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65.2 MB (5.9 MB compressed)
5327 x 4278 pixels
45.2 x 36.3 cm ⏐ 17.8 x 14.3 in (300dpi)
NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
Satellite map showing a severe depletion or "hole" in the ozone layer over Antarctica on October 2, 1986 - the Antarctic spring. The hole is probably due to pollution of the atmosphere by chlorofluor- ocarbons used in aerosols & refrigerants. First seen in 1980, the hole has grown each year since. It reaches a maximum in mid-October. It is visible as the oval area at centre, coloured purple, black & grey. Antarctica is outlined in white. The colours stand for Dobson units, a measure of atmospheric ozone, as shown in the colour scale at right. The map was made by the Total Ozone Mapping Spectrometer (TOMS) on the American Nimbus-7 weather satellite.
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