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  Information - AS3.01 Past and Future Changes in Mid-Latitude Ozone (co-listed in CL)

Event Information
Stratospheric ozone changes at mid-latitudes have been documented by several International Ozone Assessments since the early nineties. Factors such as the dilution of polar ozone loss, the presence of volcanic aerosols and a change in large scale diabatic transport have been shown to contribute to these changes but a quantitative understanding of the balance between chemical and dynamical processes still has to be reached. Issues such as observed inter-hemispheric difference in the evolution of ozone and the influence of the solar cycle in the lower stratosphere remain quantitatively unresolved. There is also considerable disagreement between climate chemistry models as to the dominant influence on mid-latitude ozone in the future.

This session aims at presenting the latest developments on past ozone changes at mid-latitudes as well as studies on future ozone changes in this region. It will focus on the following themes:
•Impact of polar ozone depletion and other chemical processes on mid-latitude ozone in the long term.
•Long term changes in large scale transport and their influence on ozone variations.
•Signature of major tropospheric teleconnection patterns.
•Inter-hemispheric ozone differences.
•Past and future long term ozone simulations.

Preliminary List of Solicited Speakers
Martin Dameris
Johannes Staehelin
Yvan Orsolini

International Ozone Commission (IO3C)

General Statement
The information contained hereafter has been compiled and uploaded by the Session Organizers via the "Organizer Session Form". The Session Organizers have therefore the sole responsibility that this information is true and accurate at the date of publication, and the conference organizer cannot accept any legal responsibility for any errors or omissions that may be made, and he makes no warranty, expressed or implied, with regard to the material published.

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