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A unique ice core is currently being examined in the Alfred Wegener Institute's ice laboratory: the oldest continuous ice core that has ever been drilled on Earth. As part of the EU-funded Beyond EPICA - Oldest Ice project, a research consortium set up a drilling camp on the high plateau in East Antarctica in 2019. Up until January 2025, international teams drilled over 2,800 metres of continuous ice during the Antarctic summer months. This ice core includes air bubbles that enable direct measurements of greenhouse gases from the last 1.2 million years…

On Wednesday, 2 July 2025, the Polarstern will set sail from Tromsø, Norway, embarking on an expedition to the Arctic Ocean. Over the next two months, an international research team will analyse the feedback effects between global warming and sea ice retreat in the Arctic Ocean. The investigations will focus on the differences in the melting of various sea ice types – representing the Arctic of the past decades, the present and the future. A parallel airborne campaign will complement the measurements and, at the outset of the expedition, the Polarstern…

In the last few decades, the Arctic sea ice has receded ever further, including increasingly in winter when the extent of sea ice is at its most prominent. One of the main drivers of this development is thought to be the warming of Atlantic water that flows from Europe’s Norwegian Sea into the Arctic Ocean, passing through the Barents Sea and the Fram Strait in the process. However, not all the Atlantic water flowing into the Barents Sea reaches the sea ice. Part of the Atlantic water recirculates, i.e. by changing direction and flowing back into…

Antarctic krill is a key species in the Antarctic marine ecosystem: it is an important food source for many species, such as whales, seals and penguins. However, the small crustaceans are increasingly becoming the focus of fishing, which can incur significant consequences for the entire Southern Ocean ecosystem. Therefore, concepts that minimize the negative effects of fishing on the krill themselves and on the animals that feed on krill are required urgently. A research team from the Alfred Wegener Institute and the Norwegian Institute of Marine…

The world produces more than 460 million tons of plastic every year. Plastics are made from a wide variety of chemicals and polymers that are almost exclusively derived from fossil fuels. When they end up in the environment, they can cause lasting damage to us humans, the climate and our ecosystems. Plastics can now be found in even the remotest parts of our planet and throughout the human body. One approach currently being advocated as a way out of the crisis is plastic credits. An international consortium of experts, led by Sangcheol Moon of the…

On 29 May 2025, the Polarstern research vessel set sail from Bremerhaven for the Arctic. The destination of the 95 expedition participants, led by the Alfred Wegener Institute, is the AWI Hausgarten, a long-term observatory situated between Svalbard and Greenland. There they will investigate how the ecosystems of the Arctic deep sea are reacting to changing environmental conditions as a result of rapid climate change. The month-long expedition, which is scheduled to finish in Tromsø, Norway, at the end of June, will focus on benthic and plankton…

Temperatures around the world continue to rise – and the North Sea is no exception. Yet, in addition to this gradual warming, increasingly frequent and intense heat events also have consequences for marine organisms. Researchers at the Marine Station Helgoland, a research facility of the Alfred Wegener Institute, have quantified the frequency and intensity of these heatwaves along with their repercussions for plankton. They have also conducted an experiment that exposed the North Sea plankton community to different future warmer scenarios, both with and…

From 1 May 2025, Prof. Dr. Maarten Boersma will step up as Acting Director of the Alfred Wegener Institute. As a biologist, he has been conducting research, predominantly at the Helgoland and Sylt stations, since 2001, since 2015 as section head. He has been on the AWI Board of Directors since summer 2024. Maarten Boersma succeeds Prof. Dr. Antje Boetius, who takes up the position of President of the Monterey Bay Aquarium Research Institute (MBARI) in California.

The winter growth period for sea ice in the Arctic Ocean is now over, with levels at a record low. The winter ice extent on 21 March 2025 was lower than at any time since continuous satellite recording began in 1979. At 14.45 million square kilometres, winter sea ice cover is over a million square kilometres below the long-term average. As in February 2025, average Arctic sea ice cover remained at an all-time low for the entire month of March, equalling the previous low set in 2017. 

The most detailed map of the landscape under the Antarctic ice sheet to date has been created by a team of international scientists under the Head of the British Antarctic Survey (BAS) and with the participation of the Alfred Wegener Institute. The map, called Bedmap3, covers more than six decades of survey data collected by aeroplanes, satellites, ships and even dogsleds. The results will be published this week in the journal Scientific Data.