Browse > Article
http://dx.doi.org/10.5140/JASS.2008.25.1.033

TEC VARIATIONS OVER KOREAN PENINSULA DURING MAGNETIC STORM  

Ji, E.Y. (Dept. of Astronomy and Space Science, Kyung Hee Univ.)
Choi, B.K. (Korea Astronomy and Space Science Institute)
Kim, K.H. (Korea Astronomy and Space Science Institute)
Lee, D.H. (Dept. of Astronomy and Space Science, Kyung Hee Univ.)
Cho, J.H. (Korea Astronomy and Space Science Institute)
Chung, J.K. (Korea Astronomy and Space Science Institute)
Park, J.U. (Korea Astronomy and Space Science Institute)
Publication Information
Journal of Astronomy and Space Sciences / v.25, no.1, 2008 , pp. 33-42 More about this Journal
Abstract
By analyzing the observations from a number of ground- and space-based instruments, including ionosonde, magnetometers, and ACE interplanetary data, we examine the response of the ionospheric TEC over Korea during 2003 magnetic storms. We found that the variation of vertical TEC is correlated with the southward turning of the interplanetary magnetic field $B_z$. It is suggested that the electric fields produced by the dynamo process in the high-latitude region and the prompt penetration in the low- latitude region are responsible for TEC increases. During the June 16 event, dayside TEC values increase more than 15%. And the ionospheric F2-layer peak height (hmF2) was ${\sim}300km$ higher and the vertical $E{\times}B$ drift (estimated from ground-based magnetometer equatorial electrojet delta H) showed downward drift, which may be due to the ionospheric disturbance dynamo electric field produced by the large amount of energy dissipation into high-latitude regions. In contrast, during November 20 event, the nightside TEC increases may be due to the prompt penetration westward electric field. The ionospheric F2-layer peak height was below 200km and the vertical $E{\times}B$ drift showed downward drift. Also, a strong correlation is observed between enhanced vertical TEC and enhaaced interplanetary electric field. It is shown that, even though TEC increases are caused by the different processes, the electric field disturbances in the ionosphere play an important role in the variation of TEC over Korea.
Keywords
southward IMF; ionosphere; ionospheric electric field; magnetic storm;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Tsurutani, B., Mannucci, A., Iijima, B., Abdu, M. A., Sobral, J. H. A., Gonzalez, W., Guarnieri, F., Tsuda, T., Saito, A., Yumoto K., Fejer, B., Fuller-Rowell, T. J., Kozyra, J., Foster, J. C., Coster, A., & Vasyliunas, V. M. 2004, JGR, 109, doi:10.1029/2003JA010342
2 Yizengaw, E., Moldwin, M. B., Komjathy, A., & Mannucci, A. J. 2006, JGR, 111, doi:10.1029/2005JA011433
3 Zhao, B., Wan, W., & Liu, L. 2005, Ann. Geophys., 23, 693   DOI   ScienceOn
4 Takahashi, K. & Bruce, A. T. 2001, JGR, 106, 21017   DOI
5 최병규, 박종욱, 정종균, 박필호 2005, 한국우주과학회지, 22, 283   과학기술학회마을
6 Blanc, M. & Richmond, A. D. 1980, JGR, 85, 1669   DOI
7 Forster, M. & Jakowski, N. 2000, Surveys in Geophysics, 21, 47   DOI   ScienceOn
8 Park, C. G. 1971, JGR, 76, 4560   DOI
9 Horvath, I. & Essex, E. A. 2003, Ann. Geophys., 21, 1017   DOI   ScienceOn
10 Huang, C. S., Foster, J. C., Goncharenko, L. P., Erickson, P. J., Rideout, W., & Coster, A. J. 2005, JGR, 110, dol:10.1029/2004JA010865
11 Kelley, M. C. 1989, in International Geophysics Series, vol.43, The Earth's Ionosphere, eds. R. Dmowska & J. R. Holton (New York: Elsevier), p.267
12 Scherliess, L. & Fejer, B. G. 1997, JGR, 102, 24037   DOI
13 Kelly, M. C., Makela, J. J., Chau, J. L., & Nicolls, M. J. 2003, GRL, 30, 1158   DOI
14 Mannucci, A. J., Tsurutani, B. T., Iijima, B. A., Komjathy, A., Saito, A., Gonzalez, W. D., Guarnieri, F. L., Kozyra, J. U., & Skoug, R. 2005, GRL, 32, doi:10.1029/2004GL021467
15 Sastri, J. H. 1988, Ann. Geophys., 6, 635