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Superposed Epoch Analysis of High Latitude Ionospheric Joule Heating during Major Geomagnetic Storms over three Solar Cycles

Published online by Cambridge University Press:  27 November 2018

K. J. Suji  and
P. R. Prince
K. J. Suji
Affiliation:
Department of Physics, University College, Thiruvananthapuram 695034, Kerala, India email: [email protected], [email protected]
P. R. Prince
Affiliation:
Department of Physics, University College, Thiruvananthapuram 695034, Kerala, India email: [email protected], [email protected]
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Abstract

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Superposed epoch analysis (SPEA) is commonly used to determine some basic structure in a collection of geophysical time series. The present study tries to analyze ionospheric Joule heating response at high latitudes, to the prevailing solar wind and IMF conditions on the basis of SPEA. Major geomagnetic storms (CME driven) over three consecutive solar cycles (SC 22, 23 and 24) have been selected. Ascending phase, solar maximum, and declining phase are investigated separately, for each solar cycle, to find out crucial controlling parameters for the generation of high-latitude ionospheric Joule heating. SPEA results show that, IMF parameters such as IMF By, IMF Bz, IMF clock angle and solar wind parameters such as dynamic pressure and proton density influence Joule heating production rate significantly. Meanwhile, the relentlessness of the other parameters such as IMFBt and solar wind bulk speed show that they have poor impact on Joule heating.

Keywords

ionospheric Joule heatinginterplanetary magnetic fieldsolar wind dynamic pressureproton density
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S340: Long-term Datasets for the Understanding of Solar and Stellar Magnetic Cycles , February 2018 , pp. 67 - 68
Copyright
Copyright © International Astronomical Union 2018 

References

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