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Studies of the ozone budget using a zonal mean circulation model and linearized photochemistry
Author(s) -
Harwood R. S.,
Pyle J. A.
Publication year - 1977
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.49710343609
Subject(s) - ozone , atmospheric sciences , stratosphere , latitude , middle latitudes , environmental science , troposphere , eddy , flux (metallurgy) , climatology , northern hemisphere , circulation (fluid dynamics) , meteorology , geology , chemistry , physics , mechanics , turbulence , geodesy , organic chemistry
Abstract A two‐dimensional, time‐dependent numerical model of the atmosphere has been used to investigate the ozone budget. the photochemistry includes catalytic destruction of ozone by the oxides of hydrogen and nitrogen with the source and sink terms linearized about the equilibrium values. the behaviour of the modelled ozone is quite satisfactory especially in low and mid‐latitudes. Many of the observed details have been reproduced ‐ including hemispheric asymmetries of the total ozone amounts. The salient features of the ozone budget are described. There is photochemical production in the mid‐stratosphere in low latitudes, with destruction in the high latitudes of both hemispheres. the mean motion fluxes are the most important transport term in equatorial latitudes. Polewards, the eddies become relatively more important. A feature of the model is the near‐cancellation between mean and eddy flux divergences in middle and high latitudes. the vertical eddies play only a minor role. The hemispheric asymmetry in the total ozone amount results in part from the high‐latitude mean circulation driven by the eddy fluxes of angular momentum. Tropospheric processes also are responsible for some differences between the hemispheres.