edu.ucar.gdex::d651076 eng; USA utf-8 dataset NSF NCAR Geoscience Data Exchange datahelp@ucar.edu https://gdex.ucar.edu NSF NCAR Geoscience Data Exchange The Geoscience Data Exchange (GDEX), managed by the Computational and Information Systems Laboratory (CISL) at NSF NCAR, contains a large collection of meteorological, atmospheric composition, and oceanographic observations, and operational and reanalysis model outputs, integrated with NSF NCAR High Performance Compute services to support atmospheric and geosciences research. download pointOfContact 2026-04-21T03:06:17Z ISO 19115 Geographic Information - Metadata ISO19115:2003/Cor 1 2006 https://doi.org/10.26024/bzne-yf09 CESM2.2 CAM6 PPE d651076 2022-01-01 publication Eidhammer, Trude author Gettelman, Andrew author Thayer-Calder, Katherine author NSF National Center for Atmospheric Research publisher To evaluate parameterizations in models, simulations have often been performed with only one change to one parameterization at a time. This is not efficient and can be both time-consuming and computationally expensive. This data represents a Perturbed Parameter Ensemble (PPE) technique, where multiple parameters are varied simultaneously and the parameter values are determined with Latin Hypercube sampling. Then an emulator is developed in the multi-dimensional space mapping input parameters to output metrics. We apply the PPE method to CESM2 CAM6 to understand climate sensitivity to atmospheric physics parameters. The initial simulations vary 44 parameters in the microphysics, convective, turbulence and aerosol schemes with 250 ensembles. This will be extended. These atmospheric parameters are typically the most uncertain in many climate models. We analyze control simulations, and targeted simulations to understand climate forcing due to aerosols, and fast climate feedbacks. The PPE is applicable to other configurations to address questions of other model processes in the atmosphere and other model components (e.g. coupling to the land surface). completed datahelp@ucar.edu pointOfContact notPlanned dataset https://gdex.ucar.edu/images/ds_logos/default_200_200.png Logo thumbnail from URL png NetCDF dataset Resource Type 2021-03-30 revision 4.4 DataCite Metadata Working Group orginator resourceTypeGeneral CESM > NCAR Community Earth System Model U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2026-04-15 revision 23.7 NASA Global Change Master Directory orginator Valids List: Platforms EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > SEA LEVEL PRESSURE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > UPPER AIR TEMPERATURE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR INDICATORS > HUMIDITY > SPECIFIC HUMIDITY EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS > U/V WIND COMPONENTS EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > PRECIPITATION PROFILES > LATENT HEAT FLUX U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2026-04-15 revision 23.7 NASA Global Change Master Directory orginator Valids List: Science and Services Keywords Creative Commons Attribution 4.0 International License None eng utf-8 climatologyMeteorologyAtmosphere 0001-01 0001-12 NSF NCAR Geoscience Data Exchange datahelp@ucar.edu https://gdex.ucar.edu distributor 46641909.018 https://gdex.ucar.edu/datasets/d651076/ https Dataset Description Related Link information https://gdex.ucar.edu/datasets/d651076/dataaccess/ https Data Access Related Link download none asNeeded