Although today the Arctic is a hotspot of climate change, data sampling is still sparse due to the large sea ice cover. Yet both the historical and the modern observational data are important for long-term climate [...] database contains almost 290.000 quality checked oceanographic profiles for the Arctic Mediterranean north of 65°N in the time period 1980-2015. It thus represents a unique tool to study long-term changes

for Coastal and Arctic Seas: The aim of the project is the establishment of a long-term observation network of automated sensors on buoys, gliders etc. Focus area is the North Sea, but a prototype of the [...] :SAHFOS runs the Continuous Plankton Recorder surveys, that initially concentrated on the North Sea and North Atlantic (in operation since the 1930s) but CPRs are now deployed in many regions of the world [...] n here. HOTS : Hawai Ocean Time series: Time series operated at the open ocean site ALOHA in the North Pacific Subtropical Gyre. hahana.soest.hawaii.edu/hot/hot_jgofs.html I IACS : International

coasts of our seas have always been a natural and constant companion for the inhabitants. However, due to the climate crisis, they can increase dramatically and get out of hand. With rising sea levels and [...] an increase in extreme storms, severe erosion is taking place on many coasts - not only in the North Sea, but also in the Mediterranean. The island of Djerba, a popular vacation destination in Tunisia [...] activities. The Project objectives At the AWI with the Biological Institute Helgoland and the Wadden Sea Station Sylt as well as the University of Sfax in Tunisia, researchers are working on slowing down

Impact of sea ice decline and changing silicic acid availability on Central Arctic primary productivity Antonia Thielecke1, Jeffrey Krause2, Natasha Bryan1, Lena Eggers1, Mar Fernández-Méndez1 1Alfred [...] 1Alfred Wegener Institute, Germany; 2Dauphin Island Sea Lab, USA Antonia.thielecke@awi.de References 1 Hátún, H., Azetsu-Scott, K., Somavilla, R., Rey, F., Johnson, C., Mathis, M., Mikolajewicz, U., Coupel, P [...] S.V., Salter, I., Ólafsson, J., 2017. The subpolar gyre regulates silicate concentrations in the North Atlantic. Sci Rep 7, 14576. doi.org/10.1038/s41598-017-14837-4 2 Orkney, A., Platt, T., N

also been polluting our oceans since the industrialization of the world. Coastal seas such as the North and Baltic Seas in particular have been and continue to be exposed to countless chemical inputs. [...] a particular focus is on the effects of toxic munition compounds on the marine environment of our seas. Team Dr. Matthias Brenner M.Sc. Romina Schuster Projects CONAMR-C MUNIMAP REMARCO CONMAR RecorD We

Ocean and its neighboring oceans. The unique geometry of the Arctic—surrounded by the land masses of North America, Greenland and Siberia—has encouraged researchers to make a joint effort to enclose the Arctic [...] calculated to better understand the Arctic Ocean’s role on the carbonate system. Figure 2: Net oceanic and sea ice FW transport (m3s-1) time series. The transport estimate during 2004-2010 will be quantified under [...] Fram Strait, respectively; the Institute of Marine Research (IMR) in Bergen, Norway for the Barents Sea Opening (BSO); and the University of Alaska Fairbanks (UAF) in the US and Arctic and Antarctic Research

zoologists of the 19th century, who became known for his ecological work on oyster beds in the North Frisian Wadden Sea and coined the term "biocenosis". His concept of ecological living communities was grou [...] research and was frequently visiting the island of Helgoland for his morphological-physiological work on sea algae. In 1860 he was appointed as a full member of the Berlin Academy of Sciences. Pringsheim was [...] founded, which established a small field station for oyster research and the exploration of the Wadden Sea on the Island of Sylt in 1924.

rotating gyres of the Ross and Weddell Seas. Heat losses to the atmosphere, interactions with the adjacent ice shelves, and salt enrichment by brine ejected from freezing sea ice result in very dense water masses [...] mean wind field. The deep water masses upwelling in the Antarctic Divergence, sucked in from their North Atlantic source regions, are partly driven northward near the surface towards the northern flank of [...] masses which run down the continental slope towards the deep sea floor. The newly formed and well ventilated bottom water underrides, steered by bottom topography, the ACC to fill the deep basins of the

provision: Markus Brand (Heligo.) Max Schwanitz (Bremerh.) Diving operations management: (Heligoland, North Sea, Arctic) Markus Brand Max Schwanitz Miriam Lienkämper Scientific projects, Heligoland & AWIPEV: [...] Project directorate: Detlef Wilde Technical project lead: Jan Meier Other Expeditions Land expeditions north: Dirk Mengedoht Verena Mohaupt Land expeditions south: Christine Wesche Other ship expeditions: Derk

causes and consequences of sea ice melt in three contrasting sea-ice regimes as functions of atmospheric and oceanographic conditions: 1) seasonal sea ice, mostly originating from Russian shelf regions and [...] observed sea ice, ocean, and ecosystem changes in the Central Arctic Ocean during melt season. We will investigate the causes and consequences of differences in sea ice melt in three contrasting sea-ice e [...] ice zone 2) first- and second year sea ice from the central Arctic Ocean, drifting along the transpolar drift system, and 3) multi-year ice in the “last ice area” north of Greenland. The overall objective