Examination and evaluation of real-time oceanographic data on the internet
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and OCEAN BASINS |
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ATMOSPHERE DYNAMICS |
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Introduction to Questions on Antarctic Ozone:
- The questions are outlined in two tables ( previous page , this page)
- they explore the ozone hole over Antarctica, focussing on:
- temporal changes in its size and shape.
- vertical profiles of ozone concentrations
- Reminder: you should submit your answers via oncourse .
| Atmospheric Ozone (contd.) |
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| Temporal Changes in Ozone Concentrations | |||||||||||||||||||||
| The NOAA Climate Modeling and Diagnostics Laboratory provides a webpage that provides links to data and information offered by the South Pole Ozone Program that enable ozone profiles for specific dates to be viewed: http://www.cmdl.noaa.gov/ozwv/ozsondes/spo/index.html | |||||||||||||||||||||
| 6. | Follow the links to the 2001 South Pole Ozone Profile, selecting
the button corresponding to each of the designated dates and then the
button below the table of dates entitled "Request Ozone Profile"
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| (i) | What is the minimum ozone pressure for each of the days? |
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| (ii) | Is there a correspondence between temperature and ozone pressure? HINT |
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| 7. | Describe the seasonal changes that occur in ozone profiles (Bonus) HINT |
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| Inter-Annual Variations in Ozone Profiles and Concentrations | |||||||||||||||||||||
| Examine the vertical profiles of ozone
minima at the South Pole since 1986. http://www.cmdl.noaa.gov/ozwv/ozsondes/spo/spmin.html |
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| 8. | Describe the progressive changes that have occurred in the vertical profile of ozone pressure versus altitude since 1986. |
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| Examine the series of annual maps of total ozone monthly averages over Antarctica in October since 1979. http://jwocky.gsfc.nasa.gov/multi/monoct.gif | |||||||||||||||||||||
| 9. | Comment on the general trends in ozone levels over Antarctica since 1979, referring to progressive changes in its areal extent and minimum value. HINT |
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| Examine the diagram of the size of the
2001 southern hemisphere ozone hole in comparison to other years. http://www.cpc.ncep.noaa.gov/products/stratosphere/sbuv2to/ozone_hole_plot.gif |
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| 10. | Describe the differences in the timing and magniture of the area of the antarctic ozone hole in the past two years compared with decadal average values. HINT |
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| Examine the diagram depicting temporal
changes in the total concentration of ozone (in Dobson units) for selected
years. http://www.cmdl.noaa.gov/ozwv/ozsondes/spo/spototal.html |
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| 11. | Describe the progressive changes in the timing and values of ozone concentrations over antarctica during recent years. HINT |
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| Examine the diagram depicting temporal
changes in the total concentration of ozone (in Dobson units) at an altitude
of 12-20km for selected years. http://www.cmdl.noaa.gov/ozwv/ozsondes/spo/1220plot.html |
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| 12. | Describe the progressive changes in the timing and magniture of the ozone concentrations over antarctica at 12-20km during the past decade. Are they representative of the development of the ozone hole? (Bonus) HINT |
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| Examine the series of diagram depicting
temporal trends in the atmospheric concentation of specific halocarbons. http://www.cmdl.noaa.gov/hats/graphs/graphs.html |
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| 13. | Describe and explain the historical trends in CFC-11 in the atmosphere. |
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| 14. | Describe and explain the trend in the atmospheric concentrations of the four substitute halocarbons (HCFC-22, HFC-134a, HCFC-141b and HCFC-142b). |
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| 15. | Explain the relationship between the trends of CFC-11 and the substitute halocarbons considered in Q14. and Q.15. (Bonus) HINT |
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Department of Geological Sciences,
1001 E. Tenth Street, Bloomington, IN 47405-1403
Phone: (812) 855-5582 Last updated: 5 Novermber 2002
Comments: simon@indiana.edu
Copyright 2000, The Trustees of Indiana University