| Автор | Basu, Sunanda |
| Автор | Basu, Santimay |
| Автор | Senior, C. |
| Автор | Weimer, D. |
| Автор | Nielsen, E. |
| Автор | Fougere, P. F. |
| Дата выпуска | 1986 |
| dc.description | Preliminary results are presented on the nature of a distinct class of sub‐km high latitude irregularities which can create localized regions of near saturated VHF and fairly intense UHF scintillations in the nighttime auroral F‐region. The unique feature of this class of irregularities is that it is associated not with large scale (several tens of km) organized density gradients in the F‐region but with velocity shears with shear gradient scale lengths ∼10km. The presence of velocity shears was established by EISCAT ion drift measurements, continuous STARE measurements of electron drift and the in‐situ ion drift measurements from the HILAT satellite. Analytical and numerical simulation studies of velocity shear driven Kelvin‐Helmholtz type plasma instabilities are necessary to elucidate the generation mechanism of this class of irregularities. |
| Формат | application.pdf |
| Копирайт | Copyright 1986 by the American Geophysical Union. |
| Тема | Ionosphere |
| Тема | Ionosphere: Auroral ionosphere |
| Тема | Ionosphere: Ionosphere‐magnetosphere interactions |
| Тема | Ionosphere: Ionospheric irregularities |
| Тема | Ionosphere: Plasma convection |
| Название | Velocity shears and sub‐km scale irregularities in the nighttime auroral F‐region |
| Тип | article |
| DOI | 10.1029/GL013i002p00101 |
| Electronic ISSN | 1944-8007 |
| Print ISSN | 0094-8276 |
| Журнал | Geophysical Research Letters |
| Том | 13 |
| Первая страница | 101 |
| Последняя страница | 104 |
| Аффилиация | Basu, Sunanda; Emmanuel College, Boston MA 02115 |
| Аффилиация | Basu, Santimay; Air Force Geophysics Laboratory, Hanscom AFB MA 01731 |
| Аффилиация | Senior, C.; Centre de Recherches en Physique de l'Environnement, 94107 Saint‐Maur‐des‐Fossés, France |
| Аффилиация | Weimer, D.; Regis College Research Center, Weston MA 02193 |
| Аффилиация | Nielsen, E.; Max‐Planck‐Institut Für Aeronomie, D‐3411 Katlenburg‐Lindau, Federal Republic of Germany |
| Аффилиация | Fougere, P. F.; Air Force Geophysics Laboratory, Hanscom AFB MA 01731 |
| Выпуск | 2 |
| Библиографическая ссылка | Basu, Su.S.BasuE.MacKenzieW. R.ColeyW. B.HansonC. S.Lin, F‐region electron density irregularity spectra near auroral acceleration and shear regions, J. Geophys. Res., 89, 5554, 1984 |
| Библиографическая ссылка | Fremouw, E. J.J. M.Lansinger, Continued geophysical analysis of coherent satellite scintillation data, Annual Report, Physical Dynamics Inc., Bellevue WA 98009, 1979 |
| Библиографическая ссылка | Kelley, M. C.P. M.Kintner, Evidence for two‐dimensional inertial turbulence in a cosmic‐scale low‐3 plasma, Astrophys. J., 220, 339, 1978 |
| Библиографическая ссылка | Keskinen, M. J.S. L.Ossakow, Theories of high‐latitude ionospheric irregularities: a review, Radio Sci., 18, 1077, 1983 |
| Библиографическая ссылка | Johns Hopkins APL Technical Digest5, #2, JHU/APL, Laurel MD, 20707, 1984 |
| Библиографическая ссылка | Nielsen, E.R. A.Greenwald, Electron flow and visual aurora at the Harang discontinuity, J. Geophys. Res., 84, 4189, 1979 |
| Библиографическая ссылка | Rino, C. L.R. C.LivingstonS. J.Matthews, Evidence for sheet‐like auroral ionospheric irregularities, Geophys. Res. Lett., 5, 1039, 1978 |
| Библиографическая ссылка | Vickrey, J. F.C. L.RinoT. A.Potemra, Chatanika/TRIAD observations of unstable ionization enhancements in the auroral F‐region, Geophys. Res. Lett., 7, 789, 1980 |
| Библиографическая ссылка | Vickrey, J. F.M. C.Kelley, The effects of a conducting e layer on classical f‐region cross‐field plasma diffusion, J. Geophys. Res., 87, 4461, 1982 |
