Preconditioning and ozone hole filling in the Antarctic Spring

Details Preconditioning and ozone hole filling in the Antarctic Spring Preconditioning and ozone hole filling in the Antarctic Spring

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991papge.136..211m&link_type=abstract

Pure and Applied Geophysics PAGEOPH, Volume 136, Issue 2-3, pp. 211-216

Physics

Geophysics

Ozone Hole, Preconditioning, Circumpolar Vortex, Planetary Waves, Zonal Wind, Stratospheric Warming, Diabatic Heating, Tracer Transport

Scientific paper

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.

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