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Lagrangian Transport Calculations Using UARS DataTrajectory calculations are used to examine ozone transport in the polar winter stratosphere during periods of the Upper Atmosphere Research Satellite (UARS) observations. The value of these calculations for determining mass transport was demonstrated previously using UARS observations of long-lived tracers, In the middle stratosphere, the overall ozone behavior observed by the Microwave Limb Sounder in the polar vortex is reproduced by this purely dynamical model. Calculations show the evolution of ozone in the lower stratosphere during early winter to be dominated by dynamics in December 1992 in the Arctic. Calculations for June 1992 in the Antarctic show evidence of chemical ozone destruction and indicate that approx. 50% of the chemical destruction may be masked by dynamical effects, mainly diabatic descent, which bring higher ozone into the lower-stratospheric vortex. Estimating differences between calculated and observed fields suggests that dynamical changes masked approx. 20% - 35% of chemical ozone loss during late February and early March 1993 in the Arctic. In the Antarctic late winter, in late August and early September 1992, below approx. 520 K, the evolution of vortex-averaged ozone is entirely dominated by chemical effects; above this level, however, chemical ozone depletion can be partially or completely masked by dynamical effects. Our calculations for 1992 showed that chemical loss was nearly completely compensated by increases due to diabatic descent at 655 K.
Document ID
19990008385
Document Type
Reprint (Version printed in journal)
Authors
Manney, Gloria L. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Zurek, R. W. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Froidevaux, L. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Waters, J. W. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
ONeill, A. (Centre for Global Atmospheric Modelling Reading, United Kingdom)
Swinbank, R. (Meteorological Office Bracknell, United Kingdom)
Date Acquired
August 19, 2013
Publication Date
September 1, 1995
Publication Information
Publication: Journal of the Atmospheric Sciences
Volume: 52
Issue: 17
Subject Category
Geophysics
Distribution Limits
Public
Copyright
Other