edu.ucar.gdex::d014619 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 2026-04-20T17:51:08Z ISO 19115 Geographic Information - Metadata ISO19115:2003/Cor 1 2006 https://doi.org/10.5065/GYFF-5C40 Improving representation of stratospheric Polar Vortex in Southern Hemisphere with low-frequency frontal waves d014619 2025-09-10 publication Bramberger, Martina author Bacmeister, Julio T. author NSF National Center for Atmospheric Research publisher Many global models tend to produce a stratospheric polar vortex in the Southern Hemisphere winter that is too strong and too cold - a common issue known as the "cold-pole bias". This bias can affect how models simulate important features like the ozone hole. In this study, we use a development version of the Community Atmosphere Model (CAM) at various horizontal resolutions. We find that higher-resolution simulations reduce the cold-pole bias and better capture the structure of the polar vortex. Motivated by this improvement, we introduce a new scheme to represent a source of frontal gravity waves that so far have been missing in the model. Including this new source representation leads to significant improvements in the model's ability to simulate the Southern Hemisphere stratospheric polar vortex, particularly in wind speeds and the vertical structure of the jet stream. 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 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 WINDS > WIND DYNAMICS 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 NSF NCAR Geoscience Data Exchange datahelp@ucar.edu https://gdex.ucar.edu distributor 695573.844 https://gdex.ucar.edu/datasets/d014619/ https Dataset Description Related Link information https://gdex.ucar.edu/datasets/d014619/dataaccess/ https Data Access Related Link download none asNeeded