While the long-term effect of solar spectral irradiance (SSI) of the UV and longer wavelength on the Earth climate system has been studied in detail in the past (Gray et al., 2010), the effect of particle precipitation on the Earth's atmosphere and climate has only recently received increasing attention. For example, while it is known that solar energetic particles influence the ozone concentration in the stratosphere (Lilensten et al., 2015), its long-term effects on the Earth's climate are however less understood. Also, the solar cycle variation of the EUV radiation influences the neutral and electron density in the thermosphere. There is indication that this effect also has potential impacts on the lower atmosphere. In this session we invite contributions that discuss latest results in these fields.

References:
Gray, L. J., et al., 2010: Solar influences on climate. Rev. Geophys., 48, RG4001, doi:10.1029/2009RG000282.
Lilensten, J., T. Dudok de Wit, and K. Matthes, eds., 2015: Earth’s climate response to a changing Sun. EDP Sciences, Les Ulis Cedex A, France, 345 pp., ISBN 978-2-7598-1733-7.