File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Propagating and Dynamic Properties of Magnetic Dips in the Dayside Magnetosheath: MMS Observations

TitlePropagating and Dynamic Properties of Magnetic Dips in the Dayside Magnetosheath: MMS Observations
Authors
Keywordsmagnetic dip
magnetopause
mirror mode
pressure balance
propagation
slow mode
Issue Date2020
Citation
Journal of Geophysical Research: Space Physics, 2020, v. 125, n. 6, article no. e2019JA026736 How to Cite?
AbstractThe magnetosheath is inherently complex and rich, exhibiting various kinds of structures and perturbations. It is important to understand how these structures propagate and evolve and how they relate to the perturbations. Here we investigate a kind of magnetosheath structure known as a magnetic dip (MD). As far as we are aware, there have been no previous studies concerning the evolution (contracting or expanding) of these types of structures, and their propagation properties cannot be unambiguously determined. In this study, using Magnetospheric MultiScale (MMS) high-temporal resolution data and multispacecraft analysis methods, we obtain the propagation and dynamic features of a set of MDs. Four different types of MDs are identified: “frozen-in,” “expanding,” “contracting,” and “stable-propagating.” Significantly, a stable-propagation event is observed with a sunward propagation component. This indicates that the source of the structure in this case is closely associated with the magnetopause, which provides strong support to the contention in earlier research. We further reveal the mechanism leading to the MD contraction or expansion. The motion of the MDs boundary is found closely related with the dynamic pressure. The scale of the contracting and expanding events are typically ~5–20 ρi (ion gyroradius), significantly smaller than that of frozen-in events (~40 ρi). The observations could relate large-scale (more than several tens of ρi) and kinetic-scale (less than ρi) MDs, by revealing an evolution that spans these different scales, and help us better understand the variation and dynamics of magnetosheath structures and plasmas.
Persistent Identifierhttp://hdl.handle.net/10722/334665
ISSN
2023 Impact Factor: 2.6
2023 SCImago Journal Rankings: 0.845
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYao, S. T.-
dc.contributor.authorHamrin, M.-
dc.contributor.authorShi, Q. Q.-
dc.contributor.authorYao, Z. H.-
dc.contributor.authorDegeling, A. W.-
dc.contributor.authorZong, Q. G.-
dc.contributor.authorLiu, H.-
dc.contributor.authorTian, A. M.-
dc.contributor.authorLiu, J.-
dc.contributor.authorHu, H. Q.-
dc.contributor.authorLi, B.-
dc.contributor.authorBai, S. C.-
dc.contributor.authorRussell, C. T.-
dc.contributor.authorGiles, B. L.-
dc.date.accessioned2023-10-20T06:49:46Z-
dc.date.available2023-10-20T06:49:46Z-
dc.date.issued2020-
dc.identifier.citationJournal of Geophysical Research: Space Physics, 2020, v. 125, n. 6, article no. e2019JA026736-
dc.identifier.issn2169-9380-
dc.identifier.urihttp://hdl.handle.net/10722/334665-
dc.description.abstractThe magnetosheath is inherently complex and rich, exhibiting various kinds of structures and perturbations. It is important to understand how these structures propagate and evolve and how they relate to the perturbations. Here we investigate a kind of magnetosheath structure known as a magnetic dip (MD). As far as we are aware, there have been no previous studies concerning the evolution (contracting or expanding) of these types of structures, and their propagation properties cannot be unambiguously determined. In this study, using Magnetospheric MultiScale (MMS) high-temporal resolution data and multispacecraft analysis methods, we obtain the propagation and dynamic features of a set of MDs. Four different types of MDs are identified: “frozen-in,” “expanding,” “contracting,” and “stable-propagating.” Significantly, a stable-propagation event is observed with a sunward propagation component. This indicates that the source of the structure in this case is closely associated with the magnetopause, which provides strong support to the contention in earlier research. We further reveal the mechanism leading to the MD contraction or expansion. The motion of the MDs boundary is found closely related with the dynamic pressure. The scale of the contracting and expanding events are typically ~5–20 ρi (ion gyroradius), significantly smaller than that of frozen-in events (~40 ρi). The observations could relate large-scale (more than several tens of ρi) and kinetic-scale (less than ρi) MDs, by revealing an evolution that spans these different scales, and help us better understand the variation and dynamics of magnetosheath structures and plasmas.-
dc.languageeng-
dc.relation.ispartofJournal of Geophysical Research: Space Physics-
dc.subjectmagnetic dip-
dc.subjectmagnetopause-
dc.subjectmirror mode-
dc.subjectpressure balance-
dc.subjectpropagation-
dc.subjectslow mode-
dc.titlePropagating and Dynamic Properties of Magnetic Dips in the Dayside Magnetosheath: MMS Observations-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1029/2019JA026736-
dc.identifier.scopuseid_2-s2.0-85087043458-
dc.identifier.volume125-
dc.identifier.issue6-
dc.identifier.spagearticle no. e2019JA026736-
dc.identifier.epagearticle no. e2019JA026736-
dc.identifier.eissn2169-9402-
dc.identifier.isiWOS:000545696000025-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats