Unravelling signs of global change in the ionosphere

Ulich, T.; Clilverd, M.A. ORCID:; 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).

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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
ISBN: 1402054459
NORA Subject Terms: Meteorology and Climatology
Atmospheric Sciences
Date made live: 10 Aug 2010 10:41 +0 (UTC)

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