Meteorology Period 6 Assignments
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- 2015-2016 School Year
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Stratospheric Ozone Depletion Online Activity
- Start with the Center for Atmospheric Science at Cambridge University multimedia ozone hole tour at http://www.atm.ch.cam.ac.uk/tour/index.html.
- a) When was the stratospheric ozone loss over the South Pole 1st
- noticed?
- b) How is ozone formed?
- c) Above which latitudes is the ozone layer usually the thinnest?
- d) What are the Chapman Reactions?
- e) Where was the ozone loss 1st detected?
- f) Look at the graph of total measured ozone above the Halley Research Station.
- Describe the overall trend in ozone concentration from the year 1950 to 1995.
- Why does the ozone level fluctuate within each year?
- What is the lowest reading, and in which year was it recorded?
- Look at the monthly averages for October images and check that the images agree with your answers.
- Go to the TOMS home page at http://toms.gsfc.nasa.gov/index_v8.html.
What does TOMS stand for?
What federal agency is responsible for TOMS?
What is the status of the 2004 ozone “hole?”
Look at the linked image of the total ozone at the South Pole for Nov. 17, 2004. What was the ozone concentration directly above the South Pole on this date?
How can scientists measure the ozone layer from the ground? (http://toms.gsfc.nasa.gov/teacher/Misslink/WEB-misslink.html#s1)
What is a Dobson unit? (http://jwocky.gsfc.nasa.gov/dobson.html) How much ozone is above us? (http://jwocky.gsfc.nasa.gov/teacher/ozone_overhead.html)
- Find our latitude and longitude (http://pagesperso-orange.fr/universimmedia/geo/loc.htm)
Latitude ___________________ Longitude ___________________
What is today’s UV index? (http://www.epa.gov/sunwise/uvindex.html)
Go back to the TOMS homepage and look at Erythemal UV. · What is shown in the Erythemal UV images?
- What are the wavelengths of solar radiation that are harmful to humans?
Briefly summarize the 4 major health effects of UV exposure at http://www.epa.gov/sunwise/uvandhealth.html.
Look at the Earth Probe Data (on left side of TOMS homepage under Spacecraft), read about the Earth Probe satellite and instruments, and then go to the Earth Probe data page.
- Select South Pole Ozone PNG and check the ozone concentration for the following dates: Jan. 1, March 1, Oct. 1 for the years 2001 & 2004. Summarize your observations.
Click on ozone hole monitoring page http://toms.gsfc.nasa.gov/eptoms/dataqual/ozone_v8.html and look carefully at the 2 graphs.
- Daily Minima in Southern Hemisphere: What is on the x-axis and what is on the y-axis?
- What is your explanation of what this graph shows?
- Daily estimates of Ozone Hole Area: What is on the x-axis and what is on the y-axis? What is your explanation of what this graph depicts? SearchESRL(http://www.esrl.noaa.gov/csd/),EPA (http://www.epa.gov/docs/ozone/science/q_a.html), and (http://www.ccpo.odu.edu/SEES/ozone/oz_class.htm) to answer these questions about ozone.
Do changes in the ozone layer affect global climate and how?
Why can’t we take ground level ozone and put it in the stratosphere?
Why is ozone depletion worse over the South Pole?
Is ozone also depleted over the North Pole?
How do CFCs get to the stratosphere?
Aren’t they heavier than air?
How do we know that ozone depletion is being caused by humans and not natural causes?