View in EDS

Spatial Distribution and Wave Property of Dual‐Frequency EMIC Waves: Swarm Observations.

Saved in:
Bibliographic Details
Title: Spatial Distribution and Wave Property of Dual‐Frequency EMIC Waves: Swarm Observations.
Authors: Wang, C. Z.1 (AUTHOR), Wang, H.1 (AUTHOR) h.wang@whu.edu.cn, Zhang, K. D.1 (AUTHOR), Zhong, Y. F.1 (AUTHOR), Xia, H.1 (AUTHOR), Sun, Y.1 (AUTHOR), Cheng, Q. H.1 (AUTHOR), Leng, Z. Y.1 (AUTHOR)
Source: Journal of Geophysical Research. Space Physics. Sep2024, Vol. 129 Issue 9, p1-17. 17p.
Subject Terms: *Magnetic storms, *Ionosphere, Magnetic fields, Power density, Sunrise & sunset
Abstract: The spatial distributions of single‐frequency and dual‐frequency Electromagnetic ion cyclotron (EMIC) waves in the subauroral ionosphere are investigated under varying geomagnetic activities, using high‐resolution magnetic field data from dual Swarm satellites spanning from 2015 to 2017. Single‐frequency EMIC waves predominantly occur in the dawn sector, whereas dual‐frequency waves exhibit peaks around both dawn and dusk. The occurrence rate of dual‐frequency waves shows a more pronounced increase with increasing geomagnetic activity. As magnetic storms evolve, both types of EMIC waves shift from dusk to dawn. The South Atlantic Anomaly (SAA) emerges as a high‐incidence region for ionospheric EMIC waves. Dual‐frequency EMIC waves display lower frequencies compared to other regions. Additionally, the low‐frequency components of dual‐frequency waves observed at higher latitudes demonstrate greater power density and longer durations than their high‐frequency counterparts. This suggests that higher frequency waves experience more significant damping during propagation. Most dual‐frequency EMIC waves observed in the ionosphere belong to the O‐band and He‐band waves, indicating that magnetospheric bands below the cyclotron frequency of H+ are more likely to propagate into the ionosphere. Key Points: Single‐frequency ionospheric electromagnetic ion cyclotron (EMIC) waves mainly occur in the dawn sector while dual‐frequency EMIC waves peak around dawn and duskThe occurrence rate of dual‐frequency waves increases more significantly with enhanced geomagnetic activity than single‐frequency wavesLow‐frequency components of dual‐frequency waves observed at higher latitudes exhibit greater power density and extended duration [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: 179878144
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Spatial Distribution and Wave Property of Dual‐Frequency EMIC Waves: Swarm Observations.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Wang%2C+C%2E+Z%2E%22">Wang, C. Z.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+H%2E%22">Wang, H.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> h.wang@whu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zhang%2C+K%2E+D%2E%22">Zhang, K. D.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhong%2C+Y%2E+F%2E%22">Zhong, Y. F.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xia%2C+H%2E%22">Xia, H.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sun%2C+Y%2E%22">Sun, Y.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cheng%2C+Q%2E+H%2E%22">Cheng, Q. H.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Leng%2C+Z%2E+Y%2E%22">Leng, Z. Y.</searchLink><relatesTo>1</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>. Sep2024, Vol. 129 Issue 9, p1-17. 17p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Magnetic+storms%22">Magnetic storms</searchLink><br />*<searchLink fieldCode="DE" term="%22Ionosphere%22">Ionosphere</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+fields%22">Magnetic fields</searchLink><br /><searchLink fieldCode="DE" term="%22Power+density%22">Power density</searchLink><br /><searchLink fieldCode="DE" term="%22Sunrise+%26+sunset%22">Sunrise & sunset</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The spatial distributions of single‐frequency and dual‐frequency Electromagnetic ion cyclotron (EMIC) waves in the subauroral ionosphere are investigated under varying geomagnetic activities, using high‐resolution magnetic field data from dual Swarm satellites spanning from 2015 to 2017. Single‐frequency EMIC waves predominantly occur in the dawn sector, whereas dual‐frequency waves exhibit peaks around both dawn and dusk. The occurrence rate of dual‐frequency waves shows a more pronounced increase with increasing geomagnetic activity. As magnetic storms evolve, both types of EMIC waves shift from dusk to dawn. The South Atlantic Anomaly (SAA) emerges as a high‐incidence region for ionospheric EMIC waves. Dual‐frequency EMIC waves display lower frequencies compared to other regions. Additionally, the low‐frequency components of dual‐frequency waves observed at higher latitudes demonstrate greater power density and longer durations than their high‐frequency counterparts. This suggests that higher frequency waves experience more significant damping during propagation. Most dual‐frequency EMIC waves observed in the ionosphere belong to the O‐band and He‐band waves, indicating that magnetospheric bands below the cyclotron frequency of H+ are more likely to propagate into the ionosphere. Key Points: Single‐frequency ionospheric electromagnetic ion cyclotron (EMIC) waves mainly occur in the dawn sector while dual‐frequency EMIC waves peak around dawn and duskThe occurrence rate of dual‐frequency waves increases more significantly with enhanced geomagnetic activity than single‐frequency wavesLow‐frequency components of dual‐frequency waves observed at higher latitudes exhibit greater power density and extended duration [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=179878144
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1029/2024JA033031
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 17
        StartPage: 1
    Subjects:
      – SubjectFull: Magnetic storms
        Type: general
      – SubjectFull: Ionosphere
        Type: general
      – SubjectFull: Magnetic fields
        Type: general
      – SubjectFull: Power density
        Type: general
      – SubjectFull: Sunrise & sunset
        Type: general
    Titles:
      – TitleFull: Spatial Distribution and Wave Property of Dual‐Frequency EMIC Waves: Swarm Observations.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Wang, C. Z.
      – PersonEntity:
          Name:
            NameFull: Wang, H.
      – PersonEntity:
          Name:
            NameFull: Zhang, K. D.
      – PersonEntity:
          Name:
            NameFull: Zhong, Y. F.
      – PersonEntity:
          Name:
            NameFull: Xia, H.
      – PersonEntity:
          Name:
            NameFull: Sun, Y.
      – PersonEntity:
          Name:
            NameFull: Cheng, Q. H.
      – PersonEntity:
          Name:
            NameFull: Leng, Z. Y.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 09
              Text: Sep2024
              Type: published
              Y: 2024
          Identifiers:
            – Type: issn-print
              Value: 21699380
          Numbering:
            – Type: volume
              Value: 129
            – Type: issue
              Value: 9
          Titles:
            – TitleFull: Journal of Geophysical Research. Space Physics
              Type: main
ResultId 1