Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/8851
AuthorsKutiev, I.* 
Tsagouri, I.* 
Perrone, L.* 
Pancheva, D.* 
Mukhtarov, P.* 
Mikhailov, A.* 
Lastovicka, J.* 
Jakowski, N.* 
Buresova, D.* 
Blanch, E.* 
Andonov, B.* 
Altadill, D.* 
Magdaleno, S.* 
Parisi, M.* 
Torta, J. M.* 
TitleSolar activity impact on the Earth’s upper atmosphere
Issue DateDec-2013
Series/Report no./ 3 (2013)
DOI10.1051/swsc/2013028
URIhttp://hdl.handle.net/2122/8851
Keywordsionosphere
solar activity
storm
total electron content
data analysis
Subject Classification01. Atmosphere::01.02. Ionosphere::01.02.01. Ion chemistry and composition 
01. Atmosphere::01.02. Ionosphere::01.02.04. Plasma Physics 
AbstractThe paper describes results of the studies devoted to the solar activity impact on the Earth’s upper atmosphere and ionosphere, conducted within the frame of COST ES0803 Action. Aim: The aim of the paper is to represent results coming from different research groups in a unified form, aligning their specific topics into the general context of the subject. Methods: The methods used in the paper are based on data-driven analysis. Specific databases are used for spectrum analysis, empirical modeling, electron density profile reconstruction, and forecasting techniques. Results: Results are grouped in three sections: Medium- and long-term ionospheric response to the changes in solar and geomag- netic activity, storm-time ionospheric response to the solar and geomagnetic forcing, and modeling and forecasting techniques. Section 1 contains five subsections with results on 27-day response of low-latitude ionosphere to solar extreme-ultraviolet (EUV) radiation, response to the recurrent geomagnetic storms, long-term trends in the upper atmosphere, latitudinal dependence of total electron content on EUV changes, and statistical analysis of ionospheric behavior during prolonged period of solar activity. Section 2 contains a study of ionospheric variations induced by recurrent CIR-driven storm, a case-study of polar cap absorption due to an intense CME, and a statistical study of geographic distribution of so-called E-layer dominated ionosphere. Section 3 comprises empirical models for describing and forecasting TEC, the F-layer critical frequency foF2, and the height of maximum plasma density. A study evaluates the usefulness of effective sunspot number in specifying the ionosphere state. An original method is presented, which retrieves the basic thermospheric parameters from ionospheric sounding data.
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