Multi‐Spacecraft Measurement of Anisotropic Spatial Correlation Functions at Kinetic Range in the Magnetosheath Turbulence.
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| Title: | Multi‐Spacecraft Measurement of Anisotropic Spatial Correlation Functions at Kinetic Range in the Magnetosheath Turbulence. |
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| Authors: | Huang, S. Y.1 shiyonghuang@msn.com, Xiong, Q. Y.1, Yuan, Z. G.1, Zhan, H. L.1, Deng, X. H.2, Jiang, K.1, Zhao, P. F.1, Zhang, J.1, Xu, S. B.1, Wei, Y. Y.1, Yu, L.1, Lin, T. R.1 |
| Source: | Journal of Geophysical Research. Space Physics. May2021, Vol. 126 Issue 5, p1-10. 10p. |
| Subject Terms: | Space vehicles, Enhanced magnetoresistance, Magnetoresistance, Magnetic fields, Cluster analysis (Statistics) |
| Abstract: | We investigate spatial correlation functions (SCFs) at kinetic range in the terrestrial magnetosheath because of wide angular distributions of the magnetic field fluctuations and the high Signal‐to‐Noise‐Ratio. We employ four‐point measurements of magnetic fluctuations from the Cluster and MMS concerning a spatiotemporally varying background magnetic field to constitute the two‐dimensional (2‐D) SCFs between ion and electron scales. It is found that two populations exist in the 2‐D SCFs, with the minority elongated along the perpendicular coordinate (S⊥) and the majority of population elongated along the coordinate parallel to average magnetic field (S||). This kind of phenomenon indicates that the distribution of magnetosheath turbulence in the wavenumber space is dominantly transverse to the background magnetic field, simultaneously partly along the field (i.e., k⊥ >> k||). In addition, we find that magnetosheath turbulence is the dominance of shear Alfvénic‐like fluctuations, and is quasi‐monofractal intermittent turbulence at kinetic range for both the Cluster case and the MMS case, indicating that strong spatially anisotropic fluctuations may be universal in the magnetosheath. Our observations pose new challenges to the theoretical modeling of turbulence and dissipation at kinetic range in the collisionless magnetized plasma. Key Points: Two populations exist in the two‐dimensional SCFs at kinetic range in the magnetosheath turbulence.The major population elongated along the coordinate parallel to B0 and the minor one elongated along the perpendicular coordinate.Magnetosheath turbulence is the dominance of shear Alfvénic‐like fluctuations, and is multifractal intermittent turbulence at kinetic range. [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.) | |
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| Header | DbId: 8gh DbLabel: GreenFILE An: 150678984 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Multi‐Spacecraft Measurement of Anisotropic Spatial Correlation Functions at Kinetic Range in the Magnetosheath Turbulence. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Huang%2C+S%2E+Y%2E%22">Huang, S. Y.</searchLink><relatesTo>1</relatesTo><i> shiyonghuang@msn.com</i><br /><searchLink fieldCode="AR" term="%22Xiong%2C+Q%2E+Y%2E%22">Xiong, Q. Y.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Yuan%2C+Z%2E+G%2E%22">Yuan, Z. G.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhan%2C+H%2E+L%2E%22">Zhan, H. L.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Deng%2C+X%2E+H%2E%22">Deng, X. H.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Jiang%2C+K%2E%22">Jiang, K.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhao%2C+P%2E+F%2E%22">Zhao, P. F.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhang%2C+J%2E%22">Zhang, J.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Xu%2C+S%2E+B%2E%22">Xu, S. B.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Wei%2C+Y%2E+Y%2E%22">Wei, Y. Y.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Yu%2C+L%2E%22">Yu, L.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Lin%2C+T%2E+R%2E%22">Lin, T. R.</searchLink><relatesTo>1</relatesTo> – 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>. May2021, Vol. 126 Issue 5, p1-10. 10p. – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Space+vehicles%22">Space vehicles</searchLink><br /><searchLink fieldCode="DE" term="%22Enhanced+magnetoresistance%22">Enhanced magnetoresistance</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetoresistance%22">Magnetoresistance</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+fields%22">Magnetic fields</searchLink><br /><searchLink fieldCode="DE" term="%22Cluster+analysis+%28Statistics%29%22">Cluster analysis (Statistics)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: We investigate spatial correlation functions (SCFs) at kinetic range in the terrestrial magnetosheath because of wide angular distributions of the magnetic field fluctuations and the high Signal‐to‐Noise‐Ratio. We employ four‐point measurements of magnetic fluctuations from the Cluster and MMS concerning a spatiotemporally varying background magnetic field to constitute the two‐dimensional (2‐D) SCFs between ion and electron scales. It is found that two populations exist in the 2‐D SCFs, with the minority elongated along the perpendicular coordinate (S⊥) and the majority of population elongated along the coordinate parallel to average magnetic field (S||). This kind of phenomenon indicates that the distribution of magnetosheath turbulence in the wavenumber space is dominantly transverse to the background magnetic field, simultaneously partly along the field (i.e., k⊥ >> k||). In addition, we find that magnetosheath turbulence is the dominance of shear Alfvénic‐like fluctuations, and is quasi‐monofractal intermittent turbulence at kinetic range for both the Cluster case and the MMS case, indicating that strong spatially anisotropic fluctuations may be universal in the magnetosheath. Our observations pose new challenges to the theoretical modeling of turbulence and dissipation at kinetic range in the collisionless magnetized plasma. Key Points: Two populations exist in the two‐dimensional SCFs at kinetic range in the magnetosheath turbulence.The major population elongated along the coordinate parallel to B0 and the minor one elongated along the perpendicular coordinate.Magnetosheath turbulence is the dominance of shear Alfvénic‐like fluctuations, and is multifractal intermittent turbulence at kinetic range. [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.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1029/2020JA028780 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 1 Subjects: – SubjectFull: Space vehicles Type: general – SubjectFull: Enhanced magnetoresistance Type: general – SubjectFull: Magnetoresistance Type: general – SubjectFull: Magnetic fields Type: general – SubjectFull: Cluster analysis (Statistics) Type: general Titles: – TitleFull: Multi‐Spacecraft Measurement of Anisotropic Spatial Correlation Functions at Kinetic Range in the Magnetosheath Turbulence. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Huang, S. Y. – PersonEntity: Name: NameFull: Xiong, Q. Y. – PersonEntity: Name: NameFull: Yuan, Z. G. – PersonEntity: Name: NameFull: Zhan, H. L. – PersonEntity: Name: NameFull: Deng, X. H. – PersonEntity: Name: NameFull: Jiang, K. – PersonEntity: Name: NameFull: Zhao, P. F. – PersonEntity: Name: NameFull: Zhang, J. – PersonEntity: Name: NameFull: Xu, S. B. – PersonEntity: Name: NameFull: Wei, Y. Y. – PersonEntity: Name: NameFull: Yu, L. – PersonEntity: Name: NameFull: Lin, T. R. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2021 Type: published Y: 2021 Identifiers: – Type: issn-print Value: 21699380 Numbering: – Type: volume Value: 126 – Type: issue Value: 5 Titles: – TitleFull: Journal of Geophysical Research. Space Physics Type: main |
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