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Royal Meteorological Institute of Belgium

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Presentation on theme: "Royal Meteorological Institute of Belgium"— Presentation transcript:

1 Royal Meteorological Institute of Belgium
1 Royal Observatory of Belgium 2 Belgian Institute for Space Aeronomy 3 Max Planck Institute for Chemistry 4 Solar-Terrestrial Centre of Excellence 5 The Integrated Water Vapour project in Belgium: techniques intercomparison and time series analysis R. Van Malderen1,5, E. Pottiaux2,5, H. Brenot3,5, S. Beirle4, C. Hermans3, M. De Mazière3, T. Wagner4, H. De Backer1 and C. Bruyninx2,5

2 IWV techniques intercomparison Techniques intercomparison
ROB IWV techniques intercomparison total column water vapour GOME/SCIAMACHY/GOME-2 AIRS CIMEL sun photometer radiosondes GPS (IGS) satellite ground-based NASA GNSS4SWEC, WG3 Valencia, Spain 16-17 October 2013 Techniques intercomparison

3 Techniques intercomparison
ROB selection of 28 sites world-wide (NH), with focus on CIMEL- GPS co-location and based on meteo data availability (GPS)! altitude correction between data (raw data, meteo data and IWV data) gathered at sites with different altitudes! GNSS4SWEC, WG3 Valencia, Spain 16-17 October 2013 Techniques intercomparison

4 Techniques intercomparison
ROB Impact of cloud cover??? R2 = 0.993 y = 0.984x GPS-CIMEL GPS-RS9x Brussels GPS-AIRS GPS-GOMESCIA GNSS4SWEC, WG3 Valencia, Spain 16-17 October 2013 bias with GPS ranges between mm and +0.6 mm Techniques intercomparison

5 Techniques intercomparison
ROB GPS - CIMEL GPS - RS GPS - GOMESCIA GPS - AIRS scatter plot properties for the 28 co-locations, ordered with increasing latitute from left to right geographical dependency? GNSS4SWEC, WG3 Valencia, Spain 16-17 October 2013 Techniques intercomparison

6 Techniques intercomparison
ROB GPS - CIMEL GPS - RS GPS - GOMESCIA GPS - AIRS scatter plot properties for the 28 co-locations, ordered with increasing latitute from left to right geographical dependency? GNSS4SWEC, WG3 Valencia, Spain 16-17 October 2013 Techniques intercomparison

7 ▪ IWV trends for all IGS stations starting in 1995/1996 ○
ROB IWV trends for all IGS stations starting in 1995/1996 geographical inconsistencies Are these related with the chosen database for meteorological parameters (NCEPDOE)? What are the ERA- interim and GOME (2)/SCIAMACHY trends at these stations? ● ○ □ ▪ IWV ↗ IWV ↗ significantly IWV ↘ IWV ↘ significantly GNSS4SWEC, WG3 Valencia, Spain 16-17 October 2013 Sensitivity analysis/trends

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