Thermospheric wind observation and simulation during the Nov 4, 2021 geomagnetic storm event

Thermospheric wind observations from high to mid latitudes are compared with the newly developed Multiscale Atmosphere Geospace Environment (MAGE) model for the Nov 3-4 geomagnetic storm. The observation and simulation comparison shows a very good agreement and is better at high latitudes in general. We were able to identify a thermospheric poleward wind reduction possibly linked to a northward turning of the Interplanetary Magnetic Field (IMF) at ~22 UT on Nov 3 and an enhancement of the poleward wind to a southward turning near 10 UT on Nov 4 at high latitudes. An IMF southward turning may have led to an enhancement of equatorward winds at Boulder, Colorado near midnight. Simultaneous occurrence of aurora may be associated with an IMF By turning negative. The MAGE model wind simulations are consistent with observations in these cases. The results show the model can be a very useful tool to further study the magnetosphere and ionosphere coupling on short time scales.

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Author Wu, Qian
Lin, Dong
Wang, Wenbin
Ward, William
Publisher UCAR/NCAR - Library
Publication Date 2022-09-01T00:00:00
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Topic Category geoscientificInformation
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Metadata Date 2023-08-18T18:25:11.709253
Metadata Record Identifier edu.ucar.opensky::articles:26415
Metadata Language eng; USA
Suggested Citation Wu, Qian, Lin, Dong, Wang, Wenbin, Ward, William. (2022). Thermospheric wind observation and simulation during the Nov 4, 2021 geomagnetic storm event. UCAR/NCAR - Library. http://n2t.net/ark:/85065/d77p93d7. Accessed 02 July 2025.

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