Equivalent current systems for the annual and semiannual Sq variations observed along the 210°MM CPMN stations

Journal of Geophysical Research: Space Physics

Volumn 114, Issue 12, 2009, Pages

  Yamazaki, Y ^a   Yumoto, K ^a   Uozumi, T ^a   Yoshikawa, A ^a   Cardinal, M G ^a  

^a KYUSHU UNIVERSITY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 77954332943     PISSN: None     EISSN: 21699402     Source Type: Journal    
DOI: 10.1029/2009JA014638     Document Type: Article

References (57)

1. Banks, R. J. (1969), Geomagnetic variations and the electrical conductivity of the upper mantle, Geophys. J. R. Astron. Soc., 17, 457-487
2. Banks, R. J., and E. C. Bullard (1966), The annual and 27 day magnetic variations, Earth Planet. Sci. Lett., 1, 118-120
3. Bhargava, B. N. (1972), Semiannual and annual modulation of the magnetic field, Planet. Space Sci., 20, 423-427
4. Bhargava, B. N., D. R. K. Rao, and B. R. Arora (1973), Semi-annual modulation of Earth's magnetic field in the equatorial electrojet region, Planet. Space Sci., 21, 1251-1255
5. Burrage, M. D., M. E. Hagan, W. R. Skinner, D. L. Wu, and P. B. Hays (1995), Long-term variability in the solar diurnal tide observed by HRDI and simulated by the GSWM, Geophys. Res. Lett., 22, 2641-2644
6. Campbell, W. H. (1981), Annual and semiannual variations of the geomagnetic field at equatorial locations, J. Atmos. Terr. Phys., 43, 607-616
7. Campbell, W. H. (1982), Annual and semiannual changes of the quiet daily variations (Sq) in the geomagnetic field at North American locations, J. Geophys. Res., 87, 785-796
8. Campbell, W. H. (1989), An introduction to quiet daily geomagnetic fields, Pure Appl. Geophys., 131, 315-331
9. q, currents: A comparison of quiet and active year behavior, J. Geophys. Res., 87, 5305-5308
10. Chapman, S. (1951), The Earth's Magnetism, John Wiley, New York
11. Chapman, S., and J. Bartels (1940), Geomagnetism, Oxford Univ. Press, London
12. Currie, R. G. (1966), The geomagnetic spectrum-40 days to 5.5 years, J. Geophys. Res., 71, 4579-4598
13. q variations at middle and low latitudes, Geomagn. Aeron., 5, 661-61
14. Forbes, J. M. (1981), The equatorial electrojet, Rev. Geophys. Space Phys., 19, 469-504
15. Fukushima, N. (1994), Some topics and historical episodes in geomagnetism and aeronomy, J. Geophys. Res., 99, 19, 113-19, 142
16. 9 foci in 1958, Pure Appl. Geophys., 110, 2076-2084
17. Gurubaran, S. (2002), The equatorial counter electrojet: Part of a worldwide current system?, Geophys. Res. Lett., 29(9), 1337, doi: 10.1029/ 2001GL014519
18. Hays, P. B., D. L. Wu, and the HRDI Science Team (1994), Observations of the diurnal tide from space, J. Atmos. Sci., 51, 3077-3093
19. q geomagnetic field variation, Aust. J. Phys., 34, 81-90
20. q variation-Annual, semi-annual and solar cycle variations and ring current effects, J. Atmos. Terr. Phys., 47, 341-352
21. Kamide, Y., A. D. Richmond, and S. Matsushita (1981), Estimation of ionospheric electric fields, ionospheric currents, and field-aligned currents from ground magnetic records, J. Geophys. Res., 86, 801-813
22. Kane, R. P. (1976), Geomagnetic field variations, Space Sci. Rev., 18, 413-540
23. q focus position in the South American continent, J. Earth Syst. Sci., 99, 405-412
24. q variation, II, J. Geomagn. Geoelectr., 8, 24-37
25. Le Sager, P., and T. S. Huang (2002), Ionospheric currents and field-aligned currents generated by dynamo action in an asymmetric Earth magnetic field, J. Geophys. Res., 107(A2), 1025, doi:10.1029/2001JA000211
26. q variation, I, J. Geomagn. Geoelectr, 7, 121-132
27. q overhead current system, J. Geophys. Res., 65, 3835-3839
28. Matsushita, S., and H. Maeda (1965), On the geomagnetic solar quiet daily variation field during the IGY, J. Geophys. Res., 70, 2535-2558
29. McLandress, C., G. G. Shepherd, and B. H. Solheim (1996), Satellite observations of thermospheric tides: Results from the Wind Imaging Interferometer on UARS, J. Geophys. Res., 101, 4093-4114 (Pubitemid 126678225)
30. Niehuss, K. O., H. C Euler Jr., and W. W. Vaughan (1996), Statistical technique for intermediate and long-range estimation of 13-month smoothed solar flux and geomagnetic indes, NASA Tech. Memo., NASA TM-4759
31. Olsen, N. (1997), Ionospheric F region currents at middle and low latitudes estimated from Magsat data, J. Geophys. Res., 102, 4563-4576
32. Onwumechili, C. A. (1992), A study of rocket measurements of ionospheric currents-II. Ionospheric currents outside the dip equatorial zone, Geophys. J. Int., 108, 641-646
33. q field of 1932-3, Philos. Trans. R. Soc. London, Ser. A, 256, 31-98
34. Prölss, G. W. (2004), Physics of the Earth's Space Environment, 1st ed., Springer, New York
35. Rastogi, R. G., and K. N. Iyer (1976), Quiet day variation of geomagnetic H-field at low latitudes, J. Geomagn. Geoelectr., 28, 461-479
36. Rastogi, R. G., S. Alex, and A. Patil (1994), Seasonal variations of geomagnetic D, H and Z fields at low latitudes, J. Geomagn. Geoelectr, 46, 115-126
37. Richmond, A. D. (1998), The ionosphere and upper atmosphere, in From the Sun, Auroras, Magnetic Storms, Solar Flares, Cosmic Rays, edited by S. T. Suess and B. T. Tsurutani, pp. 35-44, AGU, Washington, D.
38. Stening, R. J. (1995a), Variations in the strength of the Sq current system, Ann. Geophys., 13, 627-632
39. Stening, R. J. (1995b), What drives the equatorial electrojet?, J. Atmos Terr. Phys., 57, 1117-1128
40. Stening, R., T. Reztsova, and L. H. Minh (2005), Day-to-day changes in the latitudes of the foci of the Sq current system and their relation to equatorial electrojet strength, J. Geophys. Res., 110, A10308, doi:10.1029/ 2005JA011219
41. Stening, R., T. Reztsova, and L. H. Minh (2007), Variation of Sq focus latitudes in the Australian/Pacific region during a quiet sun year, J. Atmos. Sol. Terr. Phys., 69, 734-740 (Pubitemid 46488922)
42. Takeda, M. (1990), Geomagnetic field variation and the equivalent current system generated by an ionospheric dynamo at the solstice, J. Atmos. Terr. Phys., 52, 59-67
43. q field in 1964 and 1980, J. Atmos. Terr. Phys., 61, 765-774
44. q field from 1980 to 1990, J. Geophys. Res., 107(A9), 1252, doi:10.1029/2001JA009210
45. Tarpley, J. D. (1970), The ionospheric wind dynamo-II. Solar tides, Planet. Space Sci., 18, 1091-1103
46. Turner, J. P. R., D. E. Winch, D. J. Ivers, and R. J. Stening (2007), Regular daily variations in satellite magnetic field intensity data, Ann. Geophys., 25, 2167-2174
47. Uozumi, T., et al. (2008), A new index to monitor temporal and long-term variations of the equatorial electrojet by MAGDAS/CPMN real-time data: EE-Index, Earth Planets Space, 58, 1-11
48. q, J. Atmos. Terr. Phys., 26, 1187-1195
49. Van Wijk, A. M. (1953), Annual variation of the geomagnetic elements, J. Geophys. Res., 58, 418-419
50. Vincent, R. A., T. Tsuda, and S. Kato (1988), A comparative study of mesospheric solar tides observed at Adelaide and Kyoto, J. Geophys. Res., 93, 699-708
51. q-field, deduced with the method of natural non-orthogonal functions, Gerlands Beitr. Geophys., 86, 373-387
52. q-variations in median latitudes, J. Atmos. Terr. Phys., 30, 579-589
53. Wagner, C. U. (1969), The 'semi-annual' variation of the solar daily quiet geomagnetic variation in the European region, Gerlands Beitr. Geophys., 78, 120-130
54. Wagner, C. U., D. Möhlmann, and K. Schäfer (1980), Large-scale electric fields and currents and related geomagnetic variations in the quiet plasmasphere, Space Sci. Rev, 26, 391-446
55. Yamashita, S., and T. Iyemori (2002), Seasonal and local time dependences of the interhemispheric field-aligned currents deduced from Orsted satellite and the ground geomagnetic observations, J. Geophys. Res., 107(A11), 1372, doi:10.1029/2002JA009414
56. q(K) range and of its prominent periodicities, Pure Appl. Geophys., 113, 601-609
57. Yumoto, K. and the CPMN Group (2001), Characteristics of Pi 2 magnetic pulsations observed at the CPMN stations: A review of the step results, Earth Planets Space, 53, 981-992