Multi-instrument observations of polar cap patches and traveling ionospheric disturbances generated by solar wind Alfvén waves coupling to the dayside magnetosphere
<p>During minor to moderate geomagnetic storms, caused by corotating interaction regions (CIRs) at the leading edge of high-speed streams (HSSs), solar wind Alfvén waves modulated the magnetic reconnection at the dayside magnetopause. The Resolute Bay Incoherent Scatter Radars (RISR-C and RISR...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2022-11-01
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| Series: | Annales Geophysicae |
| Online Access: | https://angeo.copernicus.org/articles/40/619/2022/angeo-40-619-2022.pdf |
| _version_ | 1811255568426336256 |
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| author | P. Prikryl R. G. Gillies D. R. Themens D. R. Themens J. M. Weygand E. G. Thomas S. Chakraborty |
| author_facet | P. Prikryl R. G. Gillies D. R. Themens D. R. Themens J. M. Weygand E. G. Thomas S. Chakraborty |
| author_sort | P. Prikryl |
| collection | DOAJ |
| description | <p>During minor to moderate geomagnetic storms, caused by corotating
interaction regions (CIRs) at the leading edge of high-speed streams (HSSs), solar wind
Alfvén waves modulated the magnetic reconnection at the dayside
magnetopause. The Resolute Bay Incoherent Scatter Radars (RISR-C and
RISR-N), measuring plasma parameters in the cusp and polar cap, observed
ionospheric signatures of flux transfer events (FTEs) that resulted in the
formation of polar cap patches. The patches were observed as they moved over the RISR, and the Canadian High-Arctic Ionospheric Network (CHAIN)
ionosondes and GPS receivers. The coupling process modulated the ionospheric convection and the intensity of ionospheric currents, including the auroral electrojets. The horizontal equivalent ionospheric currents (EICs) are estimated from ground-based magnetometer data using an inversion technique. Pulses of ionospheric currents that are a source of Joule heating in the lower thermosphere launched atmospheric gravity waves, causing traveling
ionospheric disturbances (TIDs) that propagated equatorward. The TIDs were
observed in the SuperDual Auroral Radar Network (SuperDARN) high-frequency (HF) radar ground
scatter and the detrended total electron content (TEC) measured by globally
distributed Global Navigation Satellite System (GNSS) receivers.</p> |
| first_indexed | 2024-04-12T17:25:48Z |
| format | Article |
| id | doaj.art-d56e0573fcdc4d99a29e4c7bdef1e87b |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-04-12T17:25:48Z |
| publishDate | 2022-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-d56e0573fcdc4d99a29e4c7bdef1e87b2022-12-22T03:23:18ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762022-11-014061963910.5194/angeo-40-619-2022Multi-instrument observations of polar cap patches and traveling ionospheric disturbances generated by solar wind Alfvén waves coupling to the dayside magnetosphereP. Prikryl0R. G. Gillies1D. R. Themens2D. R. Themens3J. M. Weygand4E. G. Thomas5S. Chakraborty6Physics Department, University of New Brunswick, Fredericton, NB, E3B 5A3, CanadaDepartment of Physics and Astronomy, University of Calgary, Calgary, AB, CanadaPhysics Department, University of New Brunswick, Fredericton, NB, E3B 5A3, CanadaSchool of Engineering, University of Birmingham, Birmingham, UKEarth, Planetary, and Space Sciences, University of California, Los Angeles, CA, USAThayer School of Engineering, Dartmouth College, Hanover, NH, USABradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA, USA<p>During minor to moderate geomagnetic storms, caused by corotating interaction regions (CIRs) at the leading edge of high-speed streams (HSSs), solar wind Alfvén waves modulated the magnetic reconnection at the dayside magnetopause. The Resolute Bay Incoherent Scatter Radars (RISR-C and RISR-N), measuring plasma parameters in the cusp and polar cap, observed ionospheric signatures of flux transfer events (FTEs) that resulted in the formation of polar cap patches. The patches were observed as they moved over the RISR, and the Canadian High-Arctic Ionospheric Network (CHAIN) ionosondes and GPS receivers. The coupling process modulated the ionospheric convection and the intensity of ionospheric currents, including the auroral electrojets. The horizontal equivalent ionospheric currents (EICs) are estimated from ground-based magnetometer data using an inversion technique. Pulses of ionospheric currents that are a source of Joule heating in the lower thermosphere launched atmospheric gravity waves, causing traveling ionospheric disturbances (TIDs) that propagated equatorward. The TIDs were observed in the SuperDual Auroral Radar Network (SuperDARN) high-frequency (HF) radar ground scatter and the detrended total electron content (TEC) measured by globally distributed Global Navigation Satellite System (GNSS) receivers.</p>https://angeo.copernicus.org/articles/40/619/2022/angeo-40-619-2022.pdf |
| spellingShingle | P. Prikryl R. G. Gillies D. R. Themens D. R. Themens J. M. Weygand E. G. Thomas S. Chakraborty Multi-instrument observations of polar cap patches and traveling ionospheric disturbances generated by solar wind Alfvén waves coupling to the dayside magnetosphere Annales Geophysicae |
| title | Multi-instrument observations of polar cap patches and traveling ionospheric disturbances generated by solar wind Alfvén waves coupling to the dayside magnetosphere |
| title_full | Multi-instrument observations of polar cap patches and traveling ionospheric disturbances generated by solar wind Alfvén waves coupling to the dayside magnetosphere |
| title_fullStr | Multi-instrument observations of polar cap patches and traveling ionospheric disturbances generated by solar wind Alfvén waves coupling to the dayside magnetosphere |
| title_full_unstemmed | Multi-instrument observations of polar cap patches and traveling ionospheric disturbances generated by solar wind Alfvén waves coupling to the dayside magnetosphere |
| title_short | Multi-instrument observations of polar cap patches and traveling ionospheric disturbances generated by solar wind Alfvén waves coupling to the dayside magnetosphere |
| title_sort | multi instrument observations of polar cap patches and traveling ionospheric disturbances generated by solar wind alfven waves coupling to the dayside magnetosphere |
| url | https://angeo.copernicus.org/articles/40/619/2022/angeo-40-619-2022.pdf |
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