(Building D). In 2004 the headquarter of AWI moved to Fischereihafenschleuse and a new building by Otto Steidle had been built at Am Handelshafen. In January 2005, Polar 4 was severely damaged during a rough landing at the British overwintering station Rothera on the Antarctic Peninsula. As it was impossible to repair the plane, the aircraft had to be decommissioned. Since then, scientific and logistical tasks of polar flights have been performed by Polar 2. After years of preparation Alfred Wegener Institute conduct up from September 2019 the international arctic expedition MOSAiC 2019-2020, which was one of the largest research actions of its kind. About 600 scientist from more than 20 countries worked at different task in extrem circumstances. The research action had a budget of 140 million Euros. Also no other polar research trip was exploited as much in the media as the MOSAiC expedition since then. The Alfred Wegener Institute increased its press department before and during the expedition, hired a "Communications Manager MOSAiC" and an own photographer to feed “MOSAiC” channels on Twitter and Instagram. At the beginning, the AWI focus was o set up the complex infrastructure for research in the Arctic and Antarctic regions. In addition to international prestige, the territorial claim to resources from terrestrial and maritime areas was one of the reasons for Germany for the cost-intensive work of Alfred Wegener Institute. Climatologists and geophysicists at AWI recognized the fatal effects of global warming in the most affected geographical areas in the 1980this early on, but gained less attention outside the scientific community. In the 1990s, the mainly geophysical-oceanographic research was expanded to include the biological aspects of polar and deep-sea habitats, among other things. From the 2000s, the problem of climate change reached the consciousness of German society and the politics that funded the AWI. The focus and promotion of the institus work get adopted to the debate about global change. Current projects had often also the aim to research special aspect of climate change and the effectes of global warming especially to the polar regions. With the director Boetius, the public relations and the marketing of the polar research were pushed forward. Research The institute has three major departments: Climate System Department, which studies oceans, ice and atmosphere as physical and chemical systems. Biosciences Department, which studies the biological processes in marine and coastal ecosystems. Geoscientific Department, which studies climate development,