Abstract
We consider the ionospheric response at heights of 120–220 km to geomagnetic disturbances in October and November 2003, which caused a strongly pronounced decrease in the electron content in the noted height range. For this disturbance period, using a technique of the authors, midday variations of the relative content of atomic and molecular oxygen at a height of 120 km were estimated. This estimation was performed with the help of ionospheric measurements (by a digital ionosonde) conducted at the Institute of Solar-Terrestrial Physics of the Russian Academy of Sciences from 2003 to 2006. Comparison of these values with similar values from the mass spectrometer-incoherent scatter (MSIS)-86 model showed that our estimates during disturbance days were two times less. This study continues research into the field of using ionospheric measurements to estimate the relative gas composition of the thermosphere at heights below the maximum of the F2 layer.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Buresova, D. and Lastovicka, J., Changes in the Fl Region Electron Density during Geomagnetic Storms at Low Solar Activity, J. Atmos. Sol.-Terr. Phys., 2001, vol. 63, pp. 537–544.
Hedin, A.E., MSIS-86 Thermospheric Model, J. Geophys. Res., 1987, vol. 92A, pp. 4649–4662.
Lastovicka, J., Monitoring and Forecasting of Ionospheric Space Weather Effects of Geomagnetic Storms, J. Atmos. Sol.-Terr. Phys., 2002, vol. 64, pp. 697–705.
Mikhailov, A.V., Ionospheric Fl Layer Long-Term Trends and the Geomagnetic Control Concept, Ann. Geophys., 2008, vol. 26, pp. 3793–3803.
Panasyuk, M.I., et al., Magnetic Storms in October 2003. Collaboration “Solar Extreme Events in 2003” (SES-2003), Kosm. Issled., 2004, vol. 42, no. 5, pp. 509–554.
Shchepkin, L.A., Kushnarenko, G.P., and Kuznetsova, G.M., Possibility of Estimating the Abundance of Oxygen Atoms and Molecules Based on Electron Density Measurements in the Middle Ionosphere, Geomagn. Aeron., 2008, vol. 48, no. 1, pp. 1–5 [Geomagn. Aeron. (Engl. Transl.), 2008, vol. 48, pp. 124–128].
Shchepkin, L.A., Kushnarenko, G.P., and Kuznetsova, G.M., Disturbances in the Ionospheric F1 Layer in April 2005, Soln.-Zemn. Fiz., 2009, no. 13, pp. 30–33.
Shchepkin, L.A., Kuznetsova, G.M., and Kushnarenko, G.P., Relative Concentration of Oxygen Atoms and Molecules at a Height of 120 km according to the Data of Ionospheric Measurements, Geomagn. Aeron., 2009, vol. 49, no. 4, pp. 129–133 [Geomagn. Aeron. (Engl. Transl.), 2009, vol. 49, pp. 524–527].
Tobiska, W.K. and Eparvier, F.G., EUV97: Improvements to EUV Irradiance Modeling in the Soft X-Rays and EUV, Sol. Phys., 1998, vol. 147, no. 1, pp. 147–159.
Author information
Authors and Affiliations
Additional information
Original Russian Text © G.P. Kushnarenko, G.M. Kuznetsova, O.E. Kolpakova 2010, published in Solnechno-Zemnaya Fizika, 2010, Vol. 15, pp. 118–123.
Rights and permissions
About this article
Cite this article
Kushnarenko, G.P., Kuznetsova, G.M. & Kolpakova, O.E. Reaction of the ionospheric F1 region to disturbances in October and November 2003 (analysis from Irkutsk digisonde measurements). Geomagn. Aeron. 50, 1015–1020 (2010). https://doi.org/10.1134/S0016793210080128
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0016793210080128