R.S. Stolarski, P. Bloomfield, R.D. McPeters, J.R. Herman, "Total ozone trends deduced from Nimbus 7 TOMS data," Geophysical Research Letters, 18:1015-18, 1991.

Jay Herman (National Aeronautics and Space Administration Goddard Space Flight Center, Greenbelt, Md.): Ozone measurements, made for the past 14 years from NASA's Nimbus-7/TOMS orbiting satellite, show that the global ozone amount has declined by about 2.6 percent during the past decade. Larger ozone loss rates, 6 percent to 8 percent per decade, have been observed at mid- and high latitudes in both the northern and southern hemispheres. The largest ozone losses occur during the Antarctic spring in a region partially sealed off from the rest of the atmosphere by the polar vortex wind system. This year's Antarctic ozone hole shows a maximum depletion almost as low as last year's, but covering a larger area.

"Measurements of stratospheric chemical constituents within the Antarctic ozone hole region show that...

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