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No Strings Attached
- Author:
-
Greg Shirah,
Paul Newman
- Subject:
- Science and Technology
- Institution Name:
- NASA
- Collection:
-
NASA GSFC Scientific Visualization Studio
- Grade Level:
- Secondary, Post-secondary
- Abstract:
A relatively warm Antarctic winter in 2004 kept the thinning of the protective ozone layer over Antarctica, known as the ozone hole, slightly smaller than in 2003. Each year the hole expands over Antarctica, sometimes reaching populated areas of South America and exposing them to ultraviolet rays normally absorbed by ozone. Scientists have new tools to study this annual phenomenon, and the human-produced compounds that contribute to ozone breakdown are decreasing. On September 22, 2004, ozone thinning over Antarctica reached its maximum extent for the year at 24.2 million square kilometers (9.4 million square miles). The largest maximum area on record was 29.2 million square kilometers, in 2000. On October 5, 2004, the ozone layer reached a low value of 99 Dobson Units.
- Course Type:
- Learning Module
- Languages:
- English
- Material Type:
- Other
- Media Format:
- Graphics/Photos, Text/HTML, Video
- Technical Requirements:
- Real player|Need MPEG-2 viewer, such as Visual Circuits HDfocus or Electrosonic HD Video Server
- Conditions of Use:
-
Public Domain
Please give credit to NASA GSFC Scientific Visualization Studio
No restrictions on your remixing, redistributing, or making derivative works.
Give credit to the author, as required.
Your remixing, redistributing, or making derivatives works comes with some
restrictions, including how it is shared.
Your redistributing comes with some restrictions. Do not remix or make
derivative works.
Copyrighted materials, available under Fair Use and the TEACH Act for US-based
educators, or other custom arrangements. Go to the resource provider to see
their individual restrictions.
The 2004 Antarctic Ozone Hole
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