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A comparison between large-scale irregularities and scintillations in the polar ionosphere

Wang, Y., Zhang, Q. -H., Jayachandran, P. T., Lockwood, M. ORCID:, Zhang, S. -R., Moen, J., Xing, Z. -Y., Ma, Y. -Z. and Lester, M. (2016) A comparison between large-scale irregularities and scintillations in the polar ionosphere. Geophysical Research Letters, 43 (10). pp. 4790-4798. ISSN 1944-8007

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To link to this item DOI: 10.1002/2016GL069230


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 are pursued during a geomagnetic storm. Irregularities, such as storm enhanced density (SED), 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 (σsub{φ}) 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 σsub{φ}, most likely caused by particle precipitations around the exiting polar cap patches.

Item Type:Article
Divisions:Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:65711
Publisher:American Geophysical Union


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