Royal Meteorological Institute of Belgium

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Presentation transcript:

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

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

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

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 -0.6 mm and +0.6 mm Techniques intercomparison

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

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

▪ 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