Influence of Ozone Content Loss in the Lower Stratosphere
on the Radiative Balance of the Troposphere

T. A. Egorova, I. L. Karol’, and E. V. Rozanov

Voeikov Main Geophysical Observatory, ul. Karbysheva 7, St. Petersburg, 194018 Russia

Received November 20, 1995; in final form, July 18, 1996

Abstract—A time-dependent radiative convective climate model is used to estimate the effect of ozone loss on
the radiative balance of the earth–troposphere system. Estimates of the thermal relaxation time of the lower
stratosphere are presented. The influence of ozone drop pulses of an idealized and an actual shape on radiative
forcing is estimated. A comparison of results obtained by means of steady- state and time-dependent models
revealed that the steady-state estimates can overestimate the values of radiative forcing up to 40% depending
on the shape of ozone drop pulses.

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