A simulation study on the impact of altitudinal dependent vertical plasma drift on the equatorial ionosphere in the evening
We carry out a simulation study on the impact of altitudinal dependent plasma drift on the equatorial ionosphere in the evening, under geomagnetically quiet conditions. Our study used the vertical plasma drift velocity data measured by an incoherent scatter radar at Jicamarca (11.95°S, 76.87°W). The...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2015
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| Online Access: | https://hdl.handle.net/10356/103080 http://hdl.handle.net/10220/25838 |
| _version_ | 1826110830256586752 |
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| author | Qian, Cheng Lei, Jiuhou Wang, Wenbin |
| author2 | School of Computer Engineering |
| author_facet | School of Computer Engineering Qian, Cheng Lei, Jiuhou Wang, Wenbin |
| author_sort | Qian, Cheng |
| collection | NTU |
| description | We carry out a simulation study on the impact of altitudinal dependent plasma drift on the equatorial ionosphere in the evening, under geomagnetically quiet conditions. Our study used the vertical plasma drift velocity data measured by an incoherent scatter radar at Jicamarca (11.95°S, 76.87°W). The data covered the local sunset period on 15 and 16 November 2004. The plasma drift had significant altitudinal variations in the vertical component, which is perpendicular to the magnetic field. We employed SAMI2 (SAMI2 is another model of the ionosphere) to evaluate the effect of the altitude-dependent ion drift on the equatorial ionosphere. Three types of plasma drift velocity inputs were used in our simulations. The first input is calculated from an empirical model, the second is a height-averaged drift obtained from the observed drift velocity, and the third one corresponds to the observed altitudinal dependent drift data. A strong equatorial ionization anomaly occurred in the results of all numerical experiments. Additional layers (F3 layers) in electron densities over the equatorial F region and “arch” latitudinal structures extending to lower middle latitudes were seen in the simulations driven by the observed altitudinal dependent drift. We further show that neutral winds do not have a significant effect on the simulated F3 layers. The results of our numerical experiments suggest that the simulated additional ionospheric layers and arch structures are associated with the altitudinal gradients in the vertical plasma drift velocity. |
| first_indexed | 2024-10-01T02:40:55Z |
| format | Journal Article |
| id | ntu-10356/103080 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:40:55Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/1030802020-05-28T07:19:06Z A simulation study on the impact of altitudinal dependent vertical plasma drift on the equatorial ionosphere in the evening Qian, Cheng Lei, Jiuhou Wang, Wenbin School of Computer Engineering DRNTU::Science::Physics::Geophysics and geomagnetism We carry out a simulation study on the impact of altitudinal dependent plasma drift on the equatorial ionosphere in the evening, under geomagnetically quiet conditions. Our study used the vertical plasma drift velocity data measured by an incoherent scatter radar at Jicamarca (11.95°S, 76.87°W). The data covered the local sunset period on 15 and 16 November 2004. The plasma drift had significant altitudinal variations in the vertical component, which is perpendicular to the magnetic field. We employed SAMI2 (SAMI2 is another model of the ionosphere) to evaluate the effect of the altitude-dependent ion drift on the equatorial ionosphere. Three types of plasma drift velocity inputs were used in our simulations. The first input is calculated from an empirical model, the second is a height-averaged drift obtained from the observed drift velocity, and the third one corresponds to the observed altitudinal dependent drift data. A strong equatorial ionization anomaly occurred in the results of all numerical experiments. Additional layers (F3 layers) in electron densities over the equatorial F region and “arch” latitudinal structures extending to lower middle latitudes were seen in the simulations driven by the observed altitudinal dependent drift. We further show that neutral winds do not have a significant effect on the simulated F3 layers. The results of our numerical experiments suggest that the simulated additional ionospheric layers and arch structures are associated with the altitudinal gradients in the vertical plasma drift velocity. Published version 2015-06-08T07:18:45Z 2019-12-06T21:05:09Z 2015-06-08T07:18:45Z 2019-12-06T21:05:09Z 2015 2015 Journal Article Qian, C., Lei, J., & Wang, W. (2015). A simulation study on the impact of altitudinal dependent vertical plasma drift on the equatorial ionosphere in the evening. Journal of geophysical research : space physics, 120(4), 2918-2925. 2169-9380 https://hdl.handle.net/10356/103080 http://hdl.handle.net/10220/25838 10.1002/2014JA020626 en Journal of geophysical research : space physics © 2015 American Geophysical Union. This paper was published in Journal of Geophysical Research: Space Physics and is made available as an electronic reprint (preprint) with permission of American Geophysical Union. The paper can be found at the following official DOI: [http://dx.doi.org/10.1002/2014JA020626]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf |
| spellingShingle | DRNTU::Science::Physics::Geophysics and geomagnetism Qian, Cheng Lei, Jiuhou Wang, Wenbin A simulation study on the impact of altitudinal dependent vertical plasma drift on the equatorial ionosphere in the evening |
| title | A simulation study on the impact of altitudinal dependent vertical plasma drift on the equatorial ionosphere in the evening |
| title_full | A simulation study on the impact of altitudinal dependent vertical plasma drift on the equatorial ionosphere in the evening |
| title_fullStr | A simulation study on the impact of altitudinal dependent vertical plasma drift on the equatorial ionosphere in the evening |
| title_full_unstemmed | A simulation study on the impact of altitudinal dependent vertical plasma drift on the equatorial ionosphere in the evening |
| title_short | A simulation study on the impact of altitudinal dependent vertical plasma drift on the equatorial ionosphere in the evening |
| title_sort | simulation study on the impact of altitudinal dependent vertical plasma drift on the equatorial ionosphere in the evening |
| topic | DRNTU::Science::Physics::Geophysics and geomagnetism |
| url | https://hdl.handle.net/10356/103080 http://hdl.handle.net/10220/25838 |
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