edu.ucar.gdex::d651002 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 2026-04-22T18:26:13Z ISO 19115 Geographic Information - Metadata ISO19115:2003/Cor 1 2006 https://doi.org/10.5065/S125-CA92 https://www.cesm.ucar.edu/working-groups/climate/simulations/cesm2-83level https Related Resource #1 CVCWG website with simulation details CESM2 83-level simulations d651002 2024-06-03 publication Simpson, Isla R. author Rosenbloom, Nan A. author NSF National Center for Atmospheric Research publisher In the next generation of the Community Atmosphere Model (CAM7), the model top will be raised and the vertical resolution will be increased. The model top will be approximately 80 km (compared to 40 km in older generations), and the grid spacing in the free troposphere and lower stratosphere will be reduced to about 500 m compared to around 1137m in older generations. In addition to this, extra levels will be added to the boundary layer and the lowest model level will be lowered. Overall, this "mid-top" version of CAM7 will have 93 levels. However, many other changes will also be present in CAM7 such as physics updates and the new spectral element dynamical core, making it challenging to identify the role of this enhanced resolution in changes between CAM7 and CAM6. This dataset consists of a suite of simulations that use CAM6 physics and the finite volume dynamical core, but with CAM7's grid except for the changes to the levels in the boundary layer i.e., an 83 level model. The boundary layer levels are not changed because once those are changed, some additional tuning of the physical parameterizations is needed precluding a clean comparison and identification of the impact of vertical resolution. Only minimal changes to CAM6 physics have been applied to these simulations; the non-orographic gravity wave drag scheme was turned on, the upper boundary condition was changed such that any remaining gravity wave momentum flux is deposited at the model lid, and some minor tuning of the gravity wave drag settings was also performed to optimize the behavior of the QBO. These simulations can, therefore, be compared with existing CAM6 simulations to identify the impacts of this raising of the model lid and change to the resolution of the free troposphere and lower stratosphere. These simulations have an internally generated QBO and a relatively good representation of the stratospheric polar vortices and can be used to explore climate variability and change in the presence of those features. completed datahelp@ucar.edu pointOfContact notPlanned dataset https://gdex.ucar.edu/images/ds_logos/default_200_200.png Logo thumbnail from URL png HDF5/NetCDF4 dataset Resource Type 2021-03-30 revision 4.4 DataCite Metadata Working Group orginator resourceTypeGeneral CESM > NCAR Community Earth System Model MODELS > MODELS 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 > SURFACE TEMPERATURE 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 > ATMOSPHERIC WINDS > WIND DYNAMICS > VERTICAL WIND VELOCITY/SPEED EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > LIQUID PRECIPITATION > RAIN 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 1850-01 2100-12 NSF NCAR Geoscience Data Exchange datahelp@ucar.edu https://gdex.ucar.edu distributor 166568482.589 https://gdex.ucar.edu/datasets/d651002/ https Dataset Description Related Link information https://gdex.ucar.edu/datasets/d651002/dataaccess/ https Data Access Related Link download none asNeeded