10h00-13h00 : Registration and Lunch at Meteo France conference center

13h00-13h45 : Welcome
V. Thouret: Organization and objectives
J. Logan: Summary of Boulder workshop
O. Tarasova : Ozone measurements in the Global Atmosphere Watch Programme

13h45-15h00 : Session 1 – Data analysis in the UT/LS, global analysis
10+3’ : V. Thouret (MOZAIC UTLS midlatitudes);
10+3’ : J. Staehelin (MOZAIC/GASP: Long-term ozone changes in UT/LS in the northern hemisphere);
10+3’ : M. Prather (Searching for the cause of the North-South asymmetry in tropopause ozone)
10+3’ : P. Hess (The impact of the stratosphere on tropospheric ozone trends: 1990-2009)
10+3’ : M. Lin (Variability and trends in springtime tropospheric ozone from 1981-2007:
 Exploring the roles of stratosphere-troposphere exchange and North American emissions)

10 minutes for discussion

15h00 – 16h00 : Coffee break and posters on UTLS, Asia, SH and tropics, methods (10)

16h00- 18h30 : Session 2 – Data analysis over Asia
15+5’ : A. Ding (Aircraft Measurement of Air Pollutants in China: Results from the MOZAIC program and the 2007 Northern China study)
12+3’ : H. Tanimoto given by J. Logan (Decadal trends in lower-tropospheric ozone over Japan during 1998-2008: Records at multiple sites and comparison to regional model simulations)
10+3’ : J. Logan (Sondes over Asia: Japan and Hong Kong)
10+3’ : R. Zbinden (Tropospheric ozone trends over JAPAN from 1995-2008 : a MOZAIC and WOUDC ozonesondes comparison);
10+3’ : T. Wang (Surface ozone concentrations at a non-urban coastal site (Hok Tsui, Hong Kong) in southern China, 1994–2010)
10+3’ : X. Xu (The trend and variability of surface ozone at the global GAW station Mt. Waliguan,China)
10+3’ : P. Cristofanelli (Surface ozone measurements at the Nepal Climate Observatory – Pyramid (PYR), global GAW-WMO station (Nepal, 5079 m a.s.l.) )
10+3’ : Arshinov (long-term monitoring of the ozone vertical distribution in the Siberian troposphere)

30 minutes for discussions and summary

18h30 – 19h30 : Cocktail and posters (all sessions)

Tuesday 12 April :
Top

08h30 – 10h30 : Session 3 – Data analysis over SH and Tropics:
12+3’ : I. Galbally (Long Term Trends in Ozone in the Southern Ocean Marine Boundary Layer and in the Southern Hemisphere Free Troposphere)
10+3’ : E. Brunke by H.E. Scheel (Analysis of ozone trends at the Cape Point GAW station, South Africa (34 °S))
10+3’ : J.P. Cammas (MOZAIC UT Tropics over Africa);
10+3’ : J. Ziemke by J. Rodriguez (A long-term satellite data set on tropospheric ozone column: status, availability, and future plans)
10+3’ : H. Morioka by Irina P. (Interannual variations of ozone in the tropical troposphere and tropopause region from the SHADOZ and other ozonesonde data sets);
10+3’ : F. Posny (Ozone-sonde measurements at Reunion Island : tropospheric ozone trends from 1992 to 2011.);
10+3’ : A.C. Nahas or A. Ilahi (Surface Ozone Measured at Tropical Marine-Background Bukit Kototabang, Indonesia);
10+3’ : S. Luppo (Surface ozone measurements at Ushuaia GAW Station.)

15 minutes for discussion and summary

10h30 – 11h00 : coffee break

11h00 – 13h00 : Session 4 – Updates of analyses over North America and Europe
15+5’ : J. Logan (Long-term changes in ozone over Europe – comparison of ozone measurements from sondes, regular aircraft (MOZAIC) and alpine surface sites, and implications for trends)
12+3’ : K. Law (Northern Hemisphere ozone trends: results from TF-HTAP)
12+3’ : D. Tarasick (Changes in the vertical distribution of ozone over Canada from ozonesondes: 1980-2010)
10+3’ : R. Kivi (Trends in tropospheric ozone over northern high-latitude ozonesonde stations)
10+3’ : G. Ancellet (Analysis of a 25-yr ozone profile data set recorded at Observatoire de Haute Provence (OHP), Southern France); 
10+3’ : R. Derwent (Trends and annual variability in intercontinental baseline flows of ozone into north west Europe observed at Mace Head, Ireland 1989–2009)
10+3’ : R. Wilson (Have primary emissions reduction measures reduced ozone across Europe? Analysis of European Ozone Trends 1996-2005)
10+3’ : M. Vana (Long – term trends of surface ozone in the Czech Republic)

13h00 – 14h00 : Lunch

14h00 – 15h00 : Poster session: North America / Europe, and model studies (13)

15h00 – 16h00 : Session 4 continued: 2 talks by
12+3’ : S. Gilge (Trend of near surface ozone at Hohenpeissenberg Meteorological Observatory in comparison to the other GAW-DACH-sites Sonnblick, Jungfraujoch and Zugspitze);
12+3’ : B. Galleithner (Tropospheric ozone trends at Central European sounding stations and mountain sites)

30 minutes for discussion and summary

16h00 – 16h30 : Coffee break
16h30 – 18h00 : Session 5 – Discussion session: State-of-the-art and future needs
Deliverables from this workshop

Wednesday 13 April :
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08h30 - 10h30 : Session 6 – Evaluation of long-term model runs
12+3’ : L. Pozzoli by F. Dentener (Reanalysis of tropospheric sulphate aerosol and ozone for the period 1980-2005 using ECHAM5-HAMMOZ)
12+3’ : K. Sudo (Interannual trend and variability in global tropospheric ozone during 1970-2009 simulated in the CHASER model)
12+3’ : A. Strunk (Influence of meteorology and increasing anthropogenic emissions on the vertical distribution of tropospheric O 3 near the Asian continent for the period 2000- 2008)
12+3’ : P. Zanis (Regional climate - air quality simulations with RegCM3/CAMx over Europe for the period 1990-2001: Validation of simulated near surface ozone with observations from the EMEP network)
12+3’ : M. Schultz (Detecting tropospheric ozone trends in long-term (global) model simulations)
12+3’ : C. Granier (Evolution of the distribution of tropospheric ozone and its precursors during the 1997-2008 period)
12+3’ : L. Oman by A. Douglass (New Insights in Tropospheric Ozone and its Variability)

15 minutes for discussion and summary

10h30 – 11h00 : coffee break

11h00 – 13h00 : Session 7 – Common methodologies and standard data sets
Discussion on the following topics (list can be extended if desired):
- Can we all agree on common time periods for the assessment of past trends?
- Can we agree on a common data format (including sampling frequency)?
- Are there universal methods for filtering time series (background, wind sectors, …)?
- Is there a need to define a subset of measurements for model evaluation?
- Is there a common, robust method to evaluate models with ozone data?
- How can we use the data to identify poorly represented processes in models?

The discussion may be preceeded by one or two seed presentations:

12+3’ : M. Saunois (Effect of sampling frequency on ozone trends: Lessons from MOZAIC.);
12+3’ : A. Lefohn (Methodology and Results for Identifying Changes in Surface Ozone Levels in the US for 1980-2009 and 1995-2009)

13h00 – 14h00 : Lunch

14h00 – 15h30 : Joint session with ACCMIP
2:00-2:30: D. Shindell/J.-F. Lamarque: Overview of ACC-MIP
2:30-2:30: P. Monks : IGAC ACC
2:30-3:00: M. Schultz: Summary of Tropospheric Ozone Workshop and Model evaluation
3:00-3:30: I. Bey/C. Granier/F. Dentener: 1980-2010 hindcast

15h30 – 16h00 : Coffee break

16h00 – 18h00 : Session 7 : Wrap up, summary
What have we learned?
Future activities: formal intercomparison, next workshop(s), organisation of a review article
framework of future workshops (endorsement by international programme, etc.)


POSTERS (29)
Top

UTLS, Asia, SH and tropics (7):

• B.D. Belan (Long-term variability of surface ozone concentration near Tomsk and its prediction for the solar activity cycle 24)
• F. Ebojie (Tropospheric ozone climatology derived from SCIAMACHY limb-nadir matching observations.)
  
• S. Oltmans (Long-term tropospheric ozone variations at background measurement sites.);
  
• D. Plummer (seasonal cycle around the tropopause)
• K. Shibata (Simulation of tropospheric ozone in the past, present and future with a chemistry climate model of Meteorological Research Institute)
• V. Thouret (MOZAIC over India and Caracas)
  
• C. Zellweger (Surface Ozone Variability and Trends at the Global GAW Stations Assekrem (Algeria), Bukit Koto Tabang (Indonesia) and Mt. Kenya (Kenya))
  

• S. Fuzzi (ACCENT-Plus: linking science and policy needs in atmospheric composition change)
• C. Zellweger (Summing-up audit results of the World Calibration Centre for Surface Ozone (WCC-Empa) obtained during the past 15 years)
  

• K. Boersma (Significant trends in tropospheric nitrogen oxide concentrations observed over Europe from the Ozone Monitoring Instrument)
• G. Clain (European surface trends in ozone, 1990-2007, a modelling study)
  
• P. Cristofanelli (Analysis of O3, CO and BC variability at the Mt. Cimone GAW-WMO regional station (Italy, 2165 m a.s.l.) by using FLEXPART analyses)
  
• A. Delcloo (Trends in ozone concentrations for the long term ozonesonde observation record in the troposphere and the stratosphere for Uccle)
  
• S. Eckhardt (The impact of North American emissions on carbon monoxide and ozone concentrations over Europe)
  
• Z. Fleming (Untangling the influence of air mass origin on ozone and ozone precursor measurements at the Weybourne and Cape Verde Atmospheric Observatories)
  
• F. Gheusi (Ozone trends at remote surface stations in France from the PAES network)
  
• S. Henne (European trends of surface O3 and Ox evaluated with Generalised Additive Models)
  
• E. Katragou (Regional climate-air quality simulations for the reference decade 1991-2000: Impact of meteorological forcing on surface ozone over Europe.)
  
• A. Ladstaetter-Weissemayer (First Steps in the Validation of Tropospheric Ozone from Limb-Nadir-Matching with SCIAMACHY)
  
• Irina P. (An Analysis of Tropospheric Ozone over Boulder, CO)
  
• H.E. Scheel (Analysis of ozone trends at the mountain sites Zugspitze and Wank (47 °N)
  
• I. Senik (The peculiarities of inter-annual variability of surface ozone at Kislovodsk High Mountain Station (43.73oN, 42.66oE, 2070 m a.s.l., Northern Caucasus ))
  
• J. Staufer (Comparison of ozone measurements of MOZAIC with ozonesondes based on backward trajectory analysis)
  
• D. Tarasick (Tropospheric Ozone Maps from the Trajectory Mapping of Global Ozonesonde Data)
• S. Tilmes (Ozonesonde climatology for Model Evaluation of the Troposphere and Lower Stratosphere)
  
• V. Thouret (MOZAIC over Frankfurt and Vienna)
  
• V. Thouret (MOZAIC over NewYork and Dallas)
  
• A. Voulgarakis (Interannual variability of tropospheric ozone and its precursors: exploring biomass burning emissions as a potential driver)
• R. Zbinden (Tropospheric ozone trends deduced from MOZAIC time-series (1995-1998) with fully defined individual tropospheric columns over Eastern USA, GERMANY, JAPAN);