The polar ionosphere at Zhongshan Station on May 11, 1999, the day the solar wind almost disappeared
The solar wind almost disappeared on May 11,1999: the solar wind plasma density and' dynamic pressure were less than 1 cm(-3) and 0.1 nPa respectively, while the interplanetary magnetic field was northward. The polar ionospheric data observed by the multi-instruments at Zhongshan Station in Ant...
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2002
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:38742 2023-05-15T13:32:22+02:00 The polar ionosphere at Zhongshan Station on May 11, 1999, the day the solar wind almost disappeared Hu, H. Q. Liu, R. Y. Liu, Y. H. Yang, H. G. Liu, S. L. Zhang, B. C. Yong, A. Sato, N. Fraser, B. J. 2002-01-01 https://espace.library.uq.edu.au/view/UQ:38742 eng eng Chinese Academy of Sciences doi:10.1007/BF02889698 issn:0253-5831 Mathematics Applied Solar Wind Antarctica Zhongshan Station Polar Ionosphere Geomagnetic Pulsation Magnetosphere 02 Physical Sciences Journal Article 2002 ftunivqespace https://doi.org/10.1007/BF02889698 2020-08-03T23:46:34Z The solar wind almost disappeared on May 11,1999: the solar wind plasma density and' dynamic pressure were less than 1 cm(-3) and 0.1 nPa respectively, while the interplanetary magnetic field was northward. The polar ionospheric data observed by the multi-instruments at Zhongshan Station in Antarctica on such special event day was compared with those of the control day (May 14). It was shown that geomagnetic activity was very quiet on May 11 at Zhongshan. The magnetic pulsation, which usually occurred at about magnetic noon, did not appear. The ionosphere was steady and stratified, and the F-2 layer spread very little. The critical frequency of dayside F-2 layer, f(0)F(2), was larger than that of control day, and the peak of f(0)F(2) appeared 2 hours earlier. The ionospheric drift velocity was less than usual. There were intensive auroral E-s appearing at magnetic noon. All this indicates that the polar ionosphere was extremely quiet and geomagnetic field was much more dipolar on May 11. There were some signatures of auroral substorm before midnight, such as the negative deviation of the geomagnetic H component, accompanied with auroral E-s and weak Pc3 pulsation. Article in Journal/Newspaper Antarc* Antarctica The University of Queensland: UQ eSpace Zhongshan ENVELOPE(76.371,76.371,-69.373,-69.373) Zhongshan Station ENVELOPE(76.371,76.371,-69.373,-69.373) Science in China Series A: Mathematics 45 S1 161 166 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Mathematics Applied Solar Wind Antarctica Zhongshan Station Polar Ionosphere Geomagnetic Pulsation Magnetosphere 02 Physical Sciences |
spellingShingle |
Mathematics Applied Solar Wind Antarctica Zhongshan Station Polar Ionosphere Geomagnetic Pulsation Magnetosphere 02 Physical Sciences Hu, H. Q. Liu, R. Y. Liu, Y. H. Yang, H. G. Liu, S. L. Zhang, B. C. Yong, A. Sato, N. Fraser, B. J. The polar ionosphere at Zhongshan Station on May 11, 1999, the day the solar wind almost disappeared |
topic_facet |
Mathematics Applied Solar Wind Antarctica Zhongshan Station Polar Ionosphere Geomagnetic Pulsation Magnetosphere 02 Physical Sciences |
description |
The solar wind almost disappeared on May 11,1999: the solar wind plasma density and' dynamic pressure were less than 1 cm(-3) and 0.1 nPa respectively, while the interplanetary magnetic field was northward. The polar ionospheric data observed by the multi-instruments at Zhongshan Station in Antarctica on such special event day was compared with those of the control day (May 14). It was shown that geomagnetic activity was very quiet on May 11 at Zhongshan. The magnetic pulsation, which usually occurred at about magnetic noon, did not appear. The ionosphere was steady and stratified, and the F-2 layer spread very little. The critical frequency of dayside F-2 layer, f(0)F(2), was larger than that of control day, and the peak of f(0)F(2) appeared 2 hours earlier. The ionospheric drift velocity was less than usual. There were intensive auroral E-s appearing at magnetic noon. All this indicates that the polar ionosphere was extremely quiet and geomagnetic field was much more dipolar on May 11. There were some signatures of auroral substorm before midnight, such as the negative deviation of the geomagnetic H component, accompanied with auroral E-s and weak Pc3 pulsation. |
format |
Article in Journal/Newspaper |
author |
Hu, H. Q. Liu, R. Y. Liu, Y. H. Yang, H. G. Liu, S. L. Zhang, B. C. Yong, A. Sato, N. Fraser, B. J. |
author_facet |
Hu, H. Q. Liu, R. Y. Liu, Y. H. Yang, H. G. Liu, S. L. Zhang, B. C. Yong, A. Sato, N. Fraser, B. J. |
author_sort |
Hu, H. Q. |
title |
The polar ionosphere at Zhongshan Station on May 11, 1999, the day the solar wind almost disappeared |
title_short |
The polar ionosphere at Zhongshan Station on May 11, 1999, the day the solar wind almost disappeared |
title_full |
The polar ionosphere at Zhongshan Station on May 11, 1999, the day the solar wind almost disappeared |
title_fullStr |
The polar ionosphere at Zhongshan Station on May 11, 1999, the day the solar wind almost disappeared |
title_full_unstemmed |
The polar ionosphere at Zhongshan Station on May 11, 1999, the day the solar wind almost disappeared |
title_sort |
polar ionosphere at zhongshan station on may 11, 1999, the day the solar wind almost disappeared |
publisher |
Chinese Academy of Sciences |
publishDate |
2002 |
url |
https://espace.library.uq.edu.au/view/UQ:38742 |
long_lat |
ENVELOPE(76.371,76.371,-69.373,-69.373) ENVELOPE(76.371,76.371,-69.373,-69.373) |
geographic |
Zhongshan Zhongshan Station |
geographic_facet |
Zhongshan Zhongshan Station |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
doi:10.1007/BF02889698 issn:0253-5831 |
op_doi |
https://doi.org/10.1007/BF02889698 |
container_title |
Science in China Series A: Mathematics |
container_volume |
45 |
container_issue |
S1 |
container_start_page |
161 |
op_container_end_page |
166 |
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1766026216314241024 |