1. A41I-0105 Supporting Decadal and Regional Climate Prediction through NCAR’s EaSM Data Portal Doug Schuster and Steve Worley National Center for Atmospheric Research, Computational and Information Systems Laboratory, Boulder, CO http://rda.ucar.edu/datasets/ds316.0/ schuster@ucar.edu Introduction Following expert guidance from National Center for Atmospheric Research (NCAR) scientists, a selection of Coupled Model Intercomparison Project Phase 5 (CMIP-5) global model output has been identified and published through the NCAR Research Data Archive (RDA) to support National Science Foundation (NSF) Earth System Models (EaSM) projects and similar research. Major lines of supported research include decadal and regional climate change studies that require high temporal resolution data for initialization of regional climate prediction models, and downscaling activities. Presently, the scalable data system offers access to the 3-D global atmospheric, six-hourly, Community Earth System Model (CESM) output parameters (specific humidity, temperature, wind components, and geopotential height on 26 hybrid model levels) from the 20 th Century run (1950-2005) and four concomitant Representative Concentration Pathway (RCP) future scenarios spanning 2005-2100. Additionally, select parameters on pressure and surface levels (temperature, pressure, wind components, and precipitation rate) are provided to support analysis studies and serve as surface boundary conditions. Multiple options are available for users to access the EaSM data archive. The RDA-EaSM data sub-setting portal supports user selection of temporal range, spatial area, and parameters from the global model data that can be used to define boundary conditions suitable for regional modeling studies. Archive files can also be accessed in yearly timeseries-parameter, or monthly synoptic time structure through the RDA filelist interface. NCAR EaSM Model Data Holdings User Support Services The RDA consulting team consists of specialists with science and engineering educational backgrounds, and applied experience in research. Each consultant focuses on a specific range of datasets and provides direct user support for those datasets, including the EaSM dataset (Doug Schuster, schuster@ucar.edu). Examples of this support includes preparation of one-off user requests, assistance with supporting software, data quality and format questions, and help in getting data transferred to the end user through the most convenient method, including hard media. To inform users of new services and updates, the RDA publishes updates through a news page on its web interface, an RSS feed, a Twitter feed (NCAR_RDA), and a Facebook page (NCAR-CISL-Research-Data-Archive). For general help, please contact dssweb@ucar.edu or see http://rda.ucar.edu/#FAQs Model SimulationCoverage (yr) 20 th Century Simulation1950-2005 RCP2.6 Simulation2005-2100 RCP4.5 Simulation2005-2100 RCP6.0 Simulation2005-2100 RCP8.5 Simulation2005-2100 Data Access Workflows ParametersLevels Temperature 26 Model Hybrid Levels Specific Humidity26 Model Hybrid Levels Zonal Wind26 Model Hybrid Levels Meridional Wind26 Model Hybrid Levels Geopotential Height26 Model Hybrid Levels Convective Precipitation RateSingle Level Large Scale Precipitation RateSingle Level Surface PressureSingle Level Sea Level PressureSingle Level Surface TemperatureSingle Level Lowest Model Level Zonal WindSingle Level Lowest Model Level Meridional WindSingle Level 850 mb Zonal WindSingle Level 850 mb Meridional WindSingle Level 500 mb TemperatureSingle Level 200 mb TemperatureSingle Level 200 mb Geopotential HeightSingle Level 100 mb Geopotential HeightSingle Level Temporal Range, Parameter, and Spatial Area Data Sub-sets Time Series Parameter or Monthly Synoptic Time Structured Data Files