. Under conditions of further warming and acidification of the ocean, Atlantic cod and its arctic relative polar cod would be forced to look for new habitats in the far north. Their populations could [...] disastrous, as the polar cod is the most important food source for Arctic seals and seabirds. In addition, fishers could lose the world’s most productive area for catching Atlantic cod, located to the north

mankind, is exceedingly difficult. The study of atmospheric, open ocean, deep sea or even processes in shallow coastal waters require sustained long-term observations often deploying sophisticated, costly [...] jointly generate a particularly large set of time series, in the Arctic, Antarctic as well as the North Sea. These data are used in the context of AWI research programmes, but also in a range of external [...] III) Infrasound (Neumayer-Station III) Biology North Sea Arctic (Fram and Svalbard) Antarctic Oceanography Arctic Time series Antarctic time series Terrestrial time series Samoylov Bayelva

Long Term Observations Surface Meteorology in the Arctic (AWIPEV Research Base in Ny-Ålesund, Spitsbergen) Ny-Ålesund from above. (Photo: Alfred Wegener Institut) Ny-Ålesund is located on [...] fjord at the west coast of Svalbard (Spitsbergen). In this region, ocean currents from lower latitudes impact the sea water temperature, and the ocean is a heat storage affecting the local climate. Although Ny-Ålesund is situated in the high Arctic (78.9°N, 11.9°E), daily mean temperature in summer is above the freezing point. The interannual temperature variability in winter

to various factors such as warming, nutrient deficiency or ocean acidification, by focusing on one of the most sensitive areas on Earth, the subarctic and Arctic Ocean. Thereby, we contribute to [...] emission scenarios. Firstly, as a greenhouse gas, rising CO 2 causes ocean warming: temperatures of the surface waters have already increased by 1.1°C on average, while some regions like the Arctic Ocean [...] from CO 2 : As much of the anthropogenic CO 2 is taken up by the ocean, concentrations of CO2 and bicarbonate increase while the concentration of carbonate ions and the pH decrease, also known as 'Ocean

energy budget and the biological activity in the ice & the upper ocean. Radiation stations determine the fraction of incident light which is reflected by the surface or transmitted through ice & snow. [...] environmental change. The towed high resolution camera system OFOS (Ocean Floor Observing System) is used to index megafauna and plastic litter on the Arctic sea floor. ROV To observe the sea-ice system [...] Platform Sinking particles control CO2 transport to the deep ocean. AWI and MARUM researchers developed the BioOptical Platform BOP, which combines a camera system and gel traps to differentiate

biological carbon pump) are linked in the present-day and future Arctic ocean, as well as to which extent this relationship is driven by differences between functional groups (i.e. species shifts) and [...] carbonate chemistry parameters in the Fram Strait and the Central Arctic Ocean. To monitor such parameters in the ocean, it is common practice to analyze discrete water samples obtained e.g. by rosette [...] sensors are designed and calibrated to perform in temperate oceans and thus, the Arctic represents a challenging environment that lies outside the configuaration of most sensors. Hence, in order to

up the research camp for their one-year-long drift through the Arctic Ocean. Consequently, one of the most important milestones in the expedition has been reached ahead of schedule, and before the Polar

Forecast of Sea Ice Conditions The state of the Arctic climate system is rapidly changing. These changes are impacting ecosystems, coastal communities, and economic activities. High-quality [...] concentration, ice thickness from SMOS, snow depth) as well as ocean observations (sea-surface temperature) to optimize the initial state of the sea ice-ocean system for short-term (up to 6 days) [...] . However, this approach neglects all feedback of the sea ice-ocean system onto the atmosphere. This year (2015) the initial state of the sea ice-ocean model has been constrained by sea-ice observations

The role of clouds and warm air masses from the open ocean for the rapid warming of the Arctic is at the heart of a recent Alfred Wegener Institute project on Svalbard. The researchers are

exposure will be studied in East Siberia along a transect from the Arctic Ocean to the Lake Baikal. The objectives of the project are to: (i) Reconstruct (a) mean interglacial temperatures at the southern [...] Meyer Funding: Leverhulme Grant Changes of water isotopes in Arctic Sea ice, Ocean, and atMosphere (CiASOM) (2021-2024) The main goal of the Changes of water isotopes in Arctic Sea ice, Ocean, and [...] is to provide a comprehensive description of the present-day Arctic water cycle and related key exchange processes between the atmosphere, ocean, and sea ice, using both instrumental data and climate