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Ozone and Chlorine Monoxide over Antarctica from MLS (1/12/93 - 9/17/93)
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The Microwave Limb Sounder (MLS) measures microwave emission from ozone and chlorine monoxide, a major ozone destroying radical. Right after UARS was launched, MLS began to measure large concentrations of chlorine monoxide over the south pole. These dramatic images clearly showed the extent of the south polar ozone destruction and confirmed the connection between man-made chlorine and the formation to the Antarctic ozone hole. Why is so much chlorine monoxide found over the Antarctic? UARS measurements have confirmed that CFCs enter the stratosphere in the tropics. As they rise above the ozone layer, ultraviolet molecules release chlorine, which then can react with methane to form hydrogen chloride. Chlorine can also react with ozone forming the radical chlorine monoxide. Chlorine monoxide then combines with the radical nitrogen dioxide to form stable chlorine nitrate. Chlorine nitrate and hydrogen chloride are called reservoir gases for the chlorine radical. These reservoir gases usually contain more than ninety percent of the chlorine in the lower stratosphere.
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Side-by-side globes showing MLS measurements of ozone and chlorine monoxide over Antartica from 8-12-93 to 9-17-93.
Duration: 24.0 seconds
Available formats:
352x240 (29.97 fps)
MPEG-1
3 MB
160x80
PNG
16 KB
80x40
PNG
5 KB
320x242
JPEG
8 KB
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| Animation Number: | 837 |
| Animator: | Jesse Allen (Lead) |
| Studio: | NASA |
| Completed: | 1999-04-09 |
| Scientist: | Mark Schoeberl (NASA/GSFC) |
| Instrument: | UARS/MLS |
| Data Collected: | 1993/8/12-1993/9/17 |
| Series: | UARS |
| Video: | SVS1999-1001 * |
Keywords:
DLESE
>> Atmospheric science
DLESE
>> Chemistry
SVS
>> Chlorine Monoxide
DLESE
>> Climatology
SVS
>> Ozone
GCMD
>> Location
>> Antarctica
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More Information on this topic available at:
stories/UARS/index.html
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Please give credit for this item to
NASA/Goddard Space Flight Center
Scientific Visualization Studio |
*Please note: the SVS does not fulfill requests for copies of the tapes in our library. On some of our animation pages, there is a direct link to a video distribution service from which tapes, handled by the Public Affairs Office (PAO)/Goddard TV, including some of our animations may be ordered. General information on this service can be found here. |
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