observing aircrafts (DC3s) with airborne observatories, large ocean and ice breaking vessels (e. g. RV POLARSTERN) and specialized shelf sea research vessels. The AWI fosters polar and marine science all over [...] Research in Bremerhaven and was the director until 1992. He initiated the construction of the RV Polarstern. He also held the position of director at the Institute of Polar Ecology at the University of Kiel [...] Oceanography Centre, UK, Fieldwork: Participant / group leader in 11 research expeditions, including 6 Polarstern expeditions to the Arctic, Supervision and teaching: Co-supervisor for 2 PhD (current), 1 BSc (2016)