Sea-ice extents recalculated, starting from 2018!

12 September 2020
Once the errors in our processing routine for calculating the sea-ice extent had been identified and corrected, all time series since 1 May 2018 were recalculated, double-checked and then posted on the website again, from 11 September. Older time series are unaffected by the correction. Comparing the results of different algorithms and questioning the accuracy of their results is part of the scientific process, and of quality control. This news informs you, how satellite algorithms work, why they have to be updated from time to time and why we have to update our data. The updated data and graphs are now online. Read more here… team

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MOSAiC - Multidisciplinary drifting Observatory for the Study of Arctic Climate

It was the largest-scale Arctic research expedition of all time: in September 2019 the German research icebreaker Polarstern departed from Tromsø, Norway and, once it has reached its destination, spent the next year drifting through the Arctic Ocean, trapped in the ice. A total of 600 people from 19 countries, who were supplied by other icebreakers and aircraft, will participated in the expedition – and several times that number of researchers will subsequently use the data gathered to take climate and ecosystem research to the next level. The mission will be spearheaded by the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI). More information about the expedition here.

With we accompanied the MOSAiC expedition with sea-ice-related information and detailed ice maps, and reported on the initial findings. In the course of ten DriftStories, once a month we showcased experts from the expedition’s ICE Team and explored the backgrounds of their research areas. You can continue to find all DriftStories, which offer a closer look at the sea-ice-related work done on site and the relevance of their research for the MOSAIC expedition as a whole, here. has provided regular coverage of the MOSAiC expedition in the form of the Sea Ice Ticker. Though the main focus of the Ticker texts was on fieldwork conducted on all aspects of sea ice, we also explored other topics, especially with regard to new developments, milestones and findings in the context of the MOSAiC drift experiment. The Sea Ice Ticker texts were released once a week and can still be read here.

Sea-ice Development in the Arctic Remains at a Historically Low Level

30 October 2020
This year, the new ice formation is progressing much more slowly due to the marked temperature anomaly over the coastal waters of the Siberian Arctic Ocean, which was not present in the past four decades. Since 14 October, there has been less ice in the Arctic than on any comparable day in October in the last forty-two years. The reason for this significantly delayed process was a marked high-pressure system over Siberia, combined with a low-pressure system over Svalbard. Read more here...


Bert and Pipa – the new social media mascots on

9 October 2020
In 2016 we began a collaboration with the degree programme in Media and Communication Studies at the FU Berlin. One example selected for the collaboration: the information and data platform Ever since, students have worked on the social media channels of in connection with courses at the FU Berlin. Another idea that soon emerged: using a polar bear and penguin as representatives of the two polar regions. The two mascots’ look was iteratively refined by the students, and adapted for their future use online. Read on...