1. GEWEX, needs of the water cycle modeling community and SWOT Peter van Oevelen (Eric Wood) Presentation for SWOT Workshop, September 15-17, 2008, The Ohio State University, Columbus Ohio Presentation for SWOT Workshop, September 15-17, 2008, The Ohio State University, Columbus Ohio

2. Outline GEWEX structure GEWEX structure – Introduction: where, what, why, how etc. Rationale for SWOT and links to GEWEX’s Panels and activities Rationale for SWOT and links to GEWEX’s Panels and activities Other international bodies to be considered Other international bodies to be considered

3. The Tools Theory Modelling Observations Observational Data Sets Models and Parameterizations Application Products GEWEX Radiation Panel GEWEX Modelling and Prediction Panel Coordinated Energy and Water Cycle Observations Project GEWEX achieves its goals through data set development and analysis, process studies and model improvement

5. PANELS Working Groups And Projects GEWEX Regional Data Sets Data projects and centers under the GEWEX umbrella Related information can be found at: http://www.gewex.org

6. Some of the Rationale Global Data Sets of surface water (rivers and lakes) level data Global Data Sets of surface water (rivers and lakes) level data – By itself useful for monitoring purposes e.g. flood mapping, lake storage etc. Contribution to the Global Runoff Data Centre global discharge data sets Contribution to the Global Runoff Data Centre global discharge data sets – Counter measure against diminishing numbers of run-off gauges Closure of regional and global water budgets Closure of regional and global water budgets Evaluation/Verification of Hydrological Models – output Evaluation/Verification of Hydrological Models – output Calibration of Hydrological Models Calibration of Hydrological Models Input to Hydraulic Models Input to Hydraulic Models River and lake information for Ungauged Basins River and lake information for Ungauged Basins

7. GRP – GEWEX Radiation Panel Land Flux Initiative: Land Flux Initiative: – Global data sets of turbulent fluxes over land (LE, SM, etc.) – Follow-up to ISLSCP (International Satellite Land Surface Climatology Program) GRP aims at long term data sets with strict data quality control GRP aims at long term data sets with strict data quality control Both integrated and single sensor data sets Both integrated and single sensor data sets

8. CEOP GRDC – Global Runoff Data Center (Affiliated with GEWEX-CEOP) GRDC – Global Runoff Data Center (Affiliated with GEWEX-CEOP) Regional Data Sets Regional Data Sets – Regional Hydroclimate Projects (Former CSE’s) Hydrological Applications Project Hydrological Applications Project – Hydrological Test beds CEOP Cross-cutting activities: CEOP Cross-cutting activities: – Monsoons, High Elevation, Modelling, Water and Energy Budget Studies

9. GMPP GMPP is GEWEX Model Development Panel GMPP is GEWEX Model Development Panel New land surface schemes and parameterizations based upon ‘new’ type of data New land surface schemes and parameterizations based upon ‘new’ type of data Assimilation procedures Assimilation procedures At what scales will SWOT data be most useful and applicable -> which models (local hydrological models to NWP) At what scales will SWOT data be most useful and applicable -> which models (local hydrological models to NWP)

10. GCOS Terrestrial Climate variables River discharge, Water use, Ground water, Lake levels, River discharge, Water use, Ground water, Lake levels, Snow cover, Glaciers and ice caps, Permafrost and seasonally-frozen ground, Snow cover, Glaciers and ice caps, Permafrost and seasonally-frozen ground, Albedo, Land cover (including vegetation type), Fraction of absorbed photosynthetically active radiation (fAPAR), Leaf area index (LAI), Biomass, Fire disturbance, Albedo, Land cover (including vegetation type), Fraction of absorbed photosynthetically active radiation (fAPAR), Leaf area index (LAI), Biomass, Fire disturbance, Soil moisture[Emerging]. Soil moisture[Emerging].

11. Other Obvious International Links GTN-H: Global Terrestrial Network – Hydrology GTN-H: Global Terrestrial Network – Hydrology GWSP : Global Water Systems Project as part of the Earth System Science Partnership (ESSP) GWSP : Global Water Systems Project as part of the Earth System Science Partnership (ESSP) UNESCO-IHP and PUB UNESCO-IHP and PUB GEO and its GEOSS GEO and its GEOSS …

12. SWOT needs a higher profile in international programs to help provide visibility for the mission.