Inter-Hemispheric Comparison of Ionospheric TEC Variation at Each Latitudinal Band During Quiet Geomagnetic Condition

Authors

  • Shola Adebiyi
    Department of Physics, Landmark University, P.M.B. 1001, Omu-Aran, Kwara State, Nigeria
  • Isaac Adimula
    Department of Physics, University of Ilorin, P.M.B. 1515, Ilorin, Kwara State, Nigeria.
  • Olushola Oladipo
    Department of Physics, University of Ilorin, P.M.B. 1515, Ilorin, Kwara State, Nigeria.

Keywords:

TEC, Solar activity, Winter anomaly, Equinoctial asymmetry

Abstract

This paper compares the quiet time variation of the Total Electron Content (TEC) over four stations located at high and mid latitudes in the northern and southern hemispheres of the African-European longitudes. Five years Global Positioning System (GPS) data, from 2002 to 2006, representing the periods of high to low solar activities were used for the study. Generally, the maximum diurnal values of TEC are observed between 10:00 – 14:00 LT in all the stations during the periods investigated. The minimum values of TEC are observed during the pre-sunrise hours for the two mid latitude stations and around the pre-midnight/post-midnight for the high latitude stations. The maximum values of TEC, however vary with season, latitude and solar activity in all the stations. The values decrease with increase in latitudes and decrease in solar activity. The values range between 10 – 32 and 11 – 50 TECU respectively, for high and mid latitudes for all the years considered. Seasonally, the highest values of TEC are generally observed during the equinoxes in all the stations except at the southern mid latitude station where it can as well be observed in summer, particularly during the Moderate Solar Activity (MSA) and Low Solar Activity (LSA) periods. The lowest values of TEC are observed in winter in all the stations in the southern hemisphere and can be observed in both winter and summer for stations in the northern hemisphere depending on the latitude and solar activity period. TEC variation also exhibits (1) asymmetry in the equinoctial values in all the stations and the magnitude is most pronounced during the period of High Solar Activity (HSA); (2) winter ionosphere anomaly feature, observed only in the northern hemisphere stations; and (3) daytime minimum and nighttime maximum in the diurnal structures of TEC at high latitude in the northern hemisphere during the winter. The nighttime maximum value was observed around 21:00 LT with magnitude that decreases with decrease in solar activity. The annual maximum value of TEC decreases with solar activity at all the stations, with the highest/lowest peak observed in HSA/LSA periods.

Dimensions

Adebiyi, S.J., Odeyemi, O. O., Adimula, I. A., Oladipo, O. A., Ikubanni, S.O., Adebesin, B.O., and Joshua, B.W., (2014). GPS derived TEC and foF2 variability at an equatorial station and the performance of IRI-model. Advances in Space Research, http://dx.doi.org/10.1016/j.asr.2014.03.026.

Aggarwal, M., Joshi, H.P., Iyer, K.N., Kwak, Y.S., Lee, J.J., Chandra, H., and Cho, K.S., (2012). Day-to-day variability of equatorial anomaly in GPS-TEC during low solar activity period. Advances in Space Research, 49, 1709 - 1720.

Aruliah, A.L., Farmer, A. D., FullerRowell, T. J., Wild, M. N., Hapgood, M., and Rees, D., (1996). An equinoctial asymmetry in the high-latitude thermosphere and ionosphere. J. Geophys Res-Space, 101 (A7), 15713 - 15722.

Bagiya, M. S., Joshi, H. P., Iyer, K. N., Aggarwal, M., Ravindran, S., and Pathan, B. M., (2009). TEC variations during low solar activity period (2005–2007) near the Equatorial Ionospheric Anomaly Crest region in India. Annales Geophysicae, 27, 1047–1057.

Balan, N., Otsuka, Y., and Fukao, S., (1997). New aspects in the annual variation of the ionosphere observed by the MU Radar, Geophysical Research Letter, 24, 2287–2290.

Bhuyan, P. K., and Hazarika, R., (2013). GPS TEC near the crest of the EIA at 95oE during the ascending half of solar cycle 24 and comparison with IRI simulations. Advances in Space Research, 52, 1247–1260.

Bhuyan, P. K., and Hazarika, R., (2013). GPS TEC near the crest of the EIA at 95oE during the ascending half of solar cycle 24 and comparison with IRI simulations. Advances in Space Research, 52, 1247–1260.

Chauhan,V., Singh, O. P., and Singh, B., (2011). Diurnal and seasonal variation of GPS-TEC during a low solar activity period as observed at a low latitude station Agra. Indian Journal of Radio and Space Physics, 40, 26 – 36.

Chen, Y., Liu, L., Wan, W., and Ren, Z., (2012). Equinoctial asymmetry in solar activity variations of NmF2 and TEC. Annales Geophysicae, 30, 613–622.

Chung, J.-K., Jee, G., and Lee, C. –N., (2011). Global Positioning System Total Electron Content Variation over King Sejong Station in Antarctic under the Solar Minimum Condition Between 2005 and 2009. Journal of Astronomy and Space Science, 28(4), 305-310.

D’ujanga, F.M., Mubiru, J., Twinamasiko, B.F., Basalirwa, C., Ssenyonga, T.J., (2012). Total electron content variations in equatorial anomaly region. Advances in Space Research, 50, 441–449.

Essex, E.A., (1977). Equinoctial variations in the total electron content of the ionosphere at Northern and Southern Hemisphere stations. Journal of Atmospheric and Solar-Terrestrial physics, 39, 645–650.

Huo, X. L., Yuan,Y.B., J. K. Ou, J. K., Zhang, K. F., and Bailey, G.J., (2009). Monitoring the global-scale winter anomaly of total electron contents using GPS data. Earth Planets Space, 61, 1019–1024.

Klimenko, M.V. and Klimenko, V. V., (2012). Disturbance dynamo, prompt penetration electric field and oversheilding in the Earth’s ionosphere during geomagnetic storm. Journal of Atmospheric and Solar-Terrestrial Physics, 90 - 91, 146 – 155.

Kouris, S.S., Polimeris, K.V., Ciraolo, L., Fotiadis, D.N., (2009). Seasonal dependence of TEC and SLAB thickness. Advances in Space Research, 44, 715–724.

Krankowski, A., Shagimuratov, I.I., Ephishov, I.I., Krypiak-Gregorczyk, A., Yakimova, G., (2009). The occurrence of the mid-latitude ionosphere trough in GPS-TEC measurements. Advances in Space Research, 43, 1721–1731.

Liu, H., Lühr, H., and Watanabe, S., (2007). Climatology of the equatorial thermospheric mass density anomaly, Journal of Geophysical Research, 112, A05305, doi:10.1029/2006JA012199.

Maruyama, T., Saito, S., Kawamura, M., Nozaki1, K., Krall, J., and Huba, J. D., (2009). Equinoctial asymmetry of a low-latitude ionosphere-thermosphere system and equatorial irregularities: evidence for meridional wind control. Annales Geophysicae, 27, 2027–2034.

Millward, G.H., Rishbeth, H., and Fuller-Rowell, T.J., (1996). Ionospheric F2 layer seasonal and semiannual variations. Journal of Geophsical Research, 101 (A3), 5149 – 5156.

Namgaladze, A. A., Namgaladze, A. N., and Volkov, M. A., (1997). Numerical modeling of the thermospheric and ionosphere effects of magnetospheric processes in the cusp region, Annales Geophysicae, 14, 1343–1355.

Obrou, O.K., Mene, M.N., Kobea, A.T., Zaka, K.Z., (2009). Equatorial total electron content (TEC) at low and high solar activity. Advances in Space Research, 43, 1757–1761.

Perevalova, N. P., Polyakova, A. S., and Zalizovski, A. V., (2010). Diurnal variations of the total electron content under quiet helio-geomagnetic conditions. Journal of Atmospheric and Solar-Terrestrial Physics, 72, 997–1007.

Prasad, S.N.V.S., Rama Rao, P.V.S., Prasad, D.S.V.V.D., Venkatesh, K., Niranjan, K., (2012). On the variabilities of the Total Electron Content (TEC) over the Indian low latitude sector. Advances in Space Research, 49, 898–913.

Prölss, G.W. (2006) Ionospheric F-region Storms: Unsolved Problems. In Characterising the Ionosphere (pp. 10-1 – 10-20). Meeting Proceedings RTO-MP-IST-056, Paper 10. Neuilly-sur-Seine, France: RTO. Available from: http://www.rto.nato.int/abstracts.asp.

Rabiu, A.B., Adewale, A.O., Abdulrahim, R.B., Oyeyemi, E.O., (2014). TEC derived from some GPS stations in Nigeria and comparison with the IRI and NeQuick models. Advances in Space Research, 53, 1290–1303.

Ren, Z., Wan, W., Liu, L., Chen, Y., and Le, H., (2011). Equinoctial asymmetry of ionosphere vertical plasma drifts and its effect on F-region plasma density. Journal of Geophsical Research, 116, A02308, http://dx.doi.org/10.1029/ 2010JA016081.

Ritter, P., Lühr, H., Maus, S., and Viljanen, A., (2004). High-latitude ionosphere currents during very quiet times: their characteristics and predictability. Annales Geophysicae, 22, 2001–2014.

Torr, D.G., and Torr, M.R., (1973). The seasonal behavior of the F2 layer of the ionosphere. Journal of Atmospheric and Solar Terrestrial Physics 35, 2237–2251.

Tsai, H. –F., Liu, J. –Y., Tsai, W. – H., and Liu, C. –H., (2001). Seasonal variations of the ionosphere total electron content in Asian equatorial anomaly regions. Journal of Geophysical Research, 106, (30), 363 – 369, 2001.

Xu, J.S., Li, X.J., Liu, Y.W., Jing, M., (2014). TEC differences for the mid-latitude ionosphere in both sides of the longitudes with zero declination. Advances in Space Research, 54, 883–895.

Yadav, S., Dabas,R.S., Das, R. M., Upadhayaya, A. K.,Kavita Sharma, K., and Gwal, A. K., (2010). Diurnal and seasonal variation of F2-layer ionosphere parameters at equatorial ionization anomaly crest region and their comparison with IRI-2001. Advances in Space Research, 45, 361–367.

Zakharenkova, I., E., Cherniak, I. V., Krankowski, A., and Shagimuratov, I. I., (2014). Cross-hemisphere comparison of mid-latitude ionosphere variability during 1996 – 2009: Juliusruh vs. Hobart. Advances in Space Research, 53, (2014) 175 – 189.

Zhang, M. -L., Wan, W., Liu, L., and Ning, B., (2009). Variability study of the crest-to-trough TEC ratio of the equatorial ionization anomaly around 120oE longitude. Advances in Space Research, 43, 1762–1769.

Zhenzhong, X., Wang, W., Zhou, N., Song, X., and Zhu, H., (2013). Variability study of ionosphere total electron content at crest of equatorial anomaly in China from 1997 to 2007. Advances in Space Research, 50, 70–76.

Zoundi, C., Ouattara, F., Fleury, R., Amory-Mazaudier, C., Lassudrie Duchesne, P., (2012). Seasonal TEC Variability in West Africa Equatorial Anomaly Region. European Journal of Scientific Research, 77, 303-313.

Published

2020-05-13

How to Cite

Inter-Hemispheric Comparison of Ionospheric TEC Variation at Each Latitudinal Band During Quiet Geomagnetic Condition. (2020). Journal of the Nigerian Society of Physical Sciences, 2(2), 77-90. https://doi.org/10.46481/jnsps.2020.23

Issue

Volume 2, Issue 2, May 2020

Section

Original Research
Copyright & Licensing

How to Cite

Inter-Hemispheric Comparison of Ionospheric TEC Variation at Each Latitudinal Band During Quiet Geomagnetic Condition. (2020). Journal of the Nigerian Society of Physical Sciences, 2(2), 77-90. https://doi.org/10.46481/jnsps.2020.23

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