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Preconditioning and ozone hole filling in the Antarctic Spring

Mukku, V.N.R. (1991) Preconditioning and ozone hole filling in the Antarctic Spring. Pure and Applied Geophysics, 136 (2-3). pp. 211-216.

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The temporal variations in mean zonal wind, horizontal temperature gradient at 30 mb and Total Ozone in Antarctic Spring (1 Sept.-30 Nov.) for nine seasons (1979-1987) were examined. The ozone hole filling commenced when the zonal flow decelerated to 50-58 m.sec-1 at 30 mb. Our calculation of Rossby critical wave number with vertical shear suited for Antarctic Spring indicated that flow is preconditioned for vertical propagation of Rossby critical wave number two at this range of zonal flow. This preconditioning can be attributed to the diabatic heating in the Antarctic Spring since no sudden minor warmings/coolings have occurred during the period.

Item Type: Article
Additional Information: Copyright of this article belongs to Birkhauser
Uncontrolled Keywords: circumpolar vortex; diabatic heating; ozone hole; planetary wave; stratospheric warming; tracer transport; zonal wind, Antarctica
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 02 May 2015 04:35
Last Modified: 02 May 2015 04:35

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