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Enabling the Transition of CPC Products to GIS Format

Enabling the Transition of CPC Products to GIS Format. Brian Doty Jennifer Adams Michael Halpert Viviane Silva. Strategy. Enhance the GrADS software package to: Output GIS formats Improve analysis and data management for multi-ensemble multi-model data sets

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Enabling the Transition of CPC Products to GIS Format

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  1. Enabling the Transition of CPC Products to GIS Format Brian Doty Jennifer Adams Michael Halpert Viviane Silva

  2. Strategy • Enhance the GrADS software package to: • Output GIS formats • Improve analysis and data management for multi-ensemble multi-model data sets • CPC delivers products via the ArcGIS server

  3. The Grid Analysis and Display System (GrADS) • Integrated environment for data access, analysis, and display • Automation and batch processing • Open source; active open source community • Handles many data formats: binary, netCDF, HDF, GRIB1, GRIB2, BUFR • Distributed data via GDS and openDAP (GDS: GrADS Data Server)

  4. GIS Data Formats • Shapefile • Vector format • Enhance the GrADS graphics package to produce vector data compliant with Shapefile standards • Attribute database (metadata) • Use metadata already internal to GrADS where possible; provide interface to provide additional metadata • GeoTIFF • Raster format • Produce analytic grid products with GrADS and output directly to GeoTIFF format

  5. GrADS, Ensembles, Multi-model • Biggest design issue: How to handle time • Examples follow

  6. Ensemble Forecast Time Seriesat a fixed location Forecast Time --->

  7. Ensemble Forecast Grid at a fixed location Ensemble Member Forecast Time --->

  8. Two Ensemble Forecastsat a fixed location Ensemble Member Forecast Time --->

  9. Ten Ensemble Forecastsat a fixed location Ensemble Member Forecast Time --->

  10. 33 Ensemble Forecastsat a fixed location Ensemble Member Forecast Time --->

  11. Examples of Ensemble Data Sets • NCEP GFS Ensembles (GENS) • NCEP Short Range Ensemble Forecasts (SREF) • NCEP Climate Forecast System (CFS) • ESRL MRF Re-Forecasting Experiment • WCRP CMIP3 Multi-Model Data (IPCC AR4) • ENSEMBLES • THORPEX Interactive Grand Global Ensemble (TIGGE)

  12. Ensemble Data Sets Behind GDS 2.0 • Data become more usable and accessible • Subsets over all dimensions • Server-side analysis • File aggregation and format translation • Metadata standards:

  13. Ensemble Forecast Time Seriesat a fixed location Forecast Time --->

  14. Ensemble Forecast Time Seriesat a fixed location Forecast Time --->

  15. TIGGE Multi-Member Multi-Model Ensemble500mb Geopotential Height valid August 30, 2008 7-day Lead 5-day Lead 3-day Lead 1-day Lead

  16. TIGGE MME Forecast Error andEnsemble Spread 500mb Geopotential Height valid August 30, 2008 7-day Lead 5-day Lead 3-day Lead 1-day Lead

  17. TIGGE Multi-Member Multi-Model Ensemble500mb Geopotential Height valid August 30, 2008 7-day Lead 5-day Lead 3-day Lead 1-day Lead

  18. TIGGE MME Forecast Error andEnsemble Spread 500mb Geopotential Height valid August 30, 2008 7-day Lead 5-day Lead 3-day Lead 1-day Lead

  19. The End

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