T-Mobile 14:40 45%. HW 2.docx hesurfae ratdairgatK Question 5: Consider the surf

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T-Mobile 14:40 45%. HW 2.docx hesurfae ratdairgatK Question 5: Consider the surface temperatures you calculated for Q3 and Q4g. How might the surface of the oceans have been different during the Faint Young Sun with and without an atmosphere? Would this have affected life on Earth? Explain your reasoning in a couple sentences Hint: try converting the temperatures to Celsius and see what you notice. Part 2: Forcings and Feedbacks For the next questions, consider Figure 6.3, which shows the radiative forcing from anthropogenic (human-caused) forcings. You can also consult the very similar figure shown in lecture. Question 6: List the anthropogenic greenhouse gases (GHGs). Question 7: What is the total radiative forcing due to anthropogenic greenhouse gases? Question 8: Prior to the addition of anthropogenic greenhouse gases, the Earth had an Energy. of 238 W/m What new Energy..would be necessary for the Earth to be in energy balance again, after the addition of the GHGs? Question 9: The emission temperature of the Earth is 254.5 K. a) What new temperature does the Earth need to radiate at in order to produce the Energy from Q8? b) How much of a warming is this? Hint: you'll need to be precise (one decimal place will do it) to see the difference. c) Is the warming of the Earth you just calculated in Q9b a forcing or a feedback? Open With Print

Explanation / Answer

6. earth atmosphere is classified into several layers . and only 5 % heat reaches to the earth from the sun approximately. because most of heat filtered by the different layers of gases. ionosphere is the layer which prohibited ultraviolet rays of the sun. so we can say that without atmosphere, rays of the sun will reach to the earth in higher amount which increase the temperature of the ocean surface and earth surface . with increased temperature , coral like species will be destroy. and the ecosystem of the ocean will also disturbed. as well as when temperature will be increase then evoporation process will be more intense and water will convert into gaseous form. then salt concentration will increase in the ocean and water will be more dense . it will become also an obstacle in the ecosystem process.

earth surface will also face same destruction, ultraviolet rays will affect very badly to all species , different type of skin problems and disease will be spread.

7. anthropogenic greenhouse gases are-

(a) carbon di oxide - by coal burning , cement manufacture , traffic pollution , industry etc.

(b) nitrous oxide - by farming and forestry, use of pesticide etc

(c) methane - by livestock etc.

(d) aerosol ( suspended particles)

(e) chloro floro carbon - by air conditioner and refrigerator..

  

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