First three-dimensional simulation of the Perkins instability in the nighttime midlatitude ionosphere
A three‐dimensional numerical simulation in the nighttime midlatitude ionosphere is developed for the first time and applied to the Perkins instability in the midlatitude F region. Growth of the Perkins instability is successfully reproduced under nighttime condition, and the numerical results basic...
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Published in | Geophysical research letters Vol. 35; no. 3; pp. L03101 - n/a |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Washington, DC
American Geophysical Union
01.02.2008
Blackwell Publishing Ltd |
Subjects | |
Online Access | Get full text |
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Summary: | A three‐dimensional numerical simulation in the nighttime midlatitude ionosphere is developed for the first time and applied to the Perkins instability in the midlatitude F region. Growth of the Perkins instability is successfully reproduced under nighttime condition, and the numerical results basically agree with a linear theory and previous two‐dimensional numerical studies. Northwest‐southeast (NW‐SE) alignment of density perturbations is generated from random seeding by applying a southeastward neutral wind. The perturbations are dominant at altitudes of 200–300 km where a steep density gradient exists, which is consistent with the altitude of 630‐nm airglow emission that often shows NW‐SE alignment. Further simulation in terms of the E‐F coupling can be done in the near future. |
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Bibliography: | istex:92BA32E01F04C9E0FA524EDC9933D41403F9C76B ArticleID:2007GL032496 ark:/67375/WNG-4QTWSL80-T ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0094-8276 1944-8007 |
DOI: | 10.1029/2007GL032496 |