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

Journal Article · Mon Apr 01 04:00:00 EST 1991 · Geophysical Research Letters (American Geophysical Union); (United States)

DOI:https://doi.org/10.1029/91GL00363· OSTI ID:5406687

Deshler, T ^[1]; Hofmann, D J ^[2]

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1. Univ. of Wyoming, Laramie (United States)
2. NOAA Climate Monitoring and Diagnostics Lab., Boulder, CO (United States)

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 9 October, when the ozonesonde was at it's 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.

• OSTI ID: 5406687
• Journal Information: Geophysical Research Letters (American Geophysical Union); (United States), Journal Name: Geophysical Research Letters (American Geophysical Union); (United States) Vol. 18:4; ISSN GPRLA; ISSN 0094-8276
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ANTARCTIC REGIONS
ANTARCTICA
ATMOSPHERIC CHEMISTRY
CHEMISTRY
DISTRIBUTION
EARTH ATMOSPHERE
ECOLOGICAL CONCENTRATION
LAYERS
LOSSES
MONITORING
OZONE
OZONE LAYER
POLAR REGIONS
SEASONAL VARIATIONS
STRATOSPHERE
TEMPERATURE MONITORING
VARIATIONS
VORTICES