Publication Abstracts

Baldwin et al. 2007

Baldwin, M., M. Dameris, J. Austin, S. Bekki, B. Bregman, N. Butchart, E. Cordero, N. Gillett, H.-F. Graf, C. Granier, D. Kinnison, S. Lal, T. Peter, W. Randel, J. Scinocca, D. Shindell, H. Struthers, M. Takahashi, and D. Thompson, 2007: Climate-ozone connections. In Scientific Assesment of Ozone Depletion: 2006, Global Ozone Research and Monitoring Project Report No. 50. World Meteorological Organization.

The purpose of this chapter is to assess the effects of human-induced climate change and greenhouse gases on stratospheric ozone. Investigations of the relationships and feedbacks between ozone depletion and climate change processes have demonstrated that it is not possible to achieve a complete understanding of ozone changes without the consideration of climate change. This chapter primarily concentrates on how climate change affects stratospheric ozone. The effect of stratospheric ozone depletion on climate was a focus of the Intergovernmental Panel on Climate Change/Technology and Economic Assessment Panel special report. An increase of well-mixed greenhouse gas concentrations in the atmosphere leads to higher tropospheric temperatures (the greenhouse effect) and lower stratospheric temperatures. The rates of many chemical reactions are temperature dependent, and these reaction rates affect the chemical composition of the atmosphere. Reduced stratospheric temperatures lead to a slowing of some gas-phase reactions that destroy ozone, but also lead to intensified depletion of ozone in the lower polar stratosphere due to increased activation of halogens on polar stratospheric clouds (PSCs).

Since climate change processes influence the dynamics of the troposphere and the stratosphere, dynamically induced temperature changes could locally reinforce or oppose the temperature changes caused by radiative processes. These future changes are highly uncertain, with some models projecting that temperature will increase in the polar regions during northern winter and spring. The net effect of radiative, chemical, and dynamical interactions and feedbacks (many of which are nonlinear) is poorly understood and quantified at present.

Results of investigations presented in this chapter are based on observations and numerical modeling studies. Although atmospheric models have improved in recent years, they are still subject to uncertainties due to an incomplete description of atmospheric processes, their forcing, and their feedbacks. Weaknesses of models must be considered when evaluating calculated future changes, in particular for the assessment of the future evolution of the stratospheric ozone layer.

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BibTeX Citation

  author={Baldwin, M. and Dameris, M. and Austin, J. and Bekki, S. and Bregman, B. and Butchart, N. and Cordero, E. and Gillett, N. and Graf, H.-F. and Granier, C. and Kinnison, D. and Lal, S. and Peter, T. and Randel, W. and Scinocca, J. and Shindell, D. and Struthers, H. and Takahashi, M. and Thompson, D.},
  title={Climate-ozone connections},
  booktitle={Scientific Assesment of Ozone Depletion: 2006},
  publisher={World Meteorological Organization},

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RIS Citation

ID  - ba07200r
AU  - Baldwin, M.
AU  - Dameris, M.
AU  - Austin, J.
AU  - Bekki, S.
AU  - Bregman, B.
AU  - Butchart, N.
AU  - Cordero, E.
AU  - Gillett, N.
AU  - Graf, H.-F.
AU  - Granier, C.
AU  - Kinnison, D.
AU  - Lal, S.
AU  - Peter, T.
AU  - Randel, W.
AU  - Scinocca, J.
AU  - Shindell, D.
AU  - Struthers, H.
AU  - Takahashi, M.
AU  - Thompson, D.
PY  - 2007
TI  - Climate-ozone connections
BT  - Scientific Assesment of Ozone Depletion: 2006
PB  - World Meteorological Organization
ER  -

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