Ozone profiles at McMurdo Station, Antarctica during the austral spring of 1992

Journal Article · Tue Feb 15 04:00:00 EST 1994 · Geophysical Research Letters (American Geophysical Union); (United States)

DOI:https://doi.org/10.1029/93GL02854· OSTI ID:7113437

Johnson, B J; Deshler, T; Rozier, W R ^[1]

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1. Univ. of Wyoming, Laramie, WY (United States)

Thirty-seven vertical profiles of ozone and temperature were measured at McMurdo Station, Antarctica (78[degrees]S) from 23 August to 31 October 1992. Total column ozone dropped from an initial 223 Dobson Units (DU) on 24 August to 158 DU on 27 September. The 12-20 km column reached a record low of 17 DU on 9 October, an 84% loss compared to the initial value of 106 DU. The most severely depleted layer was between 12 and 15 km which coincided with the volcanic aerosol layer (11-16 km) observed by aerosol counter flights and the Italian Lidar at McMurdo. By the end of September the polar vortex elongated and shifted away from McMurdo. Subsequent profiles, above 20 km altitude, were typically 15-20[degrees]C warmer and ozone concentrations were 50-100% higher for the remainder of the measurement period. The 12-16 km layer, however, remained 80 to 97% depleted compared to the initial profile. 9 refs., 5 figs.

• OSTI ID: 7113437
• Journal Information: Geophysical Research Letters (American Geophysical Union); (United States), Journal Name: Geophysical Research Letters (American Geophysical Union); (United States) Vol. 21:4; ISSN GPRLAJ; ISSN 0094-8276
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AEROSOLS
ALTITUDE
AMBIENT TEMPERATURE
ANTARCTIC REGIONS
ANTARCTICA
COLLOIDS
CRYOSPHERE
DISPERSIONS
ECOLOGICAL CONCENTRATION
FLUIDS
GASES
OZONE
POLAR REGIONS
SOLS
VOLCANIC GASES