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26.1 MB (1.7 MB compressed)
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20.8 x 31.5 cm ⏐ 8.2 x 12.4 in (300dpi)
MICHAEL GILBERT / SCIENCE PHOTO LIBRARY MICHAEL GILBERT / SCIENCE PHOTO LIBRARY
Artwork showing the severe depletion or "hole" in the ozone layer over Antarctica (white landmass). The ozone layer absorbs most of the Sun's ultra- violet (UV) radiation; it occurs at an altitude of 14-24km, but is most concentrated at 17-21km (shown in white). The hole lets through the UV (purple). Altitudes are given by a Boeing 727 (12km), a Concorde (15km), & the ER-2 research plane (18km) used by NASA to investigate the hole. The hole first appeared in 1980, & has grown more severe each year. It is a seasonal phenomenon that occurs in the Antarctic spring. It is probably due to atmospheric pollution by chlorofluorocarbons (CFCs), chemicals used in aerosols & refrigerants. This is version WITHOUT the lettering naming the three aircraft. Verion with the lettering is.
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