sofia.kuzmina@awi.de
, Bremerhaven

For the past 25 years, the Alfred Wegener Institute has operated a long-term observatory in the Arctic deep sea: the HAUSGARTEN. Located between Greenland and Svalbard, it is where researchers investigate [...] investigate natural and climate-change-related changes in a polar, marine ecosystem – from the ocean’s surface to the seafloor, 5,500 metres below. Many of the observatory’s stations are located below the sea

in the Arctic is expected to rise due to the increase in available light as the sea ice melts, however the role of nutrient limitation is less understood. The inflow of silicic acid into the Arctic Ocean [...] biomass was actively taking up nutrients (Fig. 4). Light limitation is a key driver of central Arctic Ocean primary productivity, regulating C and N uptake, with increasing light being a potential stimulant [...] 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

Research aircraft from the Alfred Wegener Institute have been surveying the ice-covered Arctic Ocean for 30 years. The immense effort of the past 52 expeditions has paid off: 40,000 km of measurement data [...] aeroplane- and helicopter-based measurement series in the world that has been carried out in the Arctic over such a long period. Currently, two Basler BT-67 aircraft are in operation: the Polar 5 and Polar

Vessel POLARSTERN to the Atlantic Ocean in 2014, edited by Rainer Knust and Frank Niessen 695 (2016) The Expedition PS93.1 of the Research Vessel POLARSTERN to the Arctic Ocean in 2015, edited by Ruediger Stein [...] Stein 694 (2016) The Expedition PS92 of the Research Vessel POLARSTERN to the Arctic Ocean in 2015, edited by Ilka Peeken 693 (2015) The Expedition PS93.2 of the Research Vessel POLARSTERN to the Fram [...] The Expeditions PS95.1 and PS95.2 of the Research Vessel POLARSTERN to the Atlantic Ocean in 2015 Edited by Rainer Knust and Karin Lochte with contributions of the participants Berichte zur Polar- und

suitable ice floe, where they will set 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

drifting Observatory for the Study of Arctic Climate) expedition between the autumns of 2019 and 2020. For a year, the research ship drifted through the Arctic, frozen in ice. The goal was to gain a better [...] better understanding of the complex interaction between the ocean, the ice, the atmosphere and the ecosystem. Through the MOSAiC expedition, hundreds of scientists representing institutions from across [...] significant contributions to the global understanding of climate feedback mechanisms in the central Arctic.

amounts of microplastic in arctic sea ice than ever before. However, the majority of particles were microscopically small. The ice samples from five regions throughout the Arctic Ocean contained up to 12,000 [...] patch in the Pacific Ocean, while in turn, the high percentage of paint and nylon particles pointed to the intensified shipping and fishing activities in some parts of the Arctic Ocean. The new study has

reached its destination, will spend the next year drifting through the Arctic Ocean, trapped in the ice. A total of 600 people from 17 countries, who will be supplied by other icebreakers and aircraft [...] MOSAiC Expedition
It could be the largest-scale Arctic research expedition of all time: in September 2019 the German research icebreaker Polarstern will depart from Tromsø, Norway and, once it has reached

Arctic Ocean
The sea ice extent in the Arctic Ocean reached its annual minimum of 4.81 million square kilometres on 12 September 2021. As such, the 2021 Arctic sea-ice minimum comes in at 12th place