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Variations in the equatorial ionization anomaly peaks in the Western Pacific region during the geomagnetic storms of April 6 and July 15, 2000

Earth, Planets and Space volume 59, pages 401–405 (2007)Cite this article

Abstract

This study utilizes total electron content (TEC) observed by a network of ground-based GPS receivers located in the Western Pacific region (∼120°E) to study the responses of the low-latitude equatorial ionization anomaly (EIA) to the two major magnetic storms that occurred during April 4–10 and July 12–18, 2000. The latitude, time, and TEC (LTT) maps in the northern and southern EIA regions show that both EIA peaks move equatorward along with a pronounced reduction of the TEC values 10–12 h after the storm onset. The variations in the EIA peak TEC values and locations in the northern EIA are highly correlated with those in the southern EIA. The correlation coefficients of the day-to-day variations of peaked TEC between the northern and southern EIA regions are 0.75 in the April storm and 0.83 in the July storm. The correlation coefficients of the day-to-day EIA peak movements between the two hemispheres are 0.98 in the April storm event and 0.88 in the July storm event. The highly correlated peaked TEC and movements between the northern and the southern hemisphere suggest that the storm-produced electrodynamics played a dominant role in affecting the low-latitude ionosphere during the two major storms.

References

  • Anderson, D. N., A theoretical study of the ionospheric F-region equatorial anomaly, I, Theory, Planet. Space Sci., 21, 409–419, 1973.

    Article  Google Scholar 

  • Appleton, E. V., Two anomalies in the ionosphere, Nature, 157, 691, 1946.

    Article  Google Scholar 

  • Balan, N. and G. J. Bailey, Equatorial plasma fountain and its effects: Possibility of an additional layer, J. Geophys. Res., 100(A11), 21,421–21,432, 1995.

    Article  Google Scholar 

  • Blanc, M. and A. D. Richmond, The ionospheric disturbance dynamo, J. Geophys. Res., 85, 1669–1686, 1980.

    Article  Google Scholar 

  • Buonsanto, Ionospheric Storms—A Review, Space Sci. Rev., 88, 563–601, 1999.

    Article  Google Scholar 

  • Burns, A. G., T. L. Killen, and R. G. Roble, A theoretical study of thermospheric composition perturbations during an impulsive geomagnetic storm, J. Geophys. Res., 96, 14153–14167, 1991.

    Article  Google Scholar 

  • Burns, A. G., T. L. Killeen, G. R. Carignan, and R. G. Roble, Large enhancements in the O/N2 ratio in the evening sector of the winter hemisphere during geomagnetic storms, J. Geophys. Res., 100(A8), 14,661–14,672, 1995.

    Article  Google Scholar 

  • Duncan, R. A., The equatorial F region of the ionosphere, J. Atmos. Terr. Phys., 18, 89, 1960.

    Article  Google Scholar 

  • Fejer, B. G. and L. Scherliess, Time dependent response of equatorial ionospheric electric field to magnetospheric disturbance, Geophys. Res. Lett., 22, 851–854, 1995.

    Article  Google Scholar 

  • Fejer, B. G. and L. Scherliess, Empirical models of storm time equatorial zonal electric fields, J. Geophys. Res., 102(A11), 24047–24056, 10.1029/97JA02164, 1997.

    Article  Google Scholar 

  • Fesen, C. G., G. Growley, and R. G. Roble, Ionospheric Effects at Low Latitudes During the March 22, 1979, Geomagnetic Storm, J. Geophys. Res., 94(A5), 5405–5417, 1989.

    Article  Google Scholar 

  • Fuller-Rowell, T. J., M. V. Codrescu, R. J. Moffett, and S. Quegan, Response of the thermosphere and ionosphere to geomagnetic storms, J. Geophys. Res., 99, 3893–3914, 1994.

    Article  Google Scholar 

  • Fuller-Rowell, T. J., M. V. Codrescu, H. Risbeth, R. J. Moffett, and S. Quegan, On the seasonal response of the thermosphere and ionosphere to geomagnetic storms, J. Geophys. Res., 101(A2), 2343–2354, 1996.

    Article  Google Scholar 

  • Fuller-Rowell, T. J., M. V. Codrescu, R. G. Roble, and A. D. Richmond, How Does the Thermosphere and Ionosphere React to a Geomagnetic Storm?, in Magnetic Storms, edited by B. T. Tsurutani, W. D. Gonzales and Y. Kamide, AGU Monograph, Washington D. C., 1997.

    Google Scholar 

  • Fuller-Rowell, T. M., G. H. Millward, A. D. Richmond, and M. V. Codrescu, Storm-time changes in the upper atmosphere at low latitudes, J. Atmos. Sol. Terr. Phys., 64, 1383, 2002.

    Article  Google Scholar 

  • Hanson, W. B. and R. J. Moffett, Ionization transport effects in the equatorial F region, J. Geophys. Res., 71, 5559, 1966.

    Article  Google Scholar 

  • Jaggi, R. K. and R. A. Wolf, Self-consistent calculation of the motion of a sheet of ions in the magnetosphere, J. Geophys. Res., 78, 2852–2866, 1973.

    Article  Google Scholar 

  • Kelley, M. C., B. G. Fejer, and C. A. Gonzales, An explanation for anomalous equatorial ionospheric electric fields associated with a northward turning of the interplanetary magnetic field, Geophys. Res. Lett., 6, 301–304, 1979.

    Article  Google Scholar 

  • Kelley, M. C., J. J. Makela, J. L. Chau, and M. J. Nicolls, Penetration of the solar wind electric field into the magnetosphere/ionosphere system, Geophys. Res. Lett., 30(4), 1158, doi:10.1029/2002GL016321, 2003.

    Article  Google Scholar 

  • Kil, H., L. J. Paxton, X. Pi, M. R. Hairston, and Y. Zhang, Case study of the 15 July 2000 magnetic storm effects on the ionosphere-driver of the positive ionospheric storm in the winter hemisphere, J. Geophys. Res., 108(A11), 1391, doi:10.1029/2002JA009782, 2003.

    Article  Google Scholar 

  • Lin, C. H., A. D. Richmond, J. Y. Liu, H. C. Yeh, L. J. Paxton, G. Lu, H. F. Tsai, and S.-Y. Su, Large-scale variations of the low-latitude ionosphere during the October–November 2003 superstorm: Observational results, J. Geophys. Res., 110, A09S28, doi:10.1029/2004JA010900, 2005a.

    Google Scholar 

  • Lin, C. H., A. D. Richmond, R. A. Heelis, G. J. Bailey, G. Lu, J. Y. Liu, H. C. Yeh, and S.-Y. Su, Theoretical study of the low- and midlatitude ionospheric electron density enhancement during the October 2003 superstorm: Relative importance of the neutral wind and the electric field, J. Geophys. Res., 110, A12312, doi:10.1029/2005JA011304, 2005b.

    Article  Google Scholar 

  • Liu, J. Y., H. F. Tsai, and T. K. Jung, Total electron content obtained by using the global positioning system, Terr. Atmos. Oceanic Sci., 7, 107–117, 1996.

    Google Scholar 

  • Lu, G., X. Pi, A. D. Richmond, and R. G. Roble, Variations of total electron content during geomagnetic disturbances: A model/observation comparison, Geophys. Res. Lett., 25(3), 253–256, 10.1029/97GL03778, 1998.

    Article  Google Scholar 

  • Maruyama, N., A. D. Richmond, T. J. Fuller-Rowell, M. V. Codrescu, S. Sazykin, F. R. Toffoletto, R. W. Spiro, and G. H. Millward, Interaction between direct penetration and disturbance dynamo electric fields in the storm-time equatorial ionosphere, Geophys. Res. Lett., 32, L17105, doi:10.1029/2005GL023763, 2005.

    Article  Google Scholar 

  • Namba, S. and K.-I. Maeda, Radio Wave Propagation, 86 pp., Corona, Tokyo, 1939.

    Google Scholar 

  • Prölss, G. W., Storm-induced changes in the thermospheric composition at middle latitudes, Planet. Space Sci., 35, 807–811, 1987.

    Article  Google Scholar 

  • Prölss, G. W., Ionospheric F-Region Storms, in Handbook of Atmospheric Electrodynamics, edited by H. Volland, CRC Press, 1995.

    Google Scholar 

  • Prölss, G. W., Magnetic storm associated perturbations of the upper atmosphere, in Magnetic Storms, Geophys. Monogr. Ser., vol. 98, edited by B. T. Tsurutani et al., pp. 227–241, AGU, Washington D. C., 1997.

    Chapter  Google Scholar 

  • Richmond, A. D., Ionospheric electrodynamics using Magnetic Apex Coordinates, J. Geomag. Geoelectr., 47, 191–212, 1995.

    Article  Google Scholar 

  • Richmond, A. D., C. Peymirat, and R. G. Roble, Long-lasting disturbances in the equatorial ionospheric electric field simulated with a coupled magnetosphere-ionosphere-thermosphere model, J. Geophys. Res., 108(A3), 1118, doi:10.1029/2002JA009758, 2003.

    Article  Google Scholar 

  • Rishbeth, H., How the thermospheric circulation affects the ionospheric F2-layer, J. Atmos. Sol. Terr. Phys, 60, 1385–1402, 1998.

    Article  Google Scholar 

  • Rishbeth, H., The equatorial F-layer: Progress and puzzles, Ann. Geophys., 18, 730, 2000.

    Article  Google Scholar 

  • Rishbeth, H., T. J. Fuller-Rowell, and A. D. Rodger, F-layer storms and thermospheric composition, Phys. Scripta., 36, 327–336, 1987.

    Article  Google Scholar 

  • Sastri, J. H., K. Niranjan, and K. S. V. Subbarao, Response of the equatorial ionosphere in the Indian (midnight) sector to the severe magnetic storm of July 15, 2000, Geophys. Res. Lett., 29(13), 1651, doi:10.1029/2002GL015133, 2002.

    Article  Google Scholar 

  • Scherliess, L. and B. G. Fejer, Storm time dependence of equatorial disturbance dynamo zonal electric fields, J. Geophys. Res., 102(A11), 24,037–24,046, 1997.

    Article  Google Scholar 

  • Senior, C. and M. Blanc, On the control of magnetospheric convection by the spatial distribution of ionospheric conductivities, J. Geophys. Res., 89, 261–284, 1984.

    Article  Google Scholar 

  • Spiro, R. W., R. A. Wolf, and B. G. Fejer, Penetration of high-latitude-electric-field effects to low latitudes during SUNDIAL 1984, Ann. Geophys., 6, 39–50, 1988.

    Google Scholar 

  • Tsai, H. F. and J. Y. Liu, Ionospheric total electron content response to solar eclipses, J. Geophys. Res., 104, 12657, 1999.

    Article  Google Scholar 

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Authors and Affiliations

  1. National Space Organization, Hsinchu, Taiwan

    Chien-Hung Lin & Chio-Zong Cheng

  2. Institute of Space Science, National Central University, Chung-Li, Taiwan

    Jann-Yenq Liu

  3. Center for Space and Remote Sensing Research, National Central University, Chung-Li, Taiwan

    Jann-Yenq Liu

  4. Central Weather Bureau, Taipei, Taiwan

    Ho-Fang Tsai

  5. Plasma and Space Science Center, National Cheng-Kung University, Tainan, Taiwan

    Chio-Zong Cheng

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  1. Chien-Hung Lin
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  2. Jann-Yenq Liu
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Correspondence to Chien-Hung Lin.

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Lin, CH., Liu, JY., Tsai, HF. et al. Variations in the equatorial ionization anomaly peaks in the Western Pacific region during the geomagnetic storms of April 6 and July 15, 2000. Earth Planet Sp 59, 401–405 (2007). https://doi.org/10.1186/BF03352701

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