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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

When was the buoy deployed and how far did it travel? As part of a German-Russian-American collaboration (project name: NABOS / TRANSDRIFT / TICE), the buoy designated 2018T52 was deployed in the Russ

The mean sea-ice extent for March 2021 in the Arctic was 14.72 million square kilometres (Fig. 1), placing it ca. 504,000 square kilometres above the record low from 2017 and ca. 620,000 square kilome

When German coastal researchers head for the North Sea this May to measure the nutrient load in the water and, for the first time, whenever they use a scientific instrument, it is automatically record

A time-lapse video of the MOSAiC expedition – a one-of-a-kind sequence compiled using a selection from ca. 2.5 million radar images. One of these systems was kept running nonstop throughout the MOSAiC

Not until the end of the month did the sea-ice extent substantially decline, dropping below two standard deviations from the average for the period 1981 – 2010. At the same time, the summer solstice w

Within a matter of days, the extent decreased by ca. 490,000 km² (an area roughly the size of Spain) and briefly dipped below the record low from 2012 and near last year’s level. However, from 8 July