Ozone Vertical Distribution Best Estimate from Different Ground-Based Measurement Techniques at Haute-Provence Observatory
Thursday, 17 December 2015
Poster Hall (Moscone South)
Within the Network for the Detection of Atmospheric Composition Changes (NDACC), various measurement techniques have been deployed for the monitoring of ozone vertical distribution at Observatoire de Haute-Provence (44°N, 6°E) in Southern France, since the end of the 1980s. These techniques include two ozone lidars for the measurement of stratospheric and tropospheric ozone vertical profiles, in situ ozone soundings and Dobson Umkehr measurements. The monitoring of ozone on such a long time span allows us to evaluate the strengths and weaknesses of the various techniques in terms of precision and vertical resolution for the evaluation of long-term trends. The present study focuses on the comparison of ozone profiles data series and explores the possibility of integrating the various measurements in order to provide stratospheric and tropospheric ozone partial columns, and ozone vertical distribution information. Long-term ozone trends are estimated in the stratosphere from the individual and merged data series and compared to those derived from merged satellite data sets. OHP ozone products are also compared to similar products obtained in nearby stations such as Hohenpeissenberg (Germany) or Bern (Switzerland).