The Atmospheric Ozone Layer
Beginning of paper
The stratospheric ozone layer exists at altitudes between about 10 and 40km
depending on latitude, just above the tropopause. Its existence is crucial for
life on earth as we know it, because the ozone layer controls the absorption of
a portion of the deadly ultraviolet (UV) rays from the sun. UV-A ....
Middle of paper
.... been used for several decades as a tracer for
stratospheric circulation. Initial measurements were made by ozonesondes
attached to high altitude balloons, by chemical-sondes or optical devices, which
measured ozone concentrations through the depletion of UV light.
However, the need to measure ozone concentrations from the surface at regular
intervals, led to the development of the Dobson spectrophotometer in the 1960s.
The British Antarctic Survey has the responsibility to routinely monitor
s ....
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Word count: 2378
Page count: 9 (approximately 250 words per page)
