Atmospheric Physics and Climate Change — DU B.Sc. (Hons) Physics Previous Year Question Papers

: B.Sc. Hons.-(Physics :Atmospheric Physics and Climate Change a)SE) Max Marks: 90 a) Explain features of SAO in the stratospheric region. b) Why does the temperature increase in the stratospheric region? c) Explain how climate change affects the global hydrological cycle. d) What are the basic equations that govern large motion ofEarth's atmosphere? e) What is the restoring force for atmospheric gravity waves? In which atmospheric layers are gravity waves commonly observed? I) Briefly explain the formation of sea breeze and land breeze. g) What is atmospheric radar? State the frequency range of VHF atmospheric radar. What is meant by radar backscattering in the atmosphere? a) b) 9) Quasi-biennial oscillations plays a vital role in controlling large basic wind, show with a clear sketch in at least one parameter i.e. in wind or in temperature (6) Describe the routine radiosonde observational programme carried out by the India Me-teorological Department (IMD). What atmospheric variables are recorded during these observations? -6 Discuss the processes responsible for the development of convection in the tropical at-mosphere during the summer season. Also explain how radar observations help in studying fine-scale atmospheric gravity wave systems. -6 a) b) c) Derive the general form of the radar range equation of a high-power radar (in VHF band) and explain the physical meaning of each term. What is the difference between mono-static and bistatic radar? 6 Calculate range resolution for a 8 micro second pulse? What is the corresponding wave-length for a 47 MHz frequency radar? 6 What is Doppler shift in radar systems, and how is it used to measure target velocity? a) b) c) Show a graphical representation of diurnal (24 hour) variation of pressure, relative humidity, temperature, and wind during winter with explanation. 6 Give an account on different atmospheric wave system. 6 Strong convection growth in the tropics is a common phenomenon, explain it- 6 List the different sources of gaseous components for temperature rise? -6 Give a description ontheNetzero Emissions to be achievedby India? -6 What do you understand by aerosols, what is their role in the lower atmosphere? -6 Question 6. i) ii) iii) iv) Write a short note on any of the three Toxic air quality during winter in Delhi-NCR Pollutants variability from summer to winter Advantage of Radar observations in the atmosphere Global rise in temperature and climate change