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The Transient Variation in the Complexes of the Low-latitude Ionosphere Within the Equatorial Ionization Anomaly Region of Nigeria : Volume 22, Issue 5 (11/09/2015)

By Rabiu, A. B.

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Book Id: WPLBN0004023589
Format Type: PDF Article :
File Size: Pages 17
Reproduction Date: 2015

Title: The Transient Variation in the Complexes of the Low-latitude Ionosphere Within the Equatorial Ionization Anomaly Region of Nigeria : Volume 22, Issue 5 (11/09/2015)  
Author: Rabiu, A. B.
Volume: Vol. 22, Issue 5
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2015
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Fuwape, I. A., Laoye, J. A., Ogunsua, B. O., & Rabiu, A. B. (2015). The Transient Variation in the Complexes of the Low-latitude Ionosphere Within the Equatorial Ionization Anomaly Region of Nigeria : Volume 22, Issue 5 (11/09/2015). Retrieved from http://hawaiilibrary.net/


Description
Description: Space Physics Laboratory, Department of Physics, Federal University of Technology, Akure, Nigeria. The quest to find an index for proper characterization and description of the dynamical response of the ionosphere to external influences and its various internal irregularities has led to the study of the day-to-day variations of the chaoticity and dynamical complexity of the ionosphere. This study was conducted using Global Positioning System (GPS) total electron content (TEC) time series, measured in the year 2011, from five GPS receiver stations in Nigeria, which lies within the equatorial ionization anomaly region. The non-linear aspects of the TEC time series were obtained by detrending the data. The detrended TEC time series were subjected to various analyses to obtain the phase space reconstruction and to compute the chaotic quantifiers, which are Lyapunov exponents LE, correlation dimension, and Tsallis entropy, for the study of dynamical complexity. Considering all the days of the year, the daily/transient variations show no definite pattern for each month, but day-to-day values of Lyapunov exponents for the entire year show a wavelike semiannual variation pattern with lower values around March, April, September and October. This can be seen from the correlation dimension with values between 2.7 and 3.2, with lower values occurring mostly during storm periods, demonstrating a phase transition from higher dimension during the quiet periods to lower dimension during storms for most of the stations. The values of Tsallis entropy show a similar variation pattern to that of the Lyapunov exponent, with both quantifiers correlating within the range of 0.79 to 0.82. These results show that both quantifiers can be further used together as indices in the study of the variations of the dynamical complexity of the ionosphere. The presence of chaos and high variations in the dynamical complexity, even in quiet periods in the ionosphere, may be due to the internal dynamics and inherent irregularities of the ionosphere which exhibit non-linear properties. However, this inherent dynamics may be complicated by external factors like geomagnetic storms. This may be the main reason for the drop in the values of the Lyapunov exponent and Tsallis entropy during storms. The dynamical behaviour of the ionosphere throughout the year, as described by these quantifiers, was discussed in this work.

Summary
The transient variation in the complexes of the low-latitude ionosphere within the equatorial ionization anomaly region of Nigeria

Excerpt
Abdu, M. A.: Major Phenomena of the equatorial ionosphere thermosphere system under disturbed conditions, J. Atmos. Solten Phys., 59, 1505–1519, 1997.; Anastasiadis, A., Costa, L., Gonzáles, C., Honey, C., Széliga, M., and Terhesiu, D.: Measures of Structural Complexity in Networks, Complex Systems Summer School 2005, Santa Fe, 2005.; Baillie, R. and Chung, S.: Modeling and forecasting from trend stationary long memory models, with applications in climatology, Int. J. Forecast., 18, 215–226, 2002.; Balan, N. and Rao, P. B.: Latitudinal variations of nighttime enhancements in total electron content, J. Geophys. Res., 92, 3436–3440, 1987.; Balan, N., Bailey, G. J., and Balachandia, N. R.: Solar and Magnetic effects on the latitudinal variations of nighttime TEC enhancement, Ann. Geophys., 9, 60–69, 1991.; Balasis, G. and Mandea, M.: Can electromagnetic disturbances related to the recent great earthquakes be detected by satellite magnetometers?, Tectonophysis, 431, 173–195, doi:10.1016/j.tecto.2006.05.038, 2007.; Balasis, G., Daglis, I. A., Papadimitrou, C., Kalimeri, M., Anastasiadis, A., and Eftaxias, K.: Dynamical complexity in Dst time series using non-extensive Tsallis entropy, Geophs. Res. Lett., 35, L14102, doi:10.1029/2008GL034743, 2008.; Consolini, G., Marcucci, M. F., and Candidi, M.: Multifractal structure of auroral electrojet index data, Phys. Rev. Lett., 76, 4082–4085, 1996.; Balasis, G., Daglis, I. A., Papadimitrou, C., Kalimeri, M., Anastasiadis, A., and Eftaxias, K.: Investigating Dynamical complexity in the magnetosphere using various entropy measures, J. Geopys. Res., 114, A00D06, doi:10.1029/2008JA014035, 2009.; Baranger, M., Latora, V., and Rapisarda, A.: Time evolution of thermodynamic entropy for conservative and dissipative chaotic maps, Chaos Soliton Fract., 12, 471–478, 2002.; Bhattacharyya, A.: Chaotic behavior of ionosphere turbulence from scintillation measurements, J. Geophys. Res., 17, 733–738, 1990.; Bhattacharyya, A. and Pandit, J.: Seasonal variationof spread-F occurrence probability at low latitude and its relation with sunspot number, Int. J. Elect. Commun. Technol., 5, 40–43, 2014.; Bloomfeld, P.: Trends in global Temperature, Climate Change, 21, 1–16, 1992.; Bloomfield, P. and Nychka, D.: Climate spectra and detecting climate change, Climate Change, 21, 275–287, 1992.; Boon, J. and Tssallis, C. (Eds.): Nonexistensive statistical mechanics: New trends, new perspectives, Europhys. News, 36, 185–231, 2005.; Burgula, L. F., Vixas, A. F., and Wang, C.: Tsallis distribution of magnetic field strength variations in the heliosphere: 5 to 90 AU, J. Geophys. Res., 112, A07206, doi:10.1029/2006JA012213, 2007.; Chang, T.: Low-Dimensional Behavior and Symmetry-Breaking of Stochastic-Systems Near Criticality-Can These Effects Be Observed in Space and in the Laboratory, IEEE T. Plasma Sci., 2, 691–694, 1992.; Chang, T.: Sporadic localized reconnection and multiscale intermittent turbulence in the magnetotail, in: AGU Monograph No. 104, Geospace Mass and Energy Flow, edited by: Horwitz, J. L., Gallagher, D. L., and Peterson, W. K., American Geophysical Union, Washington, D.C., p. 193, 1998.; Chang, T.: Self-organized criticality, multi-fractal spectra, sporadic localized reconnections and intermittent turbulence in the magnetotail, Phys. Plasmas, 6, 4137–4145, 1999.; Chapman, S. C., Watkins, N. W., Dendy, R. O., Helander, P., and Rowlands, G.: A simple avalanche model as an analogue for magnetospheric activity, Geophys. Res. Lett., 25, 2397–2400, 1998.; Coco, I., Consolini, G., Amata, E., Marcucci, M. F., and Ambrosino, D.: Dynamical changes of the polar cap potential structure: an information theory approach, N

 

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