Unravelling signs of global change in the ionosphere
Ulich, T.; Clilverd, M.A.; Jarvis, M.J.; Rishbeth, H.. 2007 Unravelling signs of global change in the ionosphere. In: Lilensten, J., (ed.) Space weather: research towards applications in Europe (2007). Dordrecht, Springer, 95-105. (Astrophysics and Space Science, 344).Full text not available from this repository. (Request a copy)
As a consequence of alterations of atmospheric chemical composition due to anthropogenic emissions, Earth's ionosphere and thermosphere are expected to change. A number of authors tried to detect signs of global change in their ionospheric data, but many findings remain controversial. We briefly review long-term trends observed in the critical frequencies of the ionospheric E and F2 layers as well as in the height of the F2-peak, i.e. the layer of maximum electron density. Using 48 years of F2-layer critical frequency data from Sodankyla, Finland, we demonstrate how the sign and amplitude of the detected trends depend upon the choice of model fitted to the data and suggest a method to choose the best possible model.
|Item Type:||Publication - Book Section|
|Programmes:||BAS Programmes > Global Science in the Antarctic Context (2005-2009) > Sun Earth Connections|
|NORA Subject Terms:||Meteorology and Climatology
|Date made live:||10 Aug 2010 10:41|
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