edu.ucar.gdex::d583122 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 2026-04-22T17:53:39Z ISO 19115 Geographic Information - Metadata ISO19115:2003/Cor 1 2006 https://doi.org/10.5065/w3x2-fz18 Climate Change in the Thermosphere and Ionosphere from the Early Twentieth Century to Early Twenty-First Century Simulated by the Whole Atmosphere Community Climate Model - eXtended d583122 2023-11-02 publication McInerney, Joseph M. author NSF National Center for Atmospheric Research publisher Motivated by numerous lower atmosphere climate model hindcast simulations, we performed simulations of the earth's atmosphere from the surface up through the thermosphere-ionosphere to reveal for the first time the century scale changes in the upper atmosphere from the 1920s through the 2010s using the Whole Atmosphere Community Climate Model - eXtended (WACCM-X v. 2.1). We impose solar minimum conditions to get a clear indication of the effects of the long-term forcing from greenhouse gas increases and changes of the Earth's magnetic field and to avoid the requirement for careful removal of the 11-year solar cycle as in some previous studies using observations and models. These previous studies have shown greenhouse gas effects in the upper atmosphere but what has been missing is the time evolution with actual greenhouse gas increases throughout the last century, including the period of less than 5% increase prior to the space age and the transition to the over 25% increase in the latter half of the 20th century. Neutral temperature, density, and ionosphere changes are close to those reported in previous studies, and we find a high correlation of continuous changes over this past century between carbon dioxide and thermosphere neutral temperature due the shorter adjustment time of the upper atmosphere to greenhouse gas changes relative to the years to decades in the lower atmosphere. Consequently, WACCM-X future projections can provide valuable insight into what is to come in the entire atmosphere under future scenarios of greenhouse gas changes and mitigation efforts. The model output covers the first 6 years of each decade from the 1920s to the 2010s. The horizontal resolution is 1.9 x 2.5 latitude x longitude and 1/4 scale height in the vertical. 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 CLIMATE MODELS > CLIMATE 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 > CLIMATE INDICATORS > SUN-EARTH INTERACTIONS > SUNSPOT ACTIVITY EARTH SCIENCE > HUMAN DIMENSIONS > ENVIRONMENTAL IMPACTS > GREENHOUSE GASES 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 1920-01 2015-12 NSF NCAR Geoscience Data Exchange datahelp@ucar.edu https://gdex.ucar.edu distributor 896756.023 https://gdex.ucar.edu/datasets/d583122/ https Dataset Description Related Link information https://gdex.ucar.edu/datasets/d583122/dataaccess/ https Data Access Related Link download none asNeeded