Negative phases at South-American stations during magnetic storms
Ionospheric data at three South-American stations (in low, mid and high latitudes) show negative phases in the high latitude location during magnetic storms. The negative phases in foF2 are caused by changes in the ratio between atomic and molecular concentrations of the neutral atmosphere.We find...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Universidad Nacional Autónoma de México, Instituto de Geofísica
2000-03-01
|
| Series: | Geofísica Internacional |
| Subjects: | |
| Online Access: | http://www.geofisica.unam.mx/unid_apoyo/editorial/publicaciones/investigacion/geofisica_internacional/anteriores/2000/01/pincheira.pdf |
| _version_ | 1827887212333629440 |
|---|---|
| author | P.G. Richards M.A. Abdu X.T. Pincheira I.S. Batista |
| author_facet | P.G. Richards M.A. Abdu X.T. Pincheira I.S. Batista |
| author_sort | P.G. Richards |
| collection | DOAJ |
| description | Ionospheric data at three South-American stations (in low, mid and high latitudes) show negative phases in the high latitude location during magnetic storms. The negative phases in foF2 are caused by changes in the ratio between atomic and molecular concentrations of the neutral atmosphere.We find that at high latitudes the negative phases are well explained by the [O]/[N2] rate changes. As the latitude decreases, as the wind influence on the F2 layer peak is dominant, the propagation of gravity waves can explain short-lived negative phases. In low latitudes, disturbed thermospheric winds can cause time delays in the normal pattern of foF2, creating alternating positive and negative phases. |
| first_indexed | 2024-03-12T20:14:59Z |
| format | Article |
| id | doaj.art-cfedda143b7d40548e88e790687d10d0 |
| institution | Directory Open Access Journal |
| issn | 0016-7169 |
| language | English |
| last_indexed | 2024-03-12T20:14:59Z |
| publishDate | 2000-03-01 |
| publisher | Universidad Nacional Autónoma de México, Instituto de Geofísica |
| record_format | Article |
| series | Geofísica Internacional |
| spelling | doaj.art-cfedda143b7d40548e88e790687d10d02023-08-02T01:24:33ZengUniversidad Nacional Autónoma de México, Instituto de GeofísicaGeofísica Internacional0016-71692000-03-01391109115Negative phases at South-American stations during magnetic stormsP.G. RichardsM.A. AbduX.T. PincheiraI.S. BatistaIonospheric data at three South-American stations (in low, mid and high latitudes) show negative phases in the high latitude location during magnetic storms. The negative phases in foF2 are caused by changes in the ratio between atomic and molecular concentrations of the neutral atmosphere.We find that at high latitudes the negative phases are well explained by the [O]/[N2] rate changes. As the latitude decreases, as the wind influence on the F2 layer peak is dominant, the propagation of gravity waves can explain short-lived negative phases. In low latitudes, disturbed thermospheric winds can cause time delays in the normal pattern of foF2, creating alternating positive and negative phases.http://www.geofisica.unam.mx/unid_apoyo/editorial/publicaciones/investigacion/geofisica_internacional/anteriores/2000/01/pincheira.pdfIonospheremagnetic stormsnegative phases |
| spellingShingle | P.G. Richards M.A. Abdu X.T. Pincheira I.S. Batista Negative phases at South-American stations during magnetic storms Geofísica Internacional Ionosphere magnetic storms negative phases |
| title | Negative phases at South-American stations during magnetic storms |
| title_full | Negative phases at South-American stations during magnetic storms |
| title_fullStr | Negative phases at South-American stations during magnetic storms |
| title_full_unstemmed | Negative phases at South-American stations during magnetic storms |
| title_short | Negative phases at South-American stations during magnetic storms |
| title_sort | negative phases at south american stations during magnetic storms |
| topic | Ionosphere magnetic storms negative phases |
| url | http://www.geofisica.unam.mx/unid_apoyo/editorial/publicaciones/investigacion/geofisica_internacional/anteriores/2000/01/pincheira.pdf |
| work_keys_str_mv | AT pgrichards negativephasesatsouthamericanstationsduringmagneticstorms AT maabdu negativephasesatsouthamericanstationsduringmagneticstorms AT xtpincheira negativephasesatsouthamericanstationsduringmagneticstorms AT isbatista negativephasesatsouthamericanstationsduringmagneticstorms |