Multi-instrument study of longitudinal wave structures for plasma bubble seeding in the equatorial ionosphere
Large Scale Wave Structures (LSWS) in the equatorial ionospheric F-region were observed by measuring spatial and temporal variations within detrended total electron content (dTEC) data obtained by ground-based GNSS receivers over the South American continent. By using dTEC-maps, we have been able to...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Science Press
2021-09-01
|
| Series: | Earth and Planetary Physics |
| Subjects: | |
| Online Access: | http://www.eppcgs.org/article/doi/10.26464/epp2021047?pageType=en |
| _version_ | 1811296522729422848 |
|---|---|
| author | H. Takahashi P. Essien C. A. O. B. Figueiredo C. M. Wrasse D. Barros M. A. Abdu Y. Otsuka K. Shiokawa GuoZhu Li |
| author_facet | H. Takahashi P. Essien C. A. O. B. Figueiredo C. M. Wrasse D. Barros M. A. Abdu Y. Otsuka K. Shiokawa GuoZhu Li |
| author_sort | H. Takahashi |
| collection | DOAJ |
| description | Large Scale Wave Structures (LSWS) in the equatorial ionospheric F-region were observed by measuring spatial and temporal variations within detrended total electron content (dTEC) data obtained by ground-based GNSS receivers over the South American continent. By using dTEC-maps, we have been able to produce, for the first-time, two-dimensional representations of LSWS. During the period from September to December, the LSWS frequently occurred starting a few hours prior to Equatorial Plasma Bubble (EPB) development. From 17 events of LSWS observed in 2014 and 2015, wave characteristics were obtained: the observed wavelengths, periods, and the phase speeds are respectively, ~900 km, ~41 min and ~399 m/s; the waves propagated from the northeast to southeast. In some cases the front of the oscillation was meridionally aligned, extending to more than 1600 km, the first time such large extension of the wavefront has been reported. From F-layer bottom height oscillation data, measured by ionosonde, LSWS exhibit two different vertical phase propagation modes, in-phase and downward phase. The former mode indicates the presence of a polarization electric field in the F-layer bottom side; the latter suggests propagation of atmospheric gravity waves. The presence of LSWS near the solar terminator, followed by the development of EPBs, suggests that the upwelling of the F-layer bottom height produces a condition favorable to the development of Rayleigh–Taylor instability. |
| first_indexed | 2024-04-13T05:50:41Z |
| format | Article |
| id | doaj.art-bdd709c0f3d5421195c82edc0f7110d8 |
| institution | Directory Open Access Journal |
| issn | 2096-3955 |
| language | English |
| last_indexed | 2024-04-13T05:50:41Z |
| publishDate | 2021-09-01 |
| publisher | Science Press |
| record_format | Article |
| series | Earth and Planetary Physics |
| spelling | doaj.art-bdd709c0f3d5421195c82edc0f7110d82022-12-22T02:59:48ZengScience PressEarth and Planetary Physics2096-39552021-09-015536837710.26464/epp2021047S14257-HTakahashi-FMulti-instrument study of longitudinal wave structures for plasma bubble seeding in the equatorial ionosphereH. Takahashi0P. Essien1C. A. O. B. Figueiredo2C. M. Wrasse3D. Barros4M. A. Abdu5Y. Otsuka6K. Shiokawa7GuoZhu Li8Instituto Nacional de Pesquisas Espaciais, São José dos Campos, BrazilInstituto Nacional de Pesquisas Espaciais, São José dos Campos, BrazilInstituto Nacional de Pesquisas Espaciais, São José dos Campos, BrazilInstituto Nacional de Pesquisas Espaciais, São José dos Campos, BrazilInstituto Nacional de Pesquisas Espaciais, São José dos Campos, BrazilInstituto Nacional de Pesquisas Espaciais, São José dos Campos, BrazilInstitute for Space-Earth Environmental Research, Nagoya University, Nagoya, JapanInstitute for Space-Earth Environmental Research, Nagoya University, Nagoya, JapanInstitute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaLarge Scale Wave Structures (LSWS) in the equatorial ionospheric F-region were observed by measuring spatial and temporal variations within detrended total electron content (dTEC) data obtained by ground-based GNSS receivers over the South American continent. By using dTEC-maps, we have been able to produce, for the first-time, two-dimensional representations of LSWS. During the period from September to December, the LSWS frequently occurred starting a few hours prior to Equatorial Plasma Bubble (EPB) development. From 17 events of LSWS observed in 2014 and 2015, wave characteristics were obtained: the observed wavelengths, periods, and the phase speeds are respectively, ~900 km, ~41 min and ~399 m/s; the waves propagated from the northeast to southeast. In some cases the front of the oscillation was meridionally aligned, extending to more than 1600 km, the first time such large extension of the wavefront has been reported. From F-layer bottom height oscillation data, measured by ionosonde, LSWS exhibit two different vertical phase propagation modes, in-phase and downward phase. The former mode indicates the presence of a polarization electric field in the F-layer bottom side; the latter suggests propagation of atmospheric gravity waves. The presence of LSWS near the solar terminator, followed by the development of EPBs, suggests that the upwelling of the F-layer bottom height produces a condition favorable to the development of Rayleigh–Taylor instability.http://www.eppcgs.org/article/doi/10.26464/epp2021047?pageType=enionosphereequatorial plasma bubblelswstec |
| spellingShingle | H. Takahashi P. Essien C. A. O. B. Figueiredo C. M. Wrasse D. Barros M. A. Abdu Y. Otsuka K. Shiokawa GuoZhu Li Multi-instrument study of longitudinal wave structures for plasma bubble seeding in the equatorial ionosphere Earth and Planetary Physics ionosphere equatorial plasma bubble lsws tec |
| title | Multi-instrument study of longitudinal wave structures for plasma bubble seeding in the equatorial ionosphere |
| title_full | Multi-instrument study of longitudinal wave structures for plasma bubble seeding in the equatorial ionosphere |
| title_fullStr | Multi-instrument study of longitudinal wave structures for plasma bubble seeding in the equatorial ionosphere |
| title_full_unstemmed | Multi-instrument study of longitudinal wave structures for plasma bubble seeding in the equatorial ionosphere |
| title_short | Multi-instrument study of longitudinal wave structures for plasma bubble seeding in the equatorial ionosphere |
| title_sort | multi instrument study of longitudinal wave structures for plasma bubble seeding in the equatorial ionosphere |
| topic | ionosphere equatorial plasma bubble lsws tec |
| url | http://www.eppcgs.org/article/doi/10.26464/epp2021047?pageType=en |
| work_keys_str_mv | AT htakahashi multiinstrumentstudyoflongitudinalwavestructuresforplasmabubbleseedingintheequatorialionosphere AT pessien multiinstrumentstudyoflongitudinalwavestructuresforplasmabubbleseedingintheequatorialionosphere AT caobfigueiredo multiinstrumentstudyoflongitudinalwavestructuresforplasmabubbleseedingintheequatorialionosphere AT cmwrasse multiinstrumentstudyoflongitudinalwavestructuresforplasmabubbleseedingintheequatorialionosphere AT dbarros multiinstrumentstudyoflongitudinalwavestructuresforplasmabubbleseedingintheequatorialionosphere AT maabdu multiinstrumentstudyoflongitudinalwavestructuresforplasmabubbleseedingintheequatorialionosphere AT yotsuka multiinstrumentstudyoflongitudinalwavestructuresforplasmabubbleseedingintheequatorialionosphere AT kshiokawa multiinstrumentstudyoflongitudinalwavestructuresforplasmabubbleseedingintheequatorialionosphere AT guozhuli multiinstrumentstudyoflongitudinalwavestructuresforplasmabubbleseedingintheequatorialionosphere |