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# ATS 320: The Changing Climate Homework Assignment 1 The global energy accountant! Due Thursday, 21 January 2016 via Canvas as a &quot;Quiz&quot; 20...

This is my ATS 320 homework. Please help. I need the specific answers, and also the numerical answers, too.

1 ATS 320: The Changing Climate Homework Assignment 1 The global energy accountant! Due Thursday, 21 January 2016 via Canvas as a “Quiz” 20 total points, which is worth 5% of the total grade. Several answers are numerical and others require short written responses. For numerical answers you will want to calculate the answers on paper, then transcribe your answers to Canvas. For the written answers, short paragraphs should be constructed logically and you should attempt to follow a “5-sentence” structure to help formulate your arguments in succinct narrative. Figure 1: Global energy flows 1. In class, we said that the solar “constant” (S) is about 1361Wm -2 at the mean distance between the sun and Earth. Why is this number different than the one we see for incoming solar radiation at the top of the atmosphere in the Figure? 2. Given that the solar constant is an energy flux of 1361 Wm -2 and the mean distance between the sun and Earth is 1.5 x 10 11 m, what is the total energy output by the sun? Give your answer in units of Watts (W). ( Hint: remember the definition of flux )
2 3. What fraction of the sun’s total energy output does the Earth intercept, given that the radius of the Earth is 6.4 x 10 6 m? ( Hint: it’s really small ) 4. In class we found the radiative equilibrium temperature of earth was 255K. Imagine there was another planet that is exactly the same as the earth, but is twice the distance from the sun (i.e., 3.0 x 10 11 m). Determine the solar constant for this planet, and then calculate the radiative equilibrium temperature for this planet? 5a. From Figure 1, list the important fluxes entering and leaving at the top of the atmosphere, and calculate the energy balance at the top of the atmosphere in units of W/m 2 (difference of all incoming minus all outgoing 5b. Does this suggest the temperature of the entire earth (a measure of energy) is should increase, decrease or stay about the same. 6a. Again from figure 1 list all the important fluxes at the earth’s surface, and compute the energy balance in units of W/m2. 6b. What does this suggest about the global surface temperature ? Increase, decrease or stay about the same. 7a. Yet again from Figure 1, list the important fluxes absorbed an emitted within the atmosphere, and calculate the energy balance of the atmosphere in units of W/m 2 (difference of all incoming minus all outgoing. 7b. What does this suggest about the global average atmospheric temperature ? Increase, decrease or stay about the same. 8. Global-scale geoengineering offers a technological approach to counteract global increasing temperature. One approach to geoengineering the Earth is to artificially “brighten” clouds by injecting certain types of particles to change the behavior and albedo of clouds. Notice in Figure 1 that the surface energy imbalance is indicated as a separate arrow. By how much would the global albedo need to be adjusted by geoengineering to offset this difference? Give your answer as two numbers: a) the current planetary albedo derived from the figure, and b) the planetary albedo that you calculate to balance the existing imbalance.
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1. This number is different because the some of the solar power is reflected back to sun
from the top of the atmosphere
( 2. ( 3. ) ) 4.
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[( )] 5. a)
b) The temperature will increase as net...

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