In this focus point we present three approaches, which touch upon a few topics. We are sure that our choice is
covering just a subset of open questions and other equally important aspects have been disregarded. Our aim, however, is not to be complete or inclusive of all the aspects influencing the climate’s behavior. It is, instead, to present to the community of physicists the current thinking about climate and its behavior, in the hope that an open debate on this journal will start about climate as a physical system. In this endeavor we decided to ask three prominent scientists to outline their opinion and views.
For further information read the Editorial.