Three-dimensional MHD simulation of interplanetary magnetic field changes at 1 AU as a consequence of simulated solar flares
A fully three-dimensional (3D), time-dependent, MHD interplanetary global model (3D IGM) has been used, for the first time, to study the relationship between different forms of solar activity and transient variations of the north-south component, <i>B<sub>z</sub></i>, of...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
1996-04-01
|
| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/14/383/1996/angeo-14-383-1996.pdf |
| _version_ | 1819142475886886912 |
|---|---|
| author | C.-C. Wu M. Dryer S. T. Wu |
| author_facet | C.-C. Wu M. Dryer S. T. Wu |
| author_sort | C.-C. Wu |
| collection | DOAJ |
| description | A fully three-dimensional (3D),
time-dependent, MHD interplanetary global model (3D IGM) has been used, for the
first time, to study the relationship between different forms of solar activity
and transient variations of the north-south component, <i>B<sub>z</sub></i>, of
the interplanetary magnetic field (IMF) at 1 AU. One form of solar activity, the
flare, is simulated by using a pressure pulse at different locations near the
solar surface and observing the simulated IMF evolution of <i>B</i><sub>θ</sub>
(=–<i>B<sub>z</sub></i>) at 1 AU. Results show that, for a given pressure pulse,
the orientation of the corresponding transient variation of <i>B<sub>z</sub></i>
has a strong relationship to the location of the pressure pulse and the initial
conditions of the IMF. Two initial IMF conditions are considered: a unipolar
Archimedean spiral with outward polarity and a flat heliospheric current sheet (HCS)
with outward polarity in the northern hemisphere and which gradually reverses
polarity in the solar equatorial plane to inward polarity in the southern
heliospheric hemisphere. The wave guide effect of the HCS is also demonstrated. |
| first_indexed | 2024-12-22T12:10:57Z |
| format | Article |
| id | doaj.art-9cc91ff745ea48cc889b290cc0c6955b |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-22T12:10:57Z |
| publishDate | 1996-04-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-9cc91ff745ea48cc889b290cc0c6955b2022-12-21T18:26:18ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05761996-04-011438339910.1007/s00585-996-0383-1Three-dimensional MHD simulation of interplanetary magnetic field changes at 1 AU as a consequence of simulated solar flaresC.-C. WuM. DryerS. T. WuA fully three-dimensional (3D), time-dependent, MHD interplanetary global model (3D IGM) has been used, for the first time, to study the relationship between different forms of solar activity and transient variations of the north-south component, <i>B<sub>z</sub></i>, of the interplanetary magnetic field (IMF) at 1 AU. One form of solar activity, the flare, is simulated by using a pressure pulse at different locations near the solar surface and observing the simulated IMF evolution of <i>B</i><sub>θ</sub> (=–<i>B<sub>z</sub></i>) at 1 AU. Results show that, for a given pressure pulse, the orientation of the corresponding transient variation of <i>B<sub>z</sub></i> has a strong relationship to the location of the pressure pulse and the initial conditions of the IMF. Two initial IMF conditions are considered: a unipolar Archimedean spiral with outward polarity and a flat heliospheric current sheet (HCS) with outward polarity in the northern hemisphere and which gradually reverses polarity in the solar equatorial plane to inward polarity in the southern heliospheric hemisphere. The wave guide effect of the HCS is also demonstrated.https://www.ann-geophys.net/14/383/1996/angeo-14-383-1996.pdf |
| spellingShingle | C.-C. Wu M. Dryer S. T. Wu Three-dimensional MHD simulation of interplanetary magnetic field changes at 1 AU as a consequence of simulated solar flares Annales Geophysicae |
| title | Three-dimensional MHD simulation of interplanetary magnetic field changes at 1 AU as a consequence of simulated solar flares |
| title_full | Three-dimensional MHD simulation of interplanetary magnetic field changes at 1 AU as a consequence of simulated solar flares |
| title_fullStr | Three-dimensional MHD simulation of interplanetary magnetic field changes at 1 AU as a consequence of simulated solar flares |
| title_full_unstemmed | Three-dimensional MHD simulation of interplanetary magnetic field changes at 1 AU as a consequence of simulated solar flares |
| title_short | Three-dimensional MHD simulation of interplanetary magnetic field changes at 1 AU as a consequence of simulated solar flares |
| title_sort | three dimensional mhd simulation of interplanetary magnetic field changes at 1 au as a consequence of simulated solar flares |
| url | https://www.ann-geophys.net/14/383/1996/angeo-14-383-1996.pdf |
| work_keys_str_mv | AT ccwu threedimensionalmhdsimulationofinterplanetarymagneticfieldchangesat1auasaconsequenceofsimulatedsolarflares AT mdryer threedimensionalmhdsimulationofinterplanetarymagneticfieldchangesat1auasaconsequenceofsimulatedsolarflares AT stwu threedimensionalmhdsimulationofinterplanetarymagneticfieldchangesat1auasaconsequenceofsimulatedsolarflares |