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introduction to modern climate change

Questions and Answers of Introduction To Modern Climate Change

Imagine a planet with a solar constant of 1,500 W/m2 and an albedo of 0.6. Which would cause that planet’s climate to warm more, a 1 percent increase in solar constant or a 0.01 decrease in
Imagine a planet with a solar constant of 3,500 W/m2 and an albedo of 0.8. The planet has no atmosphere.(a) What is the planet’s climate sensitivity in K per W/m2?(b) If the Sun gets 10 percent
Aerosols have a short lifetime, so once we stop emitting them, their atmospheric abundance will go to zero in a few months. This is a very important goal – aerosols are one of the primary
(a) List all of the physical processes that can alter the climate.(b) For all processes in part (a) except greenhouse gases, explain why they are unlikely to be the cause of the warming over the
In this chapter, we reached three different conclusions about the attribution of recent warming to humans. The three different statements had different levels of uncertainty. What are the statements,
Why are feedbacks (e.g., increases in water vapor) not discussed as potential causes of climate change?
Explain the physical mechanism for the occurrence of ice ages. Make sure you explain the role of carbon dioxide and its timing with respect to the temperature change.
Critique this statement: “It is clear that it was warmer around 1000 AD, during the Medieval Warm Period, than it is today. Therefore, humans cannot be causing today’s warming.” Assume that the
What are the three ways that the Earth’s orbit varies? How does each variation affect the climate?
Explain how the Paleocene–Eocene Thermal Maximum provides support for the claim that today’s warming is caused by humans.
How does plate tectonics affect our climate?
(a) Someone asks you about how much the climate will warm over the next 100 years. How do you answer?(b) What determines whether we are at the bottom end of the range or the top end of the
(a) Define each term in the IPAT identity.(b) What are the units of each term? Show how the units cancel so that the I term has units of emissions of greenhouse gases.
What is the single most important thing the world needs to do to address climate change? Why?
A friend argues, “We must be certain climate change is a problem before we take action.” Another friend argues, “We must take action if the slightest chance exists that climate change could be
Imagine that your hometown is always at risk of being destroyed by some natural disaster (tornado, hurricane, earthquake). How much would you pay each year to eliminate the chance that the disaster
(a) Explain conceptually the role that discounting plays in determining climate change policy.(b) If you change the discount rate from 0 percent to 4 percent, how will this change your policy?
Juries in criminal trials are given a standard of evidence that must be crossed in order to find a defendant guilty. What is it? What would the standard be if our society decided that the worse error
For climate impacts happening in 50 years, how much effort do you think we should make to eliminate those? What about impacts happening in 500 years?
How does irreversibility of the choices affect policy decisions?
Economic analyses struggle to assign a monetary value to a small chance of a truly terrible outcome. To see this, imagine that some otherwise unavoidable activity carries with it a one-in-a-thousand
Ein is the energy being absorbed by an object, and Eout is the energy being radiated.(a) If the temperature of an object is not changing, what does this tell us about Ein and Eout?(b) If the
The temperature of an object increases by 1 K. How much did it increase in degrees Fahrenheit and how much in degrees Celsius?
A sphere with a radius of 1m has a temperature of 100°C. How much power is it radiating?
Consider two stars that have the spectra shown in Figure 3.7. Based just on the information provided in this plot, what are the colors and radiating temperatures of the stars?Figure 3.7 power emitted
As a room-temperature object increases in temperature, it begins to glow. Describe the progression in colors as the object heats up. Ultimately, what happens to the glow if the warming continues to
How much total energy (in watts) is the Sun radiating? It is a 6,000-K blackbody with a radius of 700,000km.
You can dim an incandescent bulb by decreasing the temperature of the filament. What do you think happens to the color of the bulb as it dims? Find a dimmer and test your hypothesis.
If you run a 60-W light bulb for one week, how many joules of energy have been consumed?
Why are incandescent light bulbs being phased out in many countries (including the United States)?
The Sun as a blackbody:(a) The Sun is a 6,000-K blackbody. At what characteristic wavelength does it radiate?(b) How much power per unit surface area is the Sun radiating?(c) Imagine that the Sun
Your bank account has the same balance on April 1 as it did on March 1. Your friend suggests that this means that you did not deposit or withdraw any money for the entire month. Is that correct?
Heat capacity is the amount of energy you need to add to an object to warm it up by 1K. The heat capacity of water is 4.18 J/g/K; in other words, if you add 4.18 J to 1 g of water, the water will
Microwave ovens are able to deliver more energy to food during cooking than conventional ovens, so microwave ovens can cook food faster. For the following, imagine you are cooking a turkey in a
Refrigerators are essentially reverse ovens – they cool things by maintaining the walls at low temperatures. Imagine you put a turkey with a temperature of 80°C into a refrigerator with walls of
Determine the latitude and longitude of the White House, the Kremlin, the Pyramids of Giza, and the point on the opposite side of the Earth to where you were born. Use an online tool (e.g., Google
(a) Convert the following temperatures from degrees Fahrenheit to degrees Celsius: 300, 212, 70, 50, 32, and 0°F.(b) Convert the following temperatures from degrees Celsius to degrees Fahrenheit:
(a) The temperature increases by 1°C. How much does it increase in degrees Fahrenheit?(b) The temperature increases by 1°F. How much does it increase in degrees Celsius?(c) This is true: I told
What temperature has a numerical value that is the same in degrees Celsius as it is in degrees Fahrenheit?
Find a two-digit temperature in degrees Fahrenheit for which, if you reverse the digits, you get that same temperature in degrees Celsius (e.g., find a temperature, such as 32°F, for which the
Why do you believe that smoking causes cancer? (If you do not believe this, then why do you believe that smoking does not cause cancer?) What would be required to get you to adopt the opposing view?
Practice reading a graph. These questions all refer to Figure 1.1.(a) What fraction of days have a daily high temperature of 28°C during the 1970s and the 2010s?(b) For the 1970s and 2010s, what
Find two friends who have strong but opposing views of climate change.(a) Ask both of them why they believe what they do and what would be required for them to adopt the opposing view. It is
Give examples of situations when weather affected your or your family’s life. Then do the same for climate.
Those opposed to the IPCC’s scientific conclusions have set up their own summary of the science of climate change, which they call the NIPCC. Do some online research and then compare and contrast
In the climate debate, few institutions are attacked as frequently as the IPCC. Using web searches, identify some arguments made by those arguing that the IPCC cannot be trusted.
You are the President of the United States. A novel virus has appeared, and two trusted advisors are giving you contradictory claims about how bad it is. One says it’s no worse than the flu, the
From Figure 2.2, how much did the Earth warm between(a) 1880 and 2020 and(b) 1970 and 2020? Provide answers in both degrees Celsius and degrees Fahrenheit.Figure 2.2 anomaly
Donald Trump says that the wildfires in California in 2020 were caused by forest management while Joe Biden says it’s due to climate change. Whose statement do you believe and why? Do you think
Every year, you measure the height of a child relative to a coat hook on the wall. In the first year, he was 2″ below the hook, the next year he was 1.5″ below the hook, the next year he was
If you found out that the satellite data were unreliable because of a previously unknown error, would that change your opinion about whether the Earth is currently warming? Why or why not?
A reporter asks you to explain why scientists are so confident that the Earth has undergone a general warming over the past century. Knowing that reporters hate long answers, construct an answer that
Download the annual and global average temperature data from Berkeley Earth (link to data located at www.andrewdessler.com/data) and reproduce Figure 2.2. Calculate the trend for the past 30 years
List the evidence that supports the contention that the Earth is currently warming. Is there any evidence that goes against this conclusion?
What is a temperature anomaly? Why are temperature anomalies typically used in global temperature calculations?
Download the monthly and global average temperature data from Berkeley Earth (located at www.andrewdessler.com/data). Calculate trends over various lengths of time (ranging from a few years to
Go to the station page on Berkeley Earth (link to data located at www.andrewdessler .com/data) and find a station near your hometown or city you live in today that covers a century or so (they’re
The stations that make up the surface thermometer data set must be individually adjusted to account for known issues in the data set (e.g., station moves). Some skeptics claim that the warming in the
Why do we turn to paleoproxy measurements to infer the temperature of millions of years ago?
A global warming advocate tells you that the Earth is now warmer than it has ever been.Is that correct?

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