The variability of the Sun is well established, as well as that of the Earth’s climate. To what extent the two are connected, in the sense that solar variability drives climate, is the subject of considerable research and, in some cases, controversy. After an earlier workshop at the International Space Science Institute (ISS!) on Solar Composition and its Evolution, two ofthe participants came up with the idea to initiate a similar project on the topic of Solar Variability and Climate, a work­ shop aimed at obtaining an overview of the current knowledge of the variability of the Sun and of the Earth’s Climate, and of their possible connections. A further, equally important objective was the strengthening of the interaction between the two, often diverse communities of solar physicists and climatologists. ISSI took up this idea and invited six convenors, E. Friis-Christensen, C. Froh­ lich, J. Haigh, J. Hansen, M. Schussler, and S. Solanki, who subsequently formu­ lated the aims and goals of the workshop, nominated a list of invitees, drafted a programme of introductory talks, and structured the workshop into three sections. For each section there was a concluding discussion session moderated by two co­ chairs. Moreover, there was a number of contributed poster papers for which there were two viewing sessions. The main intent of this format was to leave ample time for open, informal discussions, which is one of the principal aims of ISSI.

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