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Causes and Effects of Stratospheric Ozone Reduction An Update (1982) / Chapter Skim
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B STRATOSPHERIC PERTURBATIONS--THE ROLE OF DYNAMICS, TRANSPORT, AND CLIMATE
Pages 159-166

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From page 159...
... Furthermore, atmospheric transport between troposphere and stratosphere determines the concentrations of the various chemical families that determine the catalytic destruction of ozone. In particular, the transport of organic chlorine species from the troposphere to levels above 25 km provides the radical chlorine species whose effect is of special concern here.
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From page 160...
... However, currently projected ozone change profiles imply a much larger change in the energy balance of the tropospheric energy balance than was inferred from ozone profile change estimates of two years ago. PROGRESS IN QUANTITATIVE MODELS OF TRANSPORT One-Dimensional Models Current evaluations of possible ozone depletion are still primarily based on one-dimensional empirical diffusion transport models.
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From page 161...
... that a number of ~ empirical transport models were on the verge of completion. About a dozen of these models are now operational, but at the time of the May 1981 NASA workshop only one such model had obtained a projection of steady state ozone depletion with currently recommended chemical rates.
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From page 162...
... . Transport in the latitudealtitude plane depends on the phase relationships between poleward and vertical eddy velocities, and the relative magnitude of the photochemical source terms compared to advective transport by motions.
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From page 163...
... primarily because of the recent changes in the assumed chemical rate constants for the lower stratosphere and consequent ozone perturbations there. In particular, small increases of O3 in the lower stratosphere, as now inferred in steady state CFM scenarios, imply a warmer tropical tropopause (as does the direct radiative heating by the CFMs)
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From page 164...
... This conclusion is very important for the development of two-dimensional chemical models for it provides a simple means to include temperature feedback in photochemical sensitivity studies. The recommended procedure is to assume observed temperature structure plus whatever temperature changes are needed to balance changes in radiative heating due to changes in ozone.
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From page 165...
... Washington, D.C.: National Academy of Sciences. National Research Council (1979b)
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From page 166...
... The role of stratospheric ozone in the zonal and seasonal radiative energy balance of the earth-troposphere system. Journal of Atmospheric Sciences 36:1084-1104.
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Key Terms

  • stratospheric ozone
  • ozone depletion
  • global average
  • direct radiative
  • lower stratosphere

  • energy balance
  • radiative heating
  • chlorine species
  • average ozone
  • catalytic destruction

  • change due
  • tracer species
  • stationary planetary
  • thermal structure
  • atmospheric transport

  • stratospheric change
  • simple model
  • temperature changes
  • steady state
  • anticipated ozone

  • planetary wave
  • eddy diffusion
  • radiative effects
  • circulation model
  • temperature structure

  • stratospheric transport
  • ozone concentrations
  • infrared cooling
  • recommended procedure
  • major improvement


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