edu.ucar.gdex::406f5e67-531a-496b-9f6c-14bf10e0852c eng; USA utf8 dataset GDEX Curator UCAR/NCAR - GDEX datahelp@ucar.edu pointOfContact 2022-07-21T11:53:08-06:00 ISO 19115 Geographic information - Metadata ISO 19115:2003(E) https://doi.org/10.5065/jk8v-pn52 A large ensemble of spatially and annually averaged CESM CAM 100-year data 2020-06-11 publication 2020-06-10 modified https://doi.org/10.5065/jk8v-pn52 UCAR/NCAR - GDEX datahelp@ucar.edu publisher Baker, Allison H UCAR/NCAR - Computational and Information Systems Laboratory abaker@ucar.edu author Hammerling, Dorit M Colorado School of Mines hammerling@mines.edu author This repository contains data from an ensemble of 100-year runs on the Cheyenne computer at NCAR. The purpose of this data set is to allow an investigation of how different variables are affected by software and hardware modifications at different time scales. The data was produced by a CESM 1.3 series tag using the CAM5 model version described in Kay et al. (2015). The simulations are CESM startup runs using a present-day F compset (active atmosphere and land, data ocean, and prescribed ice concentration), CAM5 physics at approximately 1 degree latitude/longitude resolution, and the spectral element dynamical core. The output contains CAM data from 147 simulations each with a 100-year time series (100 time points) of 134 variables. Of the 147 runs, 139 are control runs that differ only by an order double precision perturbation to the initial temperature, where 114 were from an Intel compilation and 25 from a GNU compilation. The remaining 8 runs are so-called test runs, each with a single modification (e.g., single parameter, compiler, minor code change) changed relative to the control runs. The simulations originally output monthly data. The modestly sized dataset released here is a result of annually averaging the monthly files, and then spatially averaging the annual averages over the grid. Each of the 147 NetCDF files corresponding to a single simulation contains the variable names and a matrix of 100 years of annual averages for each variable. Allison Baker UCAR/NCAR - Computational and Information Systems Laboratory abaker@ucar.edu pointOfContact Hierarchical Data Format File (application/x-hdf) text/plain Dataset DataCite Resource Type 2014-10-16 revision 3.1 DataCite Metadata Working Group originator resourceTypeGeneral EARTH SCIENCE SERVICES > DATA ANALYSIS AND VISUALIZATION EARTH SCIENCE SERVICES > MODELS > COUPLED CLIMATE MODELS theme NASA/GCMD Earth Science Keywords Science and Services Keywords 2018-03-15 revision 8.6 Global Change Master Directory (GCMD). 2018. GCMD Keywords, Version 8.6. Greenbelt, MD: Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://earthdata.nasa.gov/gcmd-forum Creative Commons Attribution 4.0 International License. None 1.0 1.0 eng; USA -180.0 180.0 -90.0 90.0 Hierarchical Data Format File (application/x-hdf) text/plain UCAR/NCAR - CISL - CDP resourceProvider https://gdex.ucar.edu/dataset/id/406f5e67-531a-496b-9f6c-14bf10e0852c.html https browser A large ensemble of spatially and annually averaged CESM CAM 100-year data Metadata Link download