Tropospheric ozone long term trend observed by lidar and ECC ozonesondes at Observatoire de Haute Provence, Southern France.

Gerard Ancellet, CNRS, Latmos, Paris Cedex 16, France, Audrey Gaudel, CIRES, U. of Colorado/ NOAA Chemical Sciences Laboratory, Boulder, United States and Sophie Godin-Beekmann, CNRS, LATMOS, Paris, France