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 Series at a fixed location Forecast Time --->

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

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

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

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

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 Series at a fixed location Forecast Time --->

14. Ensemble Forecast Time Series at a fixed location Forecast Time --->

15. TIGGE Multi-Member Multi-Model Ensemble 500mb Geopotential Height valid August 30, 2008 7-day Lead 3-day Lead 5-day Lead 1-day Lead

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

17. TIGGE Multi-Member Multi-Model Ensemble 500mb Geopotential Height valid August 30, 2008 7-day Lead 3-day Lead 5-day Lead 1-day Lead

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

20. The End