Open Access

Aeronomic effects of the solar flares in the topside ionosphere

Earth, Planets and Space200961:BF03352941

https://doi.org/10.1186/BF03352941

Received: 23 October 2007

Accepted: 20 March 2008

Published: 29 May 2009

Abstract

We obtained that according to the GPS data at altitudes of the topside ionosphere (h >300 km) a flare is able to cause a decrease of the electron content. Using the theoretical model it is shown that the intense transport of O+ ions into the above-situated plasma caused by a sharp increase in the ion production rate and thermal expansion of the ionospheric plasma is a cause of the formation of the negative disturbance in the electron concentration in the topside ionosphere.

Key words

Solar flares disturbances ionosphere GPS modeling