THESEO is supported by the European Commission - DG XII - Environment and Climate Programme

Description:

THESEO is an ambitious field programme of wide-ranging activities throughout the northern hemisphere with measurements being made by instruments on balloons, aircraft and the ground. Its primary goal is to improve our understanding of the processes underlying the observed mid-latitude trends. THESEO is supported through EC's Environnement and Climate Programme (12 projects in total) and by many national funding agencies. For more detail, see Ozone Coordinating Unit at http://www.ozone-sec.ch.cam.ac.uk/

CNRS / SA Contributions:

- METRO
A project to study the meridional transport of ozone in the lower stratosphere

- Lagrangian Experiment
A project of long duration balloon flights in the polar vortex during the winter of 1998-99.

- O₃ Loss
A project dedicated to the evaluation of the amount of ozone loss in the Arctic and at mid- latitude.

- BrO
A study of the role of bromine coumpounds in ozone destruction