dc.date.accessioned | 2021-03-15T20:53:26Z | |
dc.date.available | 2021-05-21T22:45:53Z | |
dc.date.created | 2021-01-05T18:00:21Z | |
dc.date.issued | 2020 | |
dc.identifier.citation | Ivarsen, Magnus Fagernes Park, Jaeheung Kwak, Young-Sil Jin, Yaqi Knudsen, D. J. Clausen, Lasse Boy Novock . Observational Evidence for the Role of Hall Conductance in Alfvén Wave Reflection. Journal of Geophysical Research (JGR): Space Physics. 2020, 125(12) | |
dc.identifier.uri | http://hdl.handle.net/10852/84105 | |
dc.description.abstract | Electromagnetic energy carried by magnetohydrodynamic modes is an important mechanism in the energy transfer between the magnetosphere and the ionosphere. Alfvén waves are known to carry field‐aligned currents and thus play an important role in the dynamics of the ionosphere‐magnetosphere coupling. The role of Hall conductance in this interplay has been explored in magnetohydrodynamic models of the ionosphere but has hitherto not been observed in situ. We use 5 years of observations from the Swarm mission to shed light on this interplay. We present a high‐latitude climatology of both the measured Poynting flux and the measured Alfvén wave reflection coefficient. Our results indicate that high‐energy precipitation, which penetrates deep into the ionosphere and directly leads to strongly enhanced Hall conductance, is an important cause of positively interfering Alfvén wave reflection. We present such observational evidence and, with that, suggest that Hall conductance is substantially more important in the ionospheric wave reflection climatology than hitherto believed. | |
dc.language | EN | |
dc.title | Observational Evidence for the Role of Hall Conductance in Alfvén Wave Reflection | |
dc.type | Journal article | |
dc.creator.author | Ivarsen, Magnus Fagernes | |
dc.creator.author | Park, Jaeheung | |
dc.creator.author | Kwak, Young-Sil | |
dc.creator.author | Jin, Yaqi | |
dc.creator.author | Knudsen, D. J. | |
dc.creator.author | Clausen, Lasse Boy Novock | |
cristin.unitcode | 185,15,4,0 | |
cristin.unitname | Fysisk institutt | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.fulltext | postprint | |
cristin.qualitycode | 2 | |
dc.identifier.cristin | 1865948 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of Geophysical Research (JGR): Space Physics&rft.volume=125&rft.spage=&rft.date=2020 | |
dc.identifier.jtitle | Journal of Geophysical Research (JGR): Space Physics | |
dc.identifier.volume | 125 | |
dc.identifier.issue | 12 | |
dc.identifier.pagecount | 0 | |
dc.identifier.doi | https://doi.org/10.1029/2020JA028119 | |
dc.identifier.urn | URN:NBN:no-86800 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 2169-9380 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/84105/1/2020JA028119.pdf | |
dc.type.version | PublishedVersion | |