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Outline How does ozone depletion affect Australia? Why does Australia have the highest rate of skin cancer globally? Skin cancer risk factors Ozone module prepared by Eugene C. Cordero
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Ozone module prepared by Eugene C. CorderoOzone module prepared by Eugene C. Cordero
Lesson 3
"Ozone Depletion, Skin Cancer and Australia"
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Ozone module prepared by Eugene C. CorderoOzone module prepared by Eugene C. Cordero
OutlineOutline
How does ozone depletion affect Australia?How does ozone depletion affect Australia?
Why does Australia have the highest rate of skin Why does Australia have the highest rate of skin cancer globally?cancer globally?
Skin cancer risk factorsSkin cancer risk factors
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Ozone module prepared by Eugene C. CorderoOzone module prepared by Eugene C. Cordero
What are the consequences of an ozone depleted world?
With ozone depletion, there will be higher rates of UV radiation.
More UV radiation rates mean– Higher rates of skin cancer– Higher amounts of cataracts– Possible danger to plant and animal life
Recall: Without the ozone layer, life on the Earth’s surface would not exist!!!
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Ozone module prepared by Eugene C. CorderoOzone module prepared by Eugene C. Cordero
How does ozone depletion affect Australia?
Global ozone trends?
Ozone Hole?
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Ozone module prepared by Eugene C. CorderoOzone module prepared by Eugene C. Cordero
Global Ozone Trends Global Ozone Trends
Most of Australia does not have large negative ozone trends
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Ozone module prepared by Eugene C. CorderoOzone module prepared by Eugene C. Cordero
How does ozone depletion affect Australia?
Is the ozone hole over Australia?
No, not even close!
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Ozone module prepared by Eugene C. CorderoOzone module prepared by Eugene C. Cordero
… then why does Australia have the highest rate of skin cancer?
Naturally high levels of UV radiation in Australia
Australia has a light skin-type population
Lifestyle choices (suntan, outdoor hobbies etc.)
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Ozone module prepared by Eugene C. CorderoOzone module prepared by Eugene C. Cordero
Skin Cancer Risk Factors
High RiskLow Risk
Skin type: Light skin Dark skin
Environment: Tropics High Latitudes
Occupation: Outdoor Indoor
Social factors (i.e. hobbies etc.)
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Ozone module prepared by Eugene C. CorderoOzone module prepared by Eugene C. Cordero
Australia is in a high sunlight environment!!!
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Ozone module prepared by Eugene C. CorderoOzone module prepared by Eugene C. Cordero
Skin Cancer and Ozone Depletion
Most skin cancer is attributed to exposure 20 or more years ago (before ozone depletion).
The younger generation of today will face higher risks in the future due to current decreases in ozone levels and increases in UV (~5-10%).
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Ozone module prepared by Eugene C. CorderoOzone module prepared by Eugene C. Cordero
Ozone depletion and global warming
No direct connection between these environmental issues. However: Global warming may enhance ozone
depletion– global warming produces
Tropospheric warming & stratospheric cooling
– Therefore, if the stratosphere cools, then ozone destroying chemistry (e.g. ozone hole), will increase.
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Ozone module prepared by Eugene C. CorderoOzone module prepared by Eugene C. Cordero
Summary
Many factors influence skin cancer such as A sun smart lifestyle!
