Disappearance of the Polar Cap Ionosphere During Geomagnetic Storm on 11 May 2019
Abstract Multi‐instrument data from Jang Bogo Station (JBS) in Antarctica were utilized to study ionospheric responses to the 11 May 2019 moderate geomagnetic storm. These include Vertical Incident Pulsed Ionospheric Radar (VIPIR)/Dynasonde, Fabry‐Perot Interferometer (FPI), GPS vertical total elect...
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| Language: | English |
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Wiley
2022-06-01
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| Series: | Space Weather |
| Online Access: | https://doi.org/10.1029/2022SW003054 |
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| author | H.‐J. Kwon K.‐H. Kim G. Jee J. Seon C. Lee Y.‐B. Ham J. Hong E. Kim T. Bullett H.‐U. Auster W. Magnes S. Kraft |
| author_facet | H.‐J. Kwon K.‐H. Kim G. Jee J. Seon C. Lee Y.‐B. Ham J. Hong E. Kim T. Bullett H.‐U. Auster W. Magnes S. Kraft |
| author_sort | H.‐J. Kwon |
| collection | DOAJ |
| description | Abstract Multi‐instrument data from Jang Bogo Station (JBS) in Antarctica were utilized to study ionospheric responses to the 11 May 2019 moderate geomagnetic storm. These include Vertical Incident Pulsed Ionospheric Radar (VIPIR)/Dynasonde, Fabry‐Perot Interferometer (FPI), GPS vertical total electron content (vTEC), and magnetometer. The VIPIR/Dynasonde observed long‐lasting (>11 hr) severe depletion of the electron density in the F‐region ionosphere over JBS. During the depletion interval, GPS TEC also correspondingly decreased, FPI neutral temperature was significantly enhanced, and the polar magnetic field variations showed positive and negative excursions in the Y (east) and Z (vertical) components, respectively. GK‐2 A satellite, located ∼2.5 hr west of JBS, observed negative magnetic field perturbations in the azimuthal BD component at geosynchronous orbit during the depletion of ionospheric plasma. Such a BD perturbation at geosynchronous orbit is due to the field‐aligned currents flowing out of the ionosphere. From these observations we suggest that transpolar ionospheric currents connected to the field‐aligned currents flowing on a substorm wedge‐shaped circuit act as a source of polar atmospheric heating during the moderate geomagnetic storm interval and that elevated heavy molecular gases (O2 and N2) by atmospheric heating contribute to the electron density depletion via increased recombination rate. |
| format | Article |
| id | doaj-art-d64ab551cc734a6aa048133cd9f57e38 |
| institution | Kabale University |
| issn | 1542-7390 |
| language | English |
| publishDate | 2022-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Space Weather |
| spelling | doaj-art-d64ab551cc734a6aa048133cd9f57e382025-01-14T16:27:09ZengWileySpace Weather1542-73902022-06-01206n/an/a10.1029/2022SW003054Disappearance of the Polar Cap Ionosphere During Geomagnetic Storm on 11 May 2019H.‐J. Kwon0K.‐H. Kim1G. Jee2J. Seon3C. Lee4Y.‐B. Ham5J. Hong6E. Kim7T. Bullett8H.‐U. Auster9W. Magnes10S. Kraft11Division of Atmospheric Sciences Korea Polar Research Institute Incheon KoreaSchool of Space Research Kyung Hee University Yongin KoreaDivision of Atmospheric Sciences Korea Polar Research Institute Incheon KoreaSchool of Space Research Kyung Hee University Yongin KoreaDivision of Atmospheric Sciences Korea Polar Research Institute Incheon KoreaDivision of Atmospheric Sciences Korea Polar Research Institute Incheon KoreaSpace Science Division Korea Astronomy and Space Science Institute Daejeon KoreaDivision of Atmospheric Sciences Korea Polar Research Institute Incheon KoreaCooperative Institute for Research in Environmental Sciences University of Colorado Boulder CO USAIntitute of Geophysics and Extraterrestrial Physics Technishe Iniversität Braunschweig Braunschweig GermanySpace Research Institute Austrian Academy of Sciences Graz AustriaESOC European Space Agency Paris FranceAbstract Multi‐instrument data from Jang Bogo Station (JBS) in Antarctica were utilized to study ionospheric responses to the 11 May 2019 moderate geomagnetic storm. These include Vertical Incident Pulsed Ionospheric Radar (VIPIR)/Dynasonde, Fabry‐Perot Interferometer (FPI), GPS vertical total electron content (vTEC), and magnetometer. The VIPIR/Dynasonde observed long‐lasting (>11 hr) severe depletion of the electron density in the F‐region ionosphere over JBS. During the depletion interval, GPS TEC also correspondingly decreased, FPI neutral temperature was significantly enhanced, and the polar magnetic field variations showed positive and negative excursions in the Y (east) and Z (vertical) components, respectively. GK‐2 A satellite, located ∼2.5 hr west of JBS, observed negative magnetic field perturbations in the azimuthal BD component at geosynchronous orbit during the depletion of ionospheric plasma. Such a BD perturbation at geosynchronous orbit is due to the field‐aligned currents flowing out of the ionosphere. From these observations we suggest that transpolar ionospheric currents connected to the field‐aligned currents flowing on a substorm wedge‐shaped circuit act as a source of polar atmospheric heating during the moderate geomagnetic storm interval and that elevated heavy molecular gases (O2 and N2) by atmospheric heating contribute to the electron density depletion via increased recombination rate.https://doi.org/10.1029/2022SW003054 |
| spellingShingle | H.‐J. Kwon K.‐H. Kim G. Jee J. Seon C. Lee Y.‐B. Ham J. Hong E. Kim T. Bullett H.‐U. Auster W. Magnes S. Kraft Disappearance of the Polar Cap Ionosphere During Geomagnetic Storm on 11 May 2019 Space Weather |
| title | Disappearance of the Polar Cap Ionosphere During Geomagnetic Storm on 11 May 2019 |
| title_full | Disappearance of the Polar Cap Ionosphere During Geomagnetic Storm on 11 May 2019 |
| title_fullStr | Disappearance of the Polar Cap Ionosphere During Geomagnetic Storm on 11 May 2019 |
| title_full_unstemmed | Disappearance of the Polar Cap Ionosphere During Geomagnetic Storm on 11 May 2019 |
| title_short | Disappearance of the Polar Cap Ionosphere During Geomagnetic Storm on 11 May 2019 |
| title_sort | disappearance of the polar cap ionosphere during geomagnetic storm on 11 may 2019 |
| url | https://doi.org/10.1029/2022SW003054 |
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