A comparison between large‐scale irregularities and scintillations in the polar ionosphere
Abstract A comparison tool has been developed by mapping the global GPS total electron content (TEC) and large coverage of ionospheric scintillations together on the geomagnetic latitude/magnetic local time coordinates. Using this tool, a comparison between large‐scale ionospheric irregularities and...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2016-05-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL069230 |
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| author | Y. Wang Q.‐H. Zhang P. T. Jayachandran M. Lockwood S.‐R. Zhang J. Moen Z.‐Y. Xing Y.‐Z. Ma M. Lester |
| author_facet | Y. Wang Q.‐H. Zhang P. T. Jayachandran M. Lockwood S.‐R. Zhang J. Moen Z.‐Y. Xing Y.‐Z. Ma M. Lester |
| author_sort | Y. Wang |
| collection | DOAJ |
| description | Abstract A comparison tool has been developed by mapping the global GPS total electron content (TEC) and large coverage of ionospheric scintillations together on the geomagnetic latitude/magnetic local time coordinates. Using this tool, a comparison between large‐scale ionospheric irregularities and scintillations is pursued during a geomagnetic storm. Irregularities, such as storm enhanced density, middle‐latitude trough, and polar cap patches, are clearly identified from the TEC maps. At the edges of these irregularities, clear scintillations appeared but their behaviors were different. Phase scintillations (σφ) were almost always larger than amplitude scintillations (S4) at the edges of these irregularities, associated with bursty flows or flow reversals with large density gradients. An unexpected scintillation feature appeared inside the modeled auroral oval where S4 were much larger than σφ, most likely caused by particle precipitations around the exiting polar cap patches. |
| format | Article |
| id | doaj-art-c4aa3c9b60cd452a860fbf057b8a2722 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-c4aa3c9b60cd452a860fbf057b8a27222025-08-20T03:49:46ZengWileyGeophysical Research Letters0094-82761944-80072016-05-0143104790479810.1002/2016GL069230A comparison between large‐scale irregularities and scintillations in the polar ionosphereY. Wang0Q.‐H. Zhang1P. T. Jayachandran2M. Lockwood3S.‐R. Zhang4J. Moen5Z.‐Y. Xing6Y.‐Z. Ma7M. Lester8Shandong Provincial Key Laboratory of Optical Astronomy and Solar‐Terrestrial Environment, Institute of Space Sciences Shandong University Weihai ChinaShandong Provincial Key Laboratory of Optical Astronomy and Solar‐Terrestrial Environment, Institute of Space Sciences Shandong University Weihai ChinaPhysics Department University of New Brunswick Fredericton New Brunswick CanadaDepartment of Meteorology University of Reading Reading UKHaystack Observatory Massachusetts Institute of Technology Cambridge Massachusetts USADepartment of Physics University of Oslo Oslo NorwayShandong Provincial Key Laboratory of Optical Astronomy and Solar‐Terrestrial Environment, Institute of Space Sciences Shandong University Weihai ChinaShandong Provincial Key Laboratory of Optical Astronomy and Solar‐Terrestrial Environment, Institute of Space Sciences Shandong University Weihai ChinaDepartment of Physics and Astronomy University of Leicester Leicester UKAbstract A comparison tool has been developed by mapping the global GPS total electron content (TEC) and large coverage of ionospheric scintillations together on the geomagnetic latitude/magnetic local time coordinates. Using this tool, a comparison between large‐scale ionospheric irregularities and scintillations is pursued during a geomagnetic storm. Irregularities, such as storm enhanced density, middle‐latitude trough, and polar cap patches, are clearly identified from the TEC maps. At the edges of these irregularities, clear scintillations appeared but their behaviors were different. Phase scintillations (σφ) were almost always larger than amplitude scintillations (S4) at the edges of these irregularities, associated with bursty flows or flow reversals with large density gradients. An unexpected scintillation feature appeared inside the modeled auroral oval where S4 were much larger than σφ, most likely caused by particle precipitations around the exiting polar cap patches.https://doi.org/10.1002/2016GL069230ionospheric irregularitiesionospheric scintillationspolar ionosphereGPS TECSuperDARN |
| spellingShingle | Y. Wang Q.‐H. Zhang P. T. Jayachandran M. Lockwood S.‐R. Zhang J. Moen Z.‐Y. Xing Y.‐Z. Ma M. Lester A comparison between large‐scale irregularities and scintillations in the polar ionosphere Geophysical Research Letters ionospheric irregularities ionospheric scintillations polar ionosphere GPS TEC SuperDARN |
| title | A comparison between large‐scale irregularities and scintillations in the polar ionosphere |
| title_full | A comparison between large‐scale irregularities and scintillations in the polar ionosphere |
| title_fullStr | A comparison between large‐scale irregularities and scintillations in the polar ionosphere |
| title_full_unstemmed | A comparison between large‐scale irregularities and scintillations in the polar ionosphere |
| title_short | A comparison between large‐scale irregularities and scintillations in the polar ionosphere |
| title_sort | comparison between large scale irregularities and scintillations in the polar ionosphere |
| topic | ionospheric irregularities ionospheric scintillations polar ionosphere GPS TEC SuperDARN |
| url | https://doi.org/10.1002/2016GL069230 |
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