feedbacks between ocean structure and dynamics, sea ice physics, biogeochemistry, and biodiversity of the Arctic Ocean. Organic compounds in the Arctic Ocean and the deep Atlantic Ocean are derived from [...] elucidate, if the amount of dissolved organic compounds in the Arctic Ocean changed over the last decades. We also aim at quantifying the contribution of terrestrial organic matter because it represents [...] the effect of global warming on the occurrence of toxic microalgae and phycotoxins in the Arctic. The Arctic region is heavily impacted by global warming, which has an influence on the growth of planktonic

now flowing more rapidly: this means that they transport more ice from the land’s interior to the ocean, which in turn causes the sea level to rise. Furthermore, the surface of Greenland’s ice sheet is [...] century? Find out more > TRT World Now (Video) | 14.09.2020 Climate Crisis: Ice breaks away from Arctic's largest remaining shelf Find out more > Dialogue & Lectures Lecture | 04.03.2022 The Complex Life [...] Ice Sheets TEDx Talks Talk | 06.03.2017 How the Greenland Ice Sheet is loosing mass forced by the ocean Summit on Climate Change Policy advice

on, aggregation, ecological function and distribution of organic compounds in the changing polar ocean. We aim to understand the function of marine organic compounds, both, as diagnostic markers to decode [...] 2026 In the “FjordChange” project, we are investigating the influence of Atlanticification on the Arctic ecosystem around Spitsbergen. To this end, we are studying four fjords with varying degrees of A [...] of marine life Subtopic 6.3 The future biological carbon pump Subtopic 6.4 Use and misuse of the ocean: Consequences for marine ecosystems Publications of the Section Biological carbon pump Influence of

Polar bear mother and cup in the Arctic ocean Automatic Marine Mammal Mitigation by Infrared Imaging Use of loud seismic airguns and naval sonars in marine surveys is feared to potentially injure whales [...] adjustment. ARK 27.3 Aug - Oct 2012 1563h operational Operation of FIRST-Navy infrared imager in the Arctic Ocean. (+) Successful operation of sensor for entire expedtion without any member of the IR team on [...] hindrance which is less prevalent in off-shore seismic and renewable energy construction settings. Arctic Ocean PS101 Sep-Oct 2016 Ship based operation of FIRST-Navy infrared imager on RV Polarstern. (+) O

provide answers to big questions on polar and global climate change. Future climate change in the Arctic and Antarctic depends on feedbacks governed by small-scale processes: How do the surface fluxes of [...] momentum and particles change as the atmosphere becomes less stable, and as sea ice gives way to open ocean? How do clouds and precipitation change in response to changes in temperature, moisture, circulation

Antarctic ice-bed-ocean interfaces , Nature Communications, 9, doi: 10.1038/s41467-018-04583-0 . Stärz, M. , Jokat, W., Knorr, G. and Lohmann, G. (2017): Threshold in North Atlantic-Arctic Ocean circulation [...] doi: 10.1038/ncomms15867 . Stein, R., Fahl, K., Gierz, P. , Niessen, F. and Lohmann, G. (2017): Arctic Ocean sea ice cover during the penultimate glacial and the last interglacial , Nature Communications [...] , Jokat, W. and Lohmann, G. (2016), Evidence for ice-free summers in the late Miocene central Arctic Ocean , Nature Communications, 7, pp. 1-13, doi: 10.1038/ncomms11148 . Abelmann, A., Gersonde, R. ,

Prof. Dr. Guido Grosse Arctic permafrost landscape dynamics and Earth System feedbacks Permafrost coring in the Fish Creek Delta, North Alaska (Photo: Alfred Wegener Institut) Arctic permafrost landscapes [...] DOCconcentrations, the origin of DOC and the temporal variability in two permafrost regions along the Arctic Ocean. My study areas are the Lena Delta and Bykovsky Peninsula in Siberia, and a transect from Teshekpuk [...] Global warming will continue to warm the Arctic resulting in the degradation of permafrost soils. This leads to large-scale ground subsidence. Vast regions of the Arctic are covered with ice-rich silts containing

sea levels are the two most important cornerstones. We conduct marine geological research in the Arctic and Antarctic to more precisely define the inadequately known advance and retreat behavior of the [...] contributes to better reconstructing the history of global ice sheets and evaluating their influence on ocean circulation and sea level variations. As a result, models for future ice sheet behavior are then to

Observed ocean-ice/snow-atmosphere processes: improved knowledge and existing model shortcomings WP1 will produce integrated knowledge of how sea ice and its snow cover are coupled to oceanic and atmospheric [...] deliver improved understanding of the physical, chemical, and biogeochemical interactions within the Ocean-Ice-Atmosphere (OIA) system, new knowledge of polar and global climate, and enhanced ability of society [...] components and regions (e.g. polar low-latitude interactions/teleconnections) that occur through the ocean and atmosphere. Finally, we use existing and updated model projections to complete a comprehensive

concentrations in the oceans. An example is the relationship between nitrate and phosphate which allows to distinguish between water of Pacific and Atlantic origin in the Arctic. Nutrient data from 1984 [...] zooplankton origin. Monitoring of nutrient dynamics Investigations of the nutrient dynamics in the polar oceans are closely related to biological and hydrographical studies. These basic data are important to study