edu.ucar.opensky::articles:26652 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T19:24:39.418187 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7p55sk3 https://doi.org/10.26024/5b58-nc53 https Related Dataset #1 1980-2017 specified dynamics (SD) WACCM-X version v2.1 simulation with nudging of MERRA-2 data https://doi.org/10.5067/IUUF4WB9FT4W https Related Dataset #2 MERRA-2 inst6_3d_ana_Nv: 3d,6-Hourly,Instantaneous,Model-Level,Analysis,Analyzed Meteorological Fields V5.12.4 Polar vortex strength impacts on the longitudinal structure of thermospheric composition and ionospheric electron density 2023-09-01T00:00:00Z publication https://n2t.org/ark:/85065/d7p55sk3 https://doi.org/10.1029/2023JA031797 Greer, K. author Goncharenko, L. author Harvey, V. author Pedatella, Nicholas M. author UCAR/NCAR - Library publisher This work examines the weak stratospheric polar vortex event in late February 2008 and the strong polar vortex event in late February 2021 to understand the potential influence of polar vortex strength on midlatitude thermospheric composition and ionospheric plasma density. The weak polar vortex event shows a reduction in thermospheric O/N2 at all longitudes, changes in the ionospheric total electron content (TEC) that vary with longitude, and an intensification of the semidiurnal tides. The strong polar vortex event shows O/N2 elevated by up to 25% in the Asian sector and a 25% decrease in semidiurnal tidal amplitude. The TEC response during the strong polar vortex event is complex and shows enhanced TEC in the Asian sector where O/N2 is elevated. These are the first observations of anomalies in the thermospheric composition and ionospheric plasma associated with a strong polar vortex event. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation