Ionospheric Response to the Coronal Hole Activity of August 2020: A Global Multi‐Instrumental Overview
Abstract We have studied the ionospheric response to a coronal hole event of August 2020 using the data from global ionospheric maps, ground magnetometers and parameters from the instruments onboard SWARM and thermosphere, ionosphere, mesosphere energetics and dynamics satellites. The role of differ...
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Wiley
2022-12-01
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| Series: | Space Weather |
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| Online Access: | https://doi.org/10.1029/2022SW003176 |
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| author | Waqar Younas Majid Khan C. Amory‐Mazaudier P. O. Amaechi |
| author_facet | Waqar Younas Majid Khan C. Amory‐Mazaudier P. O. Amaechi |
| author_sort | Waqar Younas |
| collection | DOAJ |
| description | Abstract We have studied the ionospheric response to a coronal hole event of August 2020 using the data from global ionospheric maps, ground magnetometers and parameters from the instruments onboard SWARM and thermosphere, ionosphere, mesosphere energetics and dynamics satellites. The role of different physical drivers, responsible for observed ionospheric disturbance, has been identified. On the storm day (2 August), a steady southward directed interplanetary magnetic field Bz caused the penetration of magnetospheric convection electric field and positive storm effect in daytime sectors. As a result of prompt penetration electric field (PPEF) on 2 August, a polar‐ward expansion of day‐side ionospheric plasma. On 3 August, the signatures of both disturbance dynamo electric field (DDEF) caused by disturbed thermospheric winds and PPEF have been observed. The westward PPEF and eastward disturbance DDEF on the night‐side caused a strong enhancement in ionospheric plasma parameters at the corresponding sectors. The effect of disturbed thermospheric winds and resultant electric field persisted till the end of 7 August. The large decrease in O/N2 ratio at northern mid‐latitudes which is a consequence of the seasonal impact resulted in the negative storm effects at corresponding latitudinal regions. This study has shown that although the storm of August 2020 was a minor one, the associated high speed solar wind streams emanating from a coronal hole resulted in drastic changes in ionospheric parameters including global electron content, in situ electron density and total electron content at the equatorial ionization anomaly and equatorial electric field. |
| format | Article |
| id | doaj-art-123d09c36c69450eb0aae95e13d6df09 |
| institution | Kabale University |
| issn | 1542-7390 |
| language | English |
| publishDate | 2022-12-01 |
| publisher | Wiley |
| record_format | Article |
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| spelling | doaj-art-123d09c36c69450eb0aae95e13d6df092025-01-14T16:30:23ZengWileySpace Weather1542-73902022-12-012012n/an/a10.1029/2022SW003176Ionospheric Response to the Coronal Hole Activity of August 2020: A Global Multi‐Instrumental OverviewWaqar Younas0Majid Khan1C. Amory‐Mazaudier2P. O. Amaechi3Department of Physics Quaid‐i‐Azam University Islamabad PakistanDepartment of Physics Quaid‐i‐Azam University Islamabad PakistanSorbonne Université Ecole Polytechnique Institut Polytechnique de Paris Université Paris Saclay Observatoire de Paris CNRS Laboratoire de Physique des Plasmas (LPP) Paris FranceCardiff School of Education and Social Policy Cardiff Metropolitan University ‐ Cyncoed Campus Cardiff UKAbstract We have studied the ionospheric response to a coronal hole event of August 2020 using the data from global ionospheric maps, ground magnetometers and parameters from the instruments onboard SWARM and thermosphere, ionosphere, mesosphere energetics and dynamics satellites. The role of different physical drivers, responsible for observed ionospheric disturbance, has been identified. On the storm day (2 August), a steady southward directed interplanetary magnetic field Bz caused the penetration of magnetospheric convection electric field and positive storm effect in daytime sectors. As a result of prompt penetration electric field (PPEF) on 2 August, a polar‐ward expansion of day‐side ionospheric plasma. On 3 August, the signatures of both disturbance dynamo electric field (DDEF) caused by disturbed thermospheric winds and PPEF have been observed. The westward PPEF and eastward disturbance DDEF on the night‐side caused a strong enhancement in ionospheric plasma parameters at the corresponding sectors. The effect of disturbed thermospheric winds and resultant electric field persisted till the end of 7 August. The large decrease in O/N2 ratio at northern mid‐latitudes which is a consequence of the seasonal impact resulted in the negative storm effects at corresponding latitudinal regions. This study has shown that although the storm of August 2020 was a minor one, the associated high speed solar wind streams emanating from a coronal hole resulted in drastic changes in ionospheric parameters including global electron content, in situ electron density and total electron content at the equatorial ionization anomaly and equatorial electric field.https://doi.org/10.1029/2022SW003176coronal holeionospheric disturbancePPEFDDEF |
| spellingShingle | Waqar Younas Majid Khan C. Amory‐Mazaudier P. O. Amaechi Ionospheric Response to the Coronal Hole Activity of August 2020: A Global Multi‐Instrumental Overview Space Weather coronal hole ionospheric disturbance PPEF DDEF |
| title | Ionospheric Response to the Coronal Hole Activity of August 2020: A Global Multi‐Instrumental Overview |
| title_full | Ionospheric Response to the Coronal Hole Activity of August 2020: A Global Multi‐Instrumental Overview |
| title_fullStr | Ionospheric Response to the Coronal Hole Activity of August 2020: A Global Multi‐Instrumental Overview |
| title_full_unstemmed | Ionospheric Response to the Coronal Hole Activity of August 2020: A Global Multi‐Instrumental Overview |
| title_short | Ionospheric Response to the Coronal Hole Activity of August 2020: A Global Multi‐Instrumental Overview |
| title_sort | ionospheric response to the coronal hole activity of august 2020 a global multi instrumental overview |
| topic | coronal hole ionospheric disturbance PPEF DDEF |
| url | https://doi.org/10.1029/2022SW003176 |
| work_keys_str_mv | AT waqaryounas ionosphericresponsetothecoronalholeactivityofaugust2020aglobalmultiinstrumentaloverview AT majidkhan ionosphericresponsetothecoronalholeactivityofaugust2020aglobalmultiinstrumentaloverview AT camorymazaudier ionosphericresponsetothecoronalholeactivityofaugust2020aglobalmultiinstrumentaloverview AT poamaechi ionosphericresponsetothecoronalholeactivityofaugust2020aglobalmultiinstrumentaloverview |