Sea-ice algae The seasonal extent and properties of Arctic ice on land and in the ocean determine the efficacy of the albedo feedback mechanism causing arctic climate amplification. Various ice types are inhabited [...] Sampling and analytical strategy to investigate taxonomic and functional ice algae composition in the ocean and lakes. (Photo: Alfred-Wegener-Institut) High-resolution reconstruction of regional climate changes [...] Interdisciplinary research projects at the interface between natural science and data science Topic A: "Arctic Environmental Data Analytics"– Gregor Pfalz Topic B: "Data fusion using remote sensing data and

roughly two-thirds of global sea-level rise; the remaining third is primarily due to the warming of the oceans, which causes seawater to expand. Accordingly, the development of our planet’s ice sheets and glaciers [...] and that ice-loss processes have been set in motion that will have lasting consequences. In the Arctic, temperatures are rising twice as quickly as the global average; as a result, the Greenland ice sheet’s

of a permafrost landscape How do you imagine an Arctic landscape characterized by permafrost? The answer is visualized by a 3-dimensional print of an Arctic landscape in Northeast Siberia, the Bykovsky Peninsula [...] ‘before-and-after’ lenticular images, together with video and audio recordings from expeditions to the Arctic, will help illustrate the thawing of the permafrost, and the fieldwork involved in investigating [...] ice melts on slopes. As a result, sediments and plant remains are transported into rivers and the ocean, thereby changing the biochemistry of the water. The data were collected by Gonçalo Vieira und Pedro

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

samples. Our focus study areas are Arctic terrestrial systems (Russia, Alaska, Canada) and coastal–marine polar ecosystems (North Pacific & Atlantic, Southern Oceans). We apply metabarcoding (target-specific

International Ocean Color Coordination Group. www.ioccg.org/reports/IOCCG_Report_15_2014.pdf / S. Sathyendranath (editor) , Dartmouth, Nova Scotia, B2Y 4A2, Canada., International Ocean-Colour Coordinating [...] V., Bracher, A., Ramon, D., Sathyendranath, S., Kutser, T., eds. (2020). Colour and Light in the Ocean. Lausanne: Frontiers Media SA. doi: 10.3389/978-2-88963-421-7 2018 Heim B., Juhls B., Abramova E. [...] Bracher A., Doerffer R., Goncalves-Araujo R., hellmann S., Kraberg A., Martynov, Overduin P. (2019) Ocean Colour Remote Sensing in the Laptev Sea. In: Barale V., Gade M. (eds) Remote Sensing of the Asian

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

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

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

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. ,