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Antarctic ozone depletion
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Antarctic ozone depletion
Ozone depletion over Antarctica (1998). Coloured satellite map of atmospheric ozone in the southern hemisphere between mid-August and early October 1998. An ozone " hole" is seen over Antarctica. Depletion of ozone reached a record size of 10.5 million square miles on 19-09-98; ozone levels fell to 90 Dobson units on 30-09-98, one of the lowest recorded. Colour-coding in Dobson Units (DU): yellow to red (300-340 DU), green to blue (280-200 DU), dark blue (200-100 DU). The ozone hole is due to atmospheric pollution, reaching a maximum around October, the Antarctic spring. Data from the TOMS instrument aboard TOMS-EP satellite; and the SBUV instrument aboard NOa-14 satellite
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Media ID 6374347
© NASA/SCIENCE PHOTO LIBRARY
1998 Antarctic Antarctica Atmosphere Earth Science Ozone Depletion Ozone Hole Sciences
EDITORS COMMENTS
This print showcases the alarming phenomenon of Antarctic ozone depletion. The coloured satellite map, taken between mid-August and early October 1998, vividly displays the extent of atmospheric ozone loss in the southern hemisphere. Over Antarctica, a prominent "hole" in the ozone layer is clearly visible, serving as a stark reminder of our planet's vulnerability. On September 19th, 1998, this ozone depletion reached an unprecedented size of 10.5 million square miles – a distressing record that highlights the urgency to address this environmental crisis. By September 30th, ozone levels plummeted to a concerning low of only 90 Dobson units – one of the lowest ever recorded. The colour-coding on this map provides further insight into these measurements: areas ranging from yellow to red represent higher concentrations (300-340 DU), while green to blue shades indicate moderate levels (280-200 DU). Dark blue regions signify even lower readings (200-100 DU). Attributed primarily to atmospheric pollution and peaking during October's Antarctic spring season, the formation of this ozone hole poses significant threats to our planet's delicate balance. This invaluable data was collected using advanced instruments such as TOMS aboard TOMS-EP satellite and SBUV aboard NOa-14 satellite. As we gaze upon this image captured by Science Photo Library in 1998, it serves as both a testament to scientific progress and a call for action towards preserving Earth's precious protective shield - its ozone layer.
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