edu.ucar.opensky::articles:18707 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T02:44:32.917843 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7959k6s Effects of magnetospheric lobe cell convection on dayside upper thermospheric winds at high latitudes 2016-08-26T00:00:00Z publication https://n2t.org/ark:/85065/d7959k6s https://doi.org/10.1002/2016GL069834 Zhang, Binzheng author Wang, Wenbin author Wu, Qian author Knipp, Delores J. author Kilcommons, L. author Brambles, O. J. author Liu, Jiajia author Wiltberger, Michael author Lyon, J. G. author Häggström, I. author UCAR/NCAR - Library publisher This paper investigates a possible physical mechanism of the observed dayside high-latitude upper thermospheric wind using numerical simulations from the coupled magnetosphere-ionosphere-thermosphere (CMIT) model. Results show that the CMIT model is capable of reproducing the unexpected afternoon equatorward winds in the upper thermosphere observed by the High altitude Interferometer WIND observation (HIWIND) balloon. Models that lack adequate coupling produce poleward winds. The modeling study suggests that ion drag driven by magnetospheric lobe cell convection is another possible mechanism for turning the climatologically expected dayside poleward winds to the observed equatorward direction. The simulation results are validated by HIWIND, European Incoherent Scatter, and Defense Meteorological Satellite Program. The results suggest a strong momentum coupling between high-latitude ionospheric plasma circulation and thermospheric neutral winds in the summer hemisphere during positive IMF B-z periods, through the formation of magnetospheric lobe cell convection driven by persistent positive IMF B-y. The CMIT simulation adds important insight into the role of dayside coupling during intervals of otherwise quiet geomagnetic activity 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 2016 American Geophysical Union. None eng geoscientificInformation