Dynamical evolution of the inner heliosphere approaching solar activity maximum: interpreting Ulysses observations using a global MHD model
In this study we describe a series of MHD simulations covering the time period from 12 January 1999 to 19 September 2001 (Carrington Rotation 1945 to 1980). This interval coincided with: (1) the Sun’s approach toward solar maximum; and (2) Ulysses’ second descent to the southern polar region...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2003-06-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/21/1347/2003/angeo-21-1347-2003.pdf |
| _version_ | 1818555607277371392 |
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| author | P. Riley Z. Mikić J. A. Linker |
| author_facet | P. Riley Z. Mikić J. A. Linker |
| author_sort | P. Riley |
| collection | DOAJ |
| description | In this study we describe
a series of MHD simulations covering the time period from 12 January 1999 to 19
September 2001 (Carrington Rotation 1945 to 1980). This interval coincided
with: (1) the Sun’s approach toward solar maximum; and (2) Ulysses’ second
descent to the southern polar regions, rapid latitude scan, and arrival into
the northern polar regions. We focus on the evolution of several key parameters
during this time, including the photospheric magnetic field, the computed
coronal hole boundaries, the computed velocity profile near the Sun, and the
plasma and magnetic field parameters at the location of Ulysses. The model
results provide a global context for interpreting the often complex in situ
measurements. We also present a heuristic explanation of stream dynamics to
describe the morphology of interaction regions at solar maximum and contrast it
with the picture that resulted from Ulysses’ first orbit, which occurred
during more quiescent solar conditions. The simulation results described here
are available at: http://sun.saic.com.<br><br><b>Key words. </b>Interplanetary physics
(Interplanetary magnetic fields; solar wind plasma; sources of the solar wind) |
| first_indexed | 2024-12-12T09:55:56Z |
| format | Article |
| id | doaj.art-65bbe1b069f04c5e8b5cc2dd0c036491 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-12T09:55:56Z |
| publishDate | 2003-06-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-65bbe1b069f04c5e8b5cc2dd0c0364912022-12-22T00:28:08ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762003-06-01211347135710.5194/angeo-21-1347-2003Dynamical evolution of the inner heliosphere approaching solar activity maximum: interpreting Ulysses observations using a global MHD modelP. Riley0Z. Mikić1J. A. Linker2Science Applications International Corporation, 10260 Campus Point Dr., San Diego, CA 92121, USAScience Applications International Corporation, 10260 Campus Point Dr., San Diego, CA 92121, USAScience Applications International Corporation, 10260 Campus Point Dr., San Diego, CA 92121, USAIn this study we describe a series of MHD simulations covering the time period from 12 January 1999 to 19 September 2001 (Carrington Rotation 1945 to 1980). This interval coincided with: (1) the Sun’s approach toward solar maximum; and (2) Ulysses’ second descent to the southern polar regions, rapid latitude scan, and arrival into the northern polar regions. We focus on the evolution of several key parameters during this time, including the photospheric magnetic field, the computed coronal hole boundaries, the computed velocity profile near the Sun, and the plasma and magnetic field parameters at the location of Ulysses. The model results provide a global context for interpreting the often complex in situ measurements. We also present a heuristic explanation of stream dynamics to describe the morphology of interaction regions at solar maximum and contrast it with the picture that resulted from Ulysses’ first orbit, which occurred during more quiescent solar conditions. The simulation results described here are available at: http://sun.saic.com.<br><br><b>Key words. </b>Interplanetary physics (Interplanetary magnetic fields; solar wind plasma; sources of the solar wind)https://www.ann-geophys.net/21/1347/2003/angeo-21-1347-2003.pdf |
| spellingShingle | P. Riley Z. Mikić J. A. Linker Dynamical evolution of the inner heliosphere approaching solar activity maximum: interpreting Ulysses observations using a global MHD model Annales Geophysicae |
| title | Dynamical evolution of the inner heliosphere approaching solar activity maximum: interpreting Ulysses observations using a global MHD model |
| title_full | Dynamical evolution of the inner heliosphere approaching solar activity maximum: interpreting Ulysses observations using a global MHD model |
| title_fullStr | Dynamical evolution of the inner heliosphere approaching solar activity maximum: interpreting Ulysses observations using a global MHD model |
| title_full_unstemmed | Dynamical evolution of the inner heliosphere approaching solar activity maximum: interpreting Ulysses observations using a global MHD model |
| title_short | Dynamical evolution of the inner heliosphere approaching solar activity maximum: interpreting Ulysses observations using a global MHD model |
| title_sort | dynamical evolution of the inner heliosphere approaching solar activity maximum interpreting ulysses observations using a global mhd model |
| url | https://www.ann-geophys.net/21/1347/2003/angeo-21-1347-2003.pdf |
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