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In April 2017, sea-ice physicist Stefanie Arndt from the Alfred Wegener Institute in Bremerhaven proved once again that necessity is the mother of invention: she and her colleagues were wondering how

The sea-ice extent in the Antarctic is slowly but surely nearing its seasonal minimum, which we expect to see roughly a month from now. With 3.36 million km² of pack ice covering the Antarctic contine

The air temperature, humidity, pressure and wind fields determine the circulation, and with it, the inflow of warm air masses from the temperate latitudes. In addition, the ocean temperature is the mo

In January 2020 the mean sea-ice extent was 13.42 million km², i.e., ca. 0.97 million km² below the long-term average for the month (see Figures 1 and 2). In January the ice cover in the Arctic showed

Summary Current predictions by international forecast centres and researchers, collected and evaluated by the Sea Ice Drift Forecast Experiment (SIDFEx), suggest that there is a chance that the drift

The MOSAiC expedition, the ultimate drift experiment through the Arctic in winter, has been underway since the 20th of September 2019. Its goal: to improve our understanding of the Arctic climate syst

The stratosphere is the part of our atmosphere beginning at an altitude of ca. 10 km, and where, thanks to the absorption of the trace gas ozone, temperatures rise with increasing altitude. Normally,

While the summer minimum was reached in the Antarctic on 19 February 2020 (at 2.68 million km²), in the Arctic the extent has been growing steadily since the end of February, and hasn’t yet reached it

The standard unit used for the sea-ice volume is thousands of cubic kilometres, and offers a better measure of the state of Arctic sea ice than the extent, since the volume includes the thickness of t

On 4 March 2020, the Arctic sea-ice extent reached its winter maximum at 14.98 million km² and has been steadily declining ever since. The value is now hovering near the bot-tom limit of two standard