High-latitude polar pattern of ionospheric electron density: Scaling features and IMF dependence.
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| Title: | High-latitude polar pattern of ionospheric electron density: Scaling features and IMF dependence. |
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| Authors: | Consolini, G.1 (AUTHOR) giuseppe.consolini@inaf.it, Tozzi, R.2 (AUTHOR) roberta.tozzi@ingv.it, De Michelis, P.2 (AUTHOR) paola.demichelis@ingv.it, Coco, I.2 (AUTHOR) igino.coco@ingv.it, Giannattasio, F.2 (AUTHOR) fabio.giannattasio@ingv.it, Pezzopane, M.2 (AUTHOR) michael.pezzopane@ingv.it, Marcucci, M.F.1 (AUTHOR) federica.marcucci@inaf.it, Balasis, G.3 (AUTHOR) gbalasis@noa.gr |
| Source: | Journal of Atmospheric & Solar-Terrestrial Physics. Jun2021, Vol. 217, pN.PAG-N.PAG. 1p. |
| Subjects: | European Space Agency, Ionospheric electron density, Electron density, Interplanetary magnetic fields, Solar activity, Solar cycle |
| Abstract: | We investigated the average polar patterns of ionospheric electron density and the corresponding patterns of scaling features as a function of interplanetary magnetic field orientation. The focus is on the Northern Hemisphere using electron density data recorded on-board ESA Swarm A satellite. The first- and second-order scaling exponents have been evaluated by means of the q t h -order structure functions. We used electron density measurements over a period of 15 months from April 1, 2014 to June 30, 2015, which corresponds to the maximum of solar cycle 24 and which is characterized by an average value of the solar radio flux (F10.7) index equal to (140 ± 30) sfu. Electron density, first- and second-order scaling exponents have been mapped and discussed for four main IMF orientations provided by B y and B z components under conditions of high solar activity. Large spatial changes of the second-order scaling exponent pattern are observed with a steepening of the associated spectral exponent in correspondence with the nightside polar cap trailing edge. Intermittency, defined as the departure from linearity of the dependence of scaling exponents on moment order q , is also evaluated finding that it is generally higher near the equatorward boundary of the auroral oval than elsewhere. On the whole, the found patterns of the electron density first- and second-order scaling exponents suggest the occurrence of turbulence at the high latitudes. • The average polar patterns of ESA Swarm A electron density and of its scaling features are investigated as a function of IMF. • Spatial changes of the second-order scaling exponent patterns are observed in the nightside polar cap. • Intermittency is generally higher near the equatorward boundary of the auroral oval than elsewhere. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Atmospheric & Solar-Terrestrial Physics is the property of Pergamon Press - An Imprint of Elsevier Science 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: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 149760692 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: High-latitude polar pattern of ionospheric electron density: Scaling features and IMF dependence. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Consolini%2C+G%2E%22">Consolini, G.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> giuseppe.consolini@inaf.it</i><br /><searchLink fieldCode="AR" term="%22Tozzi%2C+R%2E%22">Tozzi, R.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> roberta.tozzi@ingv.it</i><br /><searchLink fieldCode="AR" term="%22De+Michelis%2C+P%2E%22">De Michelis, P.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> paola.demichelis@ingv.it</i><br /><searchLink fieldCode="AR" term="%22Coco%2C+I%2E%22">Coco, I.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> igino.coco@ingv.it</i><br /><searchLink fieldCode="AR" term="%22Giannattasio%2C+F%2E%22">Giannattasio, F.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> fabio.giannattasio@ingv.it</i><br /><searchLink fieldCode="AR" term="%22Pezzopane%2C+M%2E%22">Pezzopane, M.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> michael.pezzopane@ingv.it</i><br /><searchLink fieldCode="AR" term="%22Marcucci%2C+M%2EF%2E%22">Marcucci, M.F.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> federica.marcucci@inaf.it</i><br /><searchLink fieldCode="AR" term="%22Balasis%2C+G%2E%22">Balasis, G.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> gbalasis@noa.gr</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Atmospheric+%26+Solar-Terrestrial+Physics%22">Journal of Atmospheric & Solar-Terrestrial Physics</searchLink>. Jun2021, Vol. 217, pN.PAG-N.PAG. 1p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22European+Space+Agency%22">European Space Agency</searchLink><br /><searchLink fieldCode="DE" term="%22Ionospheric+electron+density%22">Ionospheric electron density</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+density%22">Electron density</searchLink><br /><searchLink fieldCode="DE" term="%22Interplanetary+magnetic+fields%22">Interplanetary magnetic fields</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+activity%22">Solar activity</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+cycle%22">Solar cycle</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: We investigated the average polar patterns of ionospheric electron density and the corresponding patterns of scaling features as a function of interplanetary magnetic field orientation. The focus is on the Northern Hemisphere using electron density data recorded on-board ESA Swarm A satellite. The first- and second-order scaling exponents have been evaluated by means of the q t h -order structure functions. We used electron density measurements over a period of 15 months from April 1, 2014 to June 30, 2015, which corresponds to the maximum of solar cycle 24 and which is characterized by an average value of the solar radio flux (F10.7) index equal to (140 ± 30) sfu. Electron density, first- and second-order scaling exponents have been mapped and discussed for four main IMF orientations provided by B y and B z components under conditions of high solar activity. Large spatial changes of the second-order scaling exponent pattern are observed with a steepening of the associated spectral exponent in correspondence with the nightside polar cap trailing edge. Intermittency, defined as the departure from linearity of the dependence of scaling exponents on moment order q , is also evaluated finding that it is generally higher near the equatorward boundary of the auroral oval than elsewhere. On the whole, the found patterns of the electron density first- and second-order scaling exponents suggest the occurrence of turbulence at the high latitudes. • The average polar patterns of ESA Swarm A electron density and of its scaling features are investigated as a function of IMF. • Spatial changes of the second-order scaling exponent patterns are observed in the nightside polar cap. • Intermittency is generally higher near the equatorward boundary of the auroral oval than elsewhere. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Atmospheric & Solar-Terrestrial Physics is the property of Pergamon Press - An Imprint of Elsevier Science 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: 10.1016/j.jastp.2020.105531 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: N.PAG Subjects: – SubjectFull: European Space Agency Type: general – SubjectFull: Ionospheric electron density Type: general – SubjectFull: Electron density Type: general – SubjectFull: Interplanetary magnetic fields Type: general – SubjectFull: Solar activity Type: general – SubjectFull: Solar cycle Type: general Titles: – TitleFull: High-latitude polar pattern of ionospheric electron density: Scaling features and IMF dependence. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Consolini, G. – PersonEntity: Name: NameFull: Tozzi, R. – PersonEntity: Name: NameFull: De Michelis, P. – PersonEntity: Name: NameFull: Coco, I. – PersonEntity: Name: NameFull: Giannattasio, F. – PersonEntity: Name: NameFull: Pezzopane, M. – PersonEntity: Name: NameFull: Marcucci, M.F. – PersonEntity: Name: NameFull: Balasis, G. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2021 Type: published Y: 2021 Identifiers: – Type: issn-print Value: 13646826 Numbering: – Type: volume Value: 217 Titles: – TitleFull: Journal of Atmospheric & Solar-Terrestrial Physics Type: main |
| ResultId | 1 |
