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Thermospheric winds around the cusp region
dc.contributor.authorSheng, Chengen_US
dc.contributor.authorDeng, Yueen_US
dc.contributor.authorWu, Qianen_US
dc.contributor.authorRidley, Aaronen_US
dc.contributor.authorHäggström, Ingemaren_US
dc.date.accessioned2015-04-02T15:12:26Z
dc.date.available2016-03-02T19:36:55Zen
dc.date.issued2015-02en_US
dc.identifier.citationSheng, Cheng; Deng, Yue; Wu, Qian; Ridley, Aaron; Häggström, Ingemar (2015). "Thermospheric winds around the cusp region." Journal of Geophysical Research: Space Physics 120(2): 1248-1255.en_US
dc.identifier.issn2169-9380en_US
dc.identifier.issn2169-9402en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/110850
dc.description.abstractAn equatorward wind has been observed first by the balloon‐borne Fabry‐Perot interferometer called High‐Altitude Interferometer Wind Observation on the equatorward side of the cusp near the local noon, which is opposite to the typical direction of neutral wind driven by the day‐night pressure gradient. However, this dayside equatorward wind was not reproduced by the standard Thermosphere Ionosphere Electrodynamics General Circulation Model under the resolution of 5° longitude by 5° latitude (5°×5°). In this study, the Global Ionosphere Thermosphere Model has been run in different cases and under different resolutions to investigate the neutral dynamics around the cusp region. First, we compare the simulations with and without additional cusp energy inputs to identify the influence of cusp heating. Both runs have a resolution of 5°×1° (longitude × latitude) in order to better resolve the cusp region. After adding in the cusp energy, the meridional wind in simulation turns to be equatorward on the dayside, which is consistent with the observation. It indicates that strong heating in the cusp region causes changes in the pressure gradient around the cusp and subsequent variations in the neutral winds. The simulations with the same cusp heating specifications are repeated, but with different horizontal resolutions to examine the influence of resolution on the simulation results. The comparisons show that the resolution of 5°×1° can resolve the cusp region much more stably and consistently than the 5°×5° resolution.Key PointsThe observed equatorward winds around the cusp have been reproduced by GITMThe impact of cusp energy on the horizontal neutral winds has been studiedThe influence of resolution on cusp simulation has also been investigateden_US
dc.publisherWiley Periodicals, Inc.en_US
dc.subject.otherGITMen_US
dc.subject.othercuspen_US
dc.subject.othersoft electron precipitationen_US
dc.subject.otherthermospheric windsen_US
dc.subject.otherPoynting fluxen_US
dc.titleThermospheric winds around the cusp regionen_US
dc.typeArticleen_US
dc.rights.robotsIndexNoFollowen_US
dc.subject.hlbsecondlevelAstronomy and Astrophysicsen_US
dc.subject.hlbtoplevelScienceen_US
dc.description.peerreviewedPeer Revieweden_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/110850/1/jgra51569.pdf
dc.identifier.doi10.1002/2014JA020028en_US
dc.identifier.sourceJournal of Geophysical Research: Space Physicsen_US
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dc.owningcollnameInterdisciplinary and Peer-Reviewed


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