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An isentropic two‐dimensional model with an interactive parameterization of dynamical and chemical planetary‐wave fluxes
Author(s) -
Kinnersley Jonathan S.,
Harwood Robert S.
Publication year - 1993
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.49711951315
Subject(s) - potential vorticity , rossby wave , isentropic process , physics , atmospheric sciences , vorticity , mechanics , vortex
An interactive chemical‐dynamical isentropic two‐dimensional model is described, and its behaviour analysed when a parameterization of the three longest Rossby wave is included in the model. Eddy fluxes of chemicals and of Ertel's potential vorticity are all calculated from the modelled waves, and are therefore consistent with each other. The chemical fluxes arise from dissipation of zonal asymmetries, both by photo‐chemistry (‘chemical eddy’ fluxes) and by ‘planetary wave breaking’. The chemical eddy fluxes for ozone and No y are much larger than the wave‐breaking ones, and thus the diffusion matrix (which has only one non‐zero element) is far from being independent of chemical species. The waves have a large immediate effect on the ozone distribution, but the effect persists throughout the year only when the wave fluxes induced a persistent change in the photochemical equalibrium state for ozone (mainly by changing NO x ).