Ozone profiles at McMurdo Station, Antarctica, the austral spring of 1990

Details Ozone profiles at McMurdo Station, Antarctica, the austral spring of 1990 Ozone profiles at McMurdo Station, Antarctica, the austral spring of 1990

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18..657d&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, April 1991, p. 657-660. NSF-supported research.

Physics

10

Antarctic Regions, Ozone Depletion, Ozonometry, Temperature Profiles, Balloon-Borne Instruments, Spring (Season), Vertical Distribution

Scientific paper

Vertical profiles of ozone and temperature were measured on 40 occasions during the austral spring of 1990 at McMurdo Station, Antarctica, and once again near record levels of ozone depletion were observed. Total ozone decreased from 260 DU in late August to its minimum value of 145 DU on October 9, when the ozonesonde was at its lower detection limit from 15 to 16.5 km. Ozone reductions were observed almost exclusively between 12 and 20 km, with a half life of 20 days. This is similar to previous years. Although McMurdo was within the polar vortex for most of the period, there were several occasions when the edge of the vortex was over McMurdo. During these periods, ozone above 20 km approximately doubled, but below 20 km remained relatively unchanged.

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