experiments. Large scale circulation changes as captured by anthropogenic tracers Contact: Michael Karcher The Arctic Ocean surface circulation is characterized by the Transpolar Drift, which carries [...] paths through the Arctic. Such a tracer is 129 Iodine, an anthropogenic radionuclide which is dumped as waste into the Irish Sea and the North Sea by nuclear reprocessing facilities. Measuring the

that influence seafloor morphology and sediment dynamics and anthropogenic influences, such as the use of bottom-contact fishing gear. Acoustic methods further allow us to look beneath the seabed and

extremes and whether there is a difference between natural and anthropogenic impact on Siberian hydrology by comparison of early Holocene and recent warming phases. To answer these questions sediment cores [...] similar temporal resolution, if achievable, to disentangle the anthropogenic and natural contribution. For investigations, primarily diatom-δ18O will be used to establish hydrological time-series and detect

(still) prohibited under the Antarctic Treaty. Hence few anthropogenic acoustic sources exist in this region while the sea ice cover absorps sound more efficiently than the open water surface, reducing [...] further. Spectrogram of 20060829-2207_PALAOA (Photo: OZA AWI) Anthropogenic sound Ship noise Polarstern in sea ice (Photo: AWI) Twice a year, the German research vessel Polarstern visits the Atka bay to

Double-Trouble investigates the influence of global warming and anthropogenic pollution on the structure and functioning of the Central Arctic food web under current and future environmental conditions.

sustainMare research mission, is developing concepts for reducing anthropogenic stresses on marine ecosystems and biodiversity. The project brings together 32 experts from 15 institutes, whose goal is to

information will be used to attribute the relative importance of anthropogenic activity and natural phenomena on the marine ecosystem and biogeochemical cycling of the Southern Oceans during the last decades

continue to do so, and more quickly. This is chiefly due to anthropogenic climate change. The warmer atmosphere is heating the ocean, causing seawater to expand. In addition, glaciers around the globe [...] cause. What the future looks like will above all depend on anthropogenic greenhouse-gas emissions. According to the IPCC’s climate projections, if emissions can be cut rapidly, the sea level will still

for future net primary production, and time of emergence of anthropogenically induced trends in dissolved organic matter in Earth system model simulations. I am currently developing a benchmarking scheme

of global environmental processes; they are also subject to anthropogenic use. Though the strains on them are especially apparent in coastal regions and shelf seas, where densely settled cities and