 pm Pacific *Each of the 4 assignments this quarter will have a unique point structure, but each assignment will contribute an equal 11.25% to the final grade. 6) The map below shows the earth’s albedo, which includes albedo from the earth’s surface and atmosphere. Please explain what this variable represents (
1 points
). Which regions have the highest albedo values and why (
2 points
)? 3 points total
7) The map below shows downward longwave
radiation at earth’s surface (global average: 339 W/m
2
). If the sun is the original source of virtually all energy in earth’s climate system, and if solar radiation is shortwave
, then why does earth’s surface receive so much downward longwave
radiation? 3 points total
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