View in EDS

Martian Topside Ionosphere Coupling With the Thermosphere Revealed From Ionospheric and Thermospheric Longitudinal Structures Observed by MAVEN.

Saved in:
Bibliographic Details
Title: Martian Topside Ionosphere Coupling With the Thermosphere Revealed From Ionospheric and Thermospheric Longitudinal Structures Observed by MAVEN.
Authors: Chen, Yiding1,2,3 (AUTHOR) chenyd@mail.iggcas.ac.cn, Liu, Libo1,2,3 (AUTHOR), Le, Huijun1,2,3 (AUTHOR), Zhang, Ruilong1,2,3 (AUTHOR)
Source: Journal of Geophysical Research. Space Physics. May2026, Vol. 131 Issue 5, p1-15. 15p.
Subject Terms: *Ionosphere, Thermosphere, Magnetic fields, Plasma diffusion, Ionospheric disturbances
Abstract: Martian ionosphere‐thermosphere (I‐T) coupling plays important roles in ionospheric variability. Although it has been examined in some literatures, coupling characteristics and mechanisms at different altitudes and the competition between the thermosphere and crustal magnetic fields for dominating ionospheric variations remain to be fully understood. In this study, these topics were discussed by investigating concurrent ionospheric and thermospheric longitudinal variations using MAVEN's measurements. The thermosphere can dominate ionospheric longitudinal variations directly or indirectly in the altitudinal range up to 300 km under weak crustal field conditions. Neutral density is the decisive factor for longitudinal variations of the topside electron density, whereas neutral scale height is decisive for those of the peak electron density. Longitudinal structures in electron and neutral densities remain in‐phase in the topside ionosphere, while they are anti‐phase below the electron density peak. These characteristics are consistent with in situ photochemical I‐T coupling. The region where the in situ coupling dominates can extend to altitudes above 200 km. Ionospheric longitudinal structures generated in this region can further extend to higher altitudes and amplify with increasing altitudes through upward plasma diffusion. The photochemical I‐T coupling can still dominate ionospheric longitudinal variations below ∼210 km under strong crustal field conditions. Crustal field effect gradually dominates over thermospheric effect as altitude increases. It causes a steady ionospheric structure relative to crustal field distribution, and that structure enhances with increasing altitudes. This study enhances our understanding of Martian I‐T coupling at different altitudes and its role in ionospheric variability. Key Points: I‐T coupling combined with plasma diffusion may dominate ionospheric longitudinal variation up to 300 km altitudes under weak crustal fieldsRelationship between ionospheric and thermospheric longitudinal variation phases reverses near the ionospheric main peak under I‐T couplingEffect of strong crustal magnetic fields on ionospheric longitudinal variation gradually dominates over that of I‐T coupling above ∼200 km [ABSTRACT FROM AUTHOR]
Copyright of Journal of Geophysical Research. Space Physics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: GreenFILE
FullText Text:
  Availability: 0
Header DbId: 8gh
DbLabel: GreenFILE
An: 194052495
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Martian Topside Ionosphere Coupling With the Thermosphere Revealed From Ionospheric and Thermospheric Longitudinal Structures Observed by MAVEN.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Chen%2C+Yiding%22">Chen, Yiding</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> chenyd@mail.iggcas.ac.cn</i><br /><searchLink fieldCode="AR" term="%22Liu%2C+Libo%22">Liu, Libo</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Le%2C+Huijun%22">Le, Huijun</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Ruilong%22">Zhang, Ruilong</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Journal+of+Geophysical+Research%2E+Space+Physics%22">Journal of Geophysical Research. Space Physics</searchLink>. May2026, Vol. 131 Issue 5, p1-15. 15p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Ionosphere%22">Ionosphere</searchLink><br /><searchLink fieldCode="DE" term="%22Thermosphere%22">Thermosphere</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+fields%22">Magnetic fields</searchLink><br /><searchLink fieldCode="DE" term="%22Plasma+diffusion%22">Plasma diffusion</searchLink><br /><searchLink fieldCode="DE" term="%22Ionospheric+disturbances%22">Ionospheric disturbances</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Martian ionosphere‐thermosphere (I‐T) coupling plays important roles in ionospheric variability. Although it has been examined in some literatures, coupling characteristics and mechanisms at different altitudes and the competition between the thermosphere and crustal magnetic fields for dominating ionospheric variations remain to be fully understood. In this study, these topics were discussed by investigating concurrent ionospheric and thermospheric longitudinal variations using MAVEN's measurements. The thermosphere can dominate ionospheric longitudinal variations directly or indirectly in the altitudinal range up to 300 km under weak crustal field conditions. Neutral density is the decisive factor for longitudinal variations of the topside electron density, whereas neutral scale height is decisive for those of the peak electron density. Longitudinal structures in electron and neutral densities remain in‐phase in the topside ionosphere, while they are anti‐phase below the electron density peak. These characteristics are consistent with in situ photochemical I‐T coupling. The region where the in situ coupling dominates can extend to altitudes above 200 km. Ionospheric longitudinal structures generated in this region can further extend to higher altitudes and amplify with increasing altitudes through upward plasma diffusion. The photochemical I‐T coupling can still dominate ionospheric longitudinal variations below ∼210 km under strong crustal field conditions. Crustal field effect gradually dominates over thermospheric effect as altitude increases. It causes a steady ionospheric structure relative to crustal field distribution, and that structure enhances with increasing altitudes. This study enhances our understanding of Martian I‐T coupling at different altitudes and its role in ionospheric variability. Key Points: I‐T coupling combined with plasma diffusion may dominate ionospheric longitudinal variation up to 300 km altitudes under weak crustal fieldsRelationship between ionospheric and thermospheric longitudinal variation phases reverses near the ionospheric main peak under I‐T couplingEffect of strong crustal magnetic fields on ionospheric longitudinal variation gradually dominates over that of I‐T coupling above ∼200 km [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Geophysical Research. Space Physics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=8gh&AN=194052495
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1029/2026JA035043
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 15
        StartPage: 1
    Subjects:
      – SubjectFull: Ionosphere
        Type: general
      – SubjectFull: Thermosphere
        Type: general
      – SubjectFull: Magnetic fields
        Type: general
      – SubjectFull: Plasma diffusion
        Type: general
      – SubjectFull: Ionospheric disturbances
        Type: general
    Titles:
      – TitleFull: Martian Topside Ionosphere Coupling With the Thermosphere Revealed From Ionospheric and Thermospheric Longitudinal Structures Observed by MAVEN.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Chen, Yiding
      – PersonEntity:
          Name:
            NameFull: Liu, Libo
      – PersonEntity:
          Name:
            NameFull: Le, Huijun
      – PersonEntity:
          Name:
            NameFull: Zhang, Ruilong
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 21699380
          Numbering:
            – Type: volume
              Value: 131
            – Type: issue
              Value: 5
          Titles:
            – TitleFull: Journal of Geophysical Research. Space Physics
              Type: main
ResultId 1