How did the solar wind structure change around the solar maximum? From interplanetary scintillation observation
Observations from the second Ulysses fast latitude scan show that the global structure of solar wind near solar maximum is much more complex than at solar minimum. Soon after solar maximum, Ulysses observed a polar coronal hole (high speed) plasma with magnetic polarity of the new solar cycle in the...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00035417 2023-05-15T17:39:54+02:00 How did the solar wind structure change around the solar maximum? From interplanetary scintillation observation Fujiki, K. Kojima, M. Tokumaru, M. Ohmi, T. Yokobe, A. Hayashi, K. McComas, D. J. Elliott, H. A. 2003-06 electronic https://doi.org/10.5194/angeo-21-1257-2003 https://noa.gwlb.de/receive/cop_mods_00035417 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00035371/angeo-21-1257-2003.pdf https://angeo.copernicus.org/articles/21/1257/2003/angeo-21-1257-2003.pdf eng eng Copernicus Publications Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-21-1257-2003 https://noa.gwlb.de/receive/cop_mods_00035417 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00035371/angeo-21-1257-2003.pdf https://angeo.copernicus.org/articles/21/1257/2003/angeo-21-1257-2003.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2003 ftnonlinearchiv https://doi.org/10.5194/angeo-21-1257-2003 2022-02-08T22:44:37Z Observations from the second Ulysses fast latitude scan show that the global structure of solar wind near solar maximum is much more complex than at solar minimum. Soon after solar maximum, Ulysses observed a polar coronal hole (high speed) plasma with magnetic polarity of the new solar cycle in the Northern Hemisphere. We analyze the solar wind structure at and near solar maximum using interplanetary scintillation (IPS) measurements. To do this, we have developed a new tomographic technique, which improves our ability to examine the complex structure of the solar wind at solar maximum. Our IPS results show that in 1999 and 2000 the total area with speed greater than 700 km s-1 is significantly reduced first in the Northern Hemisphere and then in the Southern Hemisphere. For year 2001, we find that the formation of large areas of fast solar wind around the north pole precedes the formation of large polar coronal holes around the southern pole by several months. The IPS observations show a high level agreement to the Ulysses observation, particularly in coronal holes. Key words. Interplanetary physics (solar wind plasma) – Radio science (remote sensing) Article in Journal/Newspaper North Pole Niedersächsisches Online-Archiv NOA North Pole Annales Geophysicae 21 6 1257 1261 |
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article Verlagsveröffentlichung Fujiki, K. Kojima, M. Tokumaru, M. Ohmi, T. Yokobe, A. Hayashi, K. McComas, D. J. Elliott, H. A. How did the solar wind structure change around the solar maximum? From interplanetary scintillation observation |
topic_facet |
article Verlagsveröffentlichung |
description |
Observations from the second Ulysses fast latitude scan show that the global structure of solar wind near solar maximum is much more complex than at solar minimum. Soon after solar maximum, Ulysses observed a polar coronal hole (high speed) plasma with magnetic polarity of the new solar cycle in the Northern Hemisphere. We analyze the solar wind structure at and near solar maximum using interplanetary scintillation (IPS) measurements. To do this, we have developed a new tomographic technique, which improves our ability to examine the complex structure of the solar wind at solar maximum. Our IPS results show that in 1999 and 2000 the total area with speed greater than 700 km s-1 is significantly reduced first in the Northern Hemisphere and then in the Southern Hemisphere. For year 2001, we find that the formation of large areas of fast solar wind around the north pole precedes the formation of large polar coronal holes around the southern pole by several months. The IPS observations show a high level agreement to the Ulysses observation, particularly in coronal holes. Key words. Interplanetary physics (solar wind plasma) – Radio science (remote sensing) |
format |
Article in Journal/Newspaper |
author |
Fujiki, K. Kojima, M. Tokumaru, M. Ohmi, T. Yokobe, A. Hayashi, K. McComas, D. J. Elliott, H. A. |
author_facet |
Fujiki, K. Kojima, M. Tokumaru, M. Ohmi, T. Yokobe, A. Hayashi, K. McComas, D. J. Elliott, H. A. |
author_sort |
Fujiki, K. |
title |
How did the solar wind structure change around the solar maximum? From interplanetary scintillation observation |
title_short |
How did the solar wind structure change around the solar maximum? From interplanetary scintillation observation |
title_full |
How did the solar wind structure change around the solar maximum? From interplanetary scintillation observation |
title_fullStr |
How did the solar wind structure change around the solar maximum? From interplanetary scintillation observation |
title_full_unstemmed |
How did the solar wind structure change around the solar maximum? From interplanetary scintillation observation |
title_sort |
how did the solar wind structure change around the solar maximum? from interplanetary scintillation observation |
publisher |
Copernicus Publications |
publishDate |
2003 |
url |
https://doi.org/10.5194/angeo-21-1257-2003 https://noa.gwlb.de/receive/cop_mods_00035417 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00035371/angeo-21-1257-2003.pdf https://angeo.copernicus.org/articles/21/1257/2003/angeo-21-1257-2003.pdf |
geographic |
North Pole |
geographic_facet |
North Pole |
genre |
North Pole |
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North Pole |
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Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-21-1257-2003 https://noa.gwlb.de/receive/cop_mods_00035417 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00035371/angeo-21-1257-2003.pdf https://angeo.copernicus.org/articles/21/1257/2003/angeo-21-1257-2003.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/angeo-21-1257-2003 |
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Annales Geophysicae |
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21 |
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6 |
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1257 |
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