conducted at the Potsdam division of AWI, and the group is ranked as the first in Europe and as one of the best in the world. The achievements of this research group are outstanding. The boundary-layer [...] 2011, the review panel met with the extended Directorate of the AWI for a briefing about the organisation and the goals of the AWI centre review and PACES mid-term evaluation. During these talks, the review [...] to provide the review panel with a comprehensive overview of the research at the AWI. The posters summarized the missions, methods and results of each of the twenty scientific sections and the Junior Research

growth of world population up to about 9 billion people by the middle of the 21st century and the management of its consequences is one of the central challenges facing humankind. Above all, the declining [...] evidence to test models of the evolution of northern, continuous permafrost since the beginning of the glacial/interglacial cycles is needed. The application of state of the art geophysical sounding [...] • Construction of scenarios of possible future developments; this needs knowledge about the dynamics of the systems, the role of different driving forces, and the options available in the future. We will