Abstract
The Polar SWIFT model is a fast scheme for calculating the chemistry of stratospheric ozone depletion in the polar vortex in winter. It is intended for use in General Circulation Models (GCMs) and Earth System Models (ESMs) to enable the simulation of interactions between the ozone layer and climate, when a full stratospheric chemistry scheme is computationally too expensive. Many GCMs do not include a usable general scheme for the transport and mixing of chemical species in the stratosphere. When using the Polar SWIFT model in a GCM, it is usually necessary to parameterize the transport of ozone in order to obtain the total change of ozone as the sum of the change by transport and by chemistry. We present a transport parameterization for the Polar SWIFT model that simulates the change of vortex-averaged ozone by transport in a fast and simple way without the need for a complex transport scheme in the GCM.
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