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Article: Temporal Variation of Solar Wind in Controlling Solar Wind-Magnetosphere-Ionosphere Energy Budget

TitleTemporal Variation of Solar Wind in Controlling Solar Wind-Magnetosphere-Ionosphere Energy Budget
Authors
Issue Date2018
PublisherAmerican Geophysical Union. The Journal's web site is located at https://agupubs.onlinelibrary.wiley.com/journal/21562202a
Citation
Journal of Geophysical Research: Space Physics, 2018, v. 123, p. 5862-5869 How to Cite?
AbstractPeriodic oscillations associated with Alfven waves with periods ranging from several tens of minutes to several hours are commonly seen in the solar wind. It is not yet known how the solar wind oscillation frequency, and thus its temporal variation, regulates the energy flow through the coupled solar wind‐magnetosphere‐ionosphere‐thermosphere system. Utilizing the Coupled Magnetosphere‐Ionosphere‐Thermosphere Model driven by solar wind and interplanetary magnetic field (IMF), we have analyzed the magnetosphere‐ionosphere‐thermosphere system response to IMF Bz oscillations with periods of 10, 30, and 60 min from the perspective of energy budget. Our results indicate that the energy flow from the solar wind to geospace depends on the IMF Bz oscillation frequency. The energy coupling efficiency, defined as the ratio of the globally integrated joule heating to Akasofu's Epsilon function, is higher for lower frequency IMF Bz oscillations. Joule heating in the upper atmosphere depends not only on directly driven processes due to solar wind variability but also on the intrinsic dynamics of the magnetosphere (i.e., loading‐unloading process). This work highlights the critical role of solar wind and IMF temporal variation and the inductive inertia and resistance of coupled magnetosphere‐ionosphere system in controlling the energy transfer in the coupled solar wind‐geospace system, which has not been explored before.
Persistent Identifierhttp://hdl.handle.net/10722/261116
ISSN
2019 Impact Factor: 2.799
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLiu, J-
dc.contributor.authorWang, W-
dc.contributor.authorZhang, B-
dc.contributor.authorHuang, C-
dc.contributor.authorDong, L-
dc.date.accessioned2018-09-14T08:52:46Z-
dc.date.available2018-09-14T08:52:46Z-
dc.date.issued2018-
dc.identifier.citationJournal of Geophysical Research: Space Physics, 2018, v. 123, p. 5862-5869-
dc.identifier.issn2169-9380-
dc.identifier.urihttp://hdl.handle.net/10722/261116-
dc.description.abstractPeriodic oscillations associated with Alfven waves with periods ranging from several tens of minutes to several hours are commonly seen in the solar wind. It is not yet known how the solar wind oscillation frequency, and thus its temporal variation, regulates the energy flow through the coupled solar wind‐magnetosphere‐ionosphere‐thermosphere system. Utilizing the Coupled Magnetosphere‐Ionosphere‐Thermosphere Model driven by solar wind and interplanetary magnetic field (IMF), we have analyzed the magnetosphere‐ionosphere‐thermosphere system response to IMF Bz oscillations with periods of 10, 30, and 60 min from the perspective of energy budget. Our results indicate that the energy flow from the solar wind to geospace depends on the IMF Bz oscillation frequency. The energy coupling efficiency, defined as the ratio of the globally integrated joule heating to Akasofu's Epsilon function, is higher for lower frequency IMF Bz oscillations. Joule heating in the upper atmosphere depends not only on directly driven processes due to solar wind variability but also on the intrinsic dynamics of the magnetosphere (i.e., loading‐unloading process). This work highlights the critical role of solar wind and IMF temporal variation and the inductive inertia and resistance of coupled magnetosphere‐ionosphere system in controlling the energy transfer in the coupled solar wind‐geospace system, which has not been explored before.-
dc.languageeng-
dc.publisherAmerican Geophysical Union. The Journal's web site is located at https://agupubs.onlinelibrary.wiley.com/journal/21562202a-
dc.relation.ispartofJournal of Geophysical Research: Space Physics-
dc.rightsJournal of Geophysical Research: Space Physics. Copyright © American Geophysical Union.-
dc.rightsPublished version An edited version of this paper was published by AGU. Copyright (year) American Geophysical Union.-
dc.titleTemporal Variation of Solar Wind in Controlling Solar Wind-Magnetosphere-Ionosphere Energy Budget-
dc.typeArticle-
dc.identifier.emailZhang, B: binzh@hku.hk-
dc.identifier.authorityZhang, B=rp02366-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1029/2017JA025154-
dc.identifier.scopuseid_2-s2.0-85050503425-
dc.identifier.hkuros290270-
dc.identifier.volume123-
dc.identifier.spage5862-
dc.identifier.epage5869-
dc.identifier.isiWOS:000442664300042-
dc.publisher.placeUnited States-

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