Seasonal and Latitudinal Variations of the F2-Layer during Magnetic Storms
To identify seasonal and latitudinal variations of F2 layer during magnetic storm, we examine the change of daily averages of foF2 observed at Kokubunji and Hobart during high (2000~2002) and low (2006~2008) solar activity intervals. It is found that geomagnetic activity has a different effect on...
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| Format: | Article |
| Language: | English |
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The Korean Space Science Society
2013-12-01
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| Series: | Journal of Astronomy and Space Sciences |
| Subjects: | |
| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2013/v30n4/OJOOBS_2013_v30n4_231.pdf |
| _version_ | 1797370231573708800 |
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| author | Yoon-Kyung Park Young-Sil Kwak Byung-Ho Ahn |
| author_facet | Yoon-Kyung Park Young-Sil Kwak Byung-Ho Ahn |
| author_sort | Yoon-Kyung Park |
| collection | DOAJ |
| description | To identify seasonal and latitudinal variations of F2 layer during magnetic storm, we examine the change of daily averages
of foF2 observed at Kokubunji and Hobart during high (2000~2002) and low (2006~2008) solar activity intervals. It is found
that geomagnetic activity has a different effect on the ionospheric F2-layer electron density variation for different seasons
and different latitudes. We, thus, investigate how the change of geomagnetic activity affects the ionospheric F2-layer electron
density with season and latitude. For this purpose, two magnetic storms occurred in equinox (31 March 2001) and solstice
(20 November 2003) seasons are selected. Then we investigate foF2, which are observed at Kokubunji, Townsville, Brisbane,
Canberra and Hobart, Dst index, Ap index, and AE index for the two magnetic storm periods. These observatories have similar
geomagnetic longitude, but have different latitude. Furthermore, we investigate the relation between the foF2 and the [O]/[N2]
ratio and TEC variations during 19-22 November 2003 magnetic storm period. As a result, we find that the latitudinal variations
of [O]/[N2] ratio and TEC are closely related with the latitudinal variation of foF2. Therefore, we conclude that the seasonal and
latitudinal variations of foF2 during magnetic storm are caused by the seasonal and latitudinal variations of mean meridional
circulation of the thermosphere, particularly upwelling and downwelling of neutral atmosphere during magnetic storm. |
| first_indexed | 2024-03-08T17:58:23Z |
| format | Article |
| id | doaj.art-84a1d34c74dd4b7183092409487abe40 |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T17:58:23Z |
| publishDate | 2013-12-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-84a1d34c74dd4b7183092409487abe402024-01-02T03:13:38ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14092013-12-0130423123910.5140/JASS.2013.30.4.231Seasonal and Latitudinal Variations of the F2-Layer during Magnetic StormsYoon-Kyung Park0Young-Sil Kwak1Byung-Ho Ahn2Daegu Girls' High School, Daegu 706-824, KoreaKorea Astronomy and Space Science Institute, Daejeon 305-348, KoreaDepartment of Earth Science Education, Kyungpook National University, Daegu 702-701, KoreaTo identify seasonal and latitudinal variations of F2 layer during magnetic storm, we examine the change of daily averages of foF2 observed at Kokubunji and Hobart during high (2000~2002) and low (2006~2008) solar activity intervals. It is found that geomagnetic activity has a different effect on the ionospheric F2-layer electron density variation for different seasons and different latitudes. We, thus, investigate how the change of geomagnetic activity affects the ionospheric F2-layer electron density with season and latitude. For this purpose, two magnetic storms occurred in equinox (31 March 2001) and solstice (20 November 2003) seasons are selected. Then we investigate foF2, which are observed at Kokubunji, Townsville, Brisbane, Canberra and Hobart, Dst index, Ap index, and AE index for the two magnetic storm periods. These observatories have similar geomagnetic longitude, but have different latitude. Furthermore, we investigate the relation between the foF2 and the [O]/[N2] ratio and TEC variations during 19-22 November 2003 magnetic storm period. As a result, we find that the latitudinal variations of [O]/[N2] ratio and TEC are closely related with the latitudinal variation of foF2. Therefore, we conclude that the seasonal and latitudinal variations of foF2 during magnetic storm are caused by the seasonal and latitudinal variations of mean meridional circulation of the thermosphere, particularly upwelling and downwelling of neutral atmosphere during magnetic storm.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2013/v30n4/OJOOBS_2013_v30n4_231.pdfmagnetic stormseasonal and latitudinal variation of foF2[O]/[N2] ratioTEC |
| spellingShingle | Yoon-Kyung Park Young-Sil Kwak Byung-Ho Ahn Seasonal and Latitudinal Variations of the F2-Layer during Magnetic Storms Journal of Astronomy and Space Sciences magnetic storm seasonal and latitudinal variation of foF2 [O]/[N2] ratio TEC |
| title | Seasonal and Latitudinal Variations of the F2-Layer during Magnetic Storms |
| title_full | Seasonal and Latitudinal Variations of the F2-Layer during Magnetic Storms |
| title_fullStr | Seasonal and Latitudinal Variations of the F2-Layer during Magnetic Storms |
| title_full_unstemmed | Seasonal and Latitudinal Variations of the F2-Layer during Magnetic Storms |
| title_short | Seasonal and Latitudinal Variations of the F2-Layer during Magnetic Storms |
| title_sort | seasonal and latitudinal variations of the f2 layer during magnetic storms |
| topic | magnetic storm seasonal and latitudinal variation of foF2 [O]/[N2] ratio TEC |
| url | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2013/v30n4/OJOOBS_2013_v30n4_231.pdf |
| work_keys_str_mv | AT yoonkyungpark seasonalandlatitudinalvariationsofthef2layerduringmagneticstorms AT youngsilkwak seasonalandlatitudinalvariationsofthef2layerduringmagneticstorms AT byunghoahn seasonalandlatitudinalvariationsofthef2layerduringmagneticstorms |