Observations of poleward-propagating large-scale traveling ionospheric disturbances in southern China
We report here on two cases of poleward-propagating large-scale traveling ionospheric disturbances (LSTIDs) in China during a medium-scale storm between 27 May and 1 June 2011. The observations were conducted by making use of the Global Positioning System network and ionosondes in China and Sout...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2013-02-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/31/377/2013/angeo-31-377-2013.pdf |
| _version_ | 1818672054318137344 |
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| author | F. Ding F. Ding W. Wan W. Wan B. Ning B. Ning B. Zhao B. Zhao Q. Li Y. Wang L. Hu L. Hu R. Zhang B. Xiong B. Xiong |
| author_facet | F. Ding F. Ding W. Wan W. Wan B. Ning B. Ning B. Zhao B. Zhao Q. Li Y. Wang L. Hu L. Hu R. Zhang B. Xiong B. Xiong |
| author_sort | F. Ding |
| collection | DOAJ |
| description | We report here on two cases of poleward-propagating large-scale traveling
ionospheric disturbances (LSTIDs) in China during a medium-scale storm
between 27 May and 1 June 2011. The observations were conducted by making use
of the Global Positioning System network and ionosondes in China and
Southeast Asia. One northeastward-propagating LSTID occurred on the morning
of 30 May, while the other was observed during the nighttime of 1 June. Both
poleward-traveling LSTIDs occurred during the storm's recovery phase in
southern China's low-latitude region (geomagnetic latitude ~ 7.3–24° N) and experienced severe dissipation during their
propagation from south to north. Although the initial relative amplitude of
the nighttime LSTID was ~ 60% larger than that of the morning event,
the nighttime event dissipated more quickly than the morning event because of
a strong nighttime enhancement in background total electronic content (TEC)
during storm time, which led to strong ion-drag dissipation during the
evening. The poleward-propagating LSTIDs exhibit a narrower latitudinal
range, a smaller amplitude, and a slightly higher elevation compared with the
equatorward-moving LSTIDs observed in the same region. Given these features,
the poleward-propagating LSTIDs were likely excited by some local source near
southern China. Excitation of secondary LSTIDs during the dissipation of some
primary medium-scale disturbances from the lower atmosphere is a possible
mechanism. |
| first_indexed | 2024-12-17T07:33:48Z |
| format | Article |
| id | doaj.art-cedd4d7139de43e6b48f21234a3a48da |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-17T07:33:48Z |
| publishDate | 2013-02-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-cedd4d7139de43e6b48f21234a3a48da2022-12-21T21:58:24ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762013-02-013137738510.5194/angeo-31-377-2013Observations of poleward-propagating large-scale traveling ionospheric disturbances in southern ChinaF. Ding0F. Ding1W. Wan2W. Wan3B. Ning4B. Ning5B. Zhao6B. Zhao7Q. Li8Y. Wang9L. Hu10L. Hu11R. Zhang12B. Xiong13B. Xiong14CAS Key Laboratory of Ionospheric Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaBeijing National Observatory of Space Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaCAS Key Laboratory of Ionospheric Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaBeijing National Observatory of Space Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaCAS Key Laboratory of Ionospheric Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaBeijing National Observatory of Space Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaCAS Key Laboratory of Ionospheric Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaBeijing National Observatory of Space Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaNational Earthquake Infrastructure Service, Beijing, ChinaNational Center for Space Weather, China Meteorological Administration, Beijing, ChinaCAS Key Laboratory of Ionospheric Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaBeijing National Observatory of Space Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaNational Earthquake Infrastructure Service, Beijing, ChinaCAS Key Laboratory of Ionospheric Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaBeijing National Observatory of Space Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaWe report here on two cases of poleward-propagating large-scale traveling ionospheric disturbances (LSTIDs) in China during a medium-scale storm between 27 May and 1 June 2011. The observations were conducted by making use of the Global Positioning System network and ionosondes in China and Southeast Asia. One northeastward-propagating LSTID occurred on the morning of 30 May, while the other was observed during the nighttime of 1 June. Both poleward-traveling LSTIDs occurred during the storm's recovery phase in southern China's low-latitude region (geomagnetic latitude ~ 7.3–24° N) and experienced severe dissipation during their propagation from south to north. Although the initial relative amplitude of the nighttime LSTID was ~ 60% larger than that of the morning event, the nighttime event dissipated more quickly than the morning event because of a strong nighttime enhancement in background total electronic content (TEC) during storm time, which led to strong ion-drag dissipation during the evening. The poleward-propagating LSTIDs exhibit a narrower latitudinal range, a smaller amplitude, and a slightly higher elevation compared with the equatorward-moving LSTIDs observed in the same region. Given these features, the poleward-propagating LSTIDs were likely excited by some local source near southern China. Excitation of secondary LSTIDs during the dissipation of some primary medium-scale disturbances from the lower atmosphere is a possible mechanism.https://www.ann-geophys.net/31/377/2013/angeo-31-377-2013.pdf |
| spellingShingle | F. Ding F. Ding W. Wan W. Wan B. Ning B. Ning B. Zhao B. Zhao Q. Li Y. Wang L. Hu L. Hu R. Zhang B. Xiong B. Xiong Observations of poleward-propagating large-scale traveling ionospheric disturbances in southern China Annales Geophysicae |
| title | Observations of poleward-propagating large-scale traveling ionospheric disturbances in southern China |
| title_full | Observations of poleward-propagating large-scale traveling ionospheric disturbances in southern China |
| title_fullStr | Observations of poleward-propagating large-scale traveling ionospheric disturbances in southern China |
| title_full_unstemmed | Observations of poleward-propagating large-scale traveling ionospheric disturbances in southern China |
| title_short | Observations of poleward-propagating large-scale traveling ionospheric disturbances in southern China |
| title_sort | observations of poleward propagating large scale traveling ionospheric disturbances in southern china |
| url | https://www.ann-geophys.net/31/377/2013/angeo-31-377-2013.pdf |
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