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Climate Change

Enhanced warming subtropical ocean is expanding the tropics

Die beobachtete Anomalie der Meeresoberflächentemperatur während der letzten 5 Jahre des Satellitenzeitalters (2015-2019) relativ zu den ersten 5 Jahren des Satellitenzeitalters (1982-1986).
[23. September 2020] 

The alarming expansion of the tropics is not caused by processes in the atmosphere, but quite simply by warming subtropical ocean. AWI scientists have found out.


Arctic Ocean

Arctic sea ice shrinks to second-lowest summer extent since the beginning of satellite observation

Remaining ice cover on the Arctic Ocean measures just 3.8 million square kilometres – warm air and warm seawater have produced widespread melting

Polarstern in der Nähe des Nordpols
[17. September 2020] 

This summer the sea-ice cover on the Arctic Ocean shrank to the second-smallest extent since the beginning of satellite observation in 1979. By mid-September it covered only 3.8 million square kilometres, 0.5 million km² above the all-time low in 2012. 


International Project ISMIP6

Model comparison: Experts calculate future ice loss and the extent to which Greenland and the Antarctic will contribute to sea-level rise

The major international project ISMIP6 offers new estimates of how much melting ice sheets will contribute to global sea-level rise by 2100

Gletscher in Ostgrönland
[17. September 2020] 

Ice-sheet models are an essential tool in making predictions regarding the future of the Greenland and Antarctic Ice Sheets. Nevertheless, these models still have a number of weaknesses. In an international model comparison, 14 research groups fed their ice-sheet models the same atmospheric and ocean data, and calculated what additional amounts of sea-level rise Greenland and the Antarctic would contribute by the year 2100.


Permafrost

Siberia’s permafrost erosion has been worsening for years

River Bank erosion in the Lena Delta is contributing to the greenhouse effect

Seitlicher Blick auf das eisreiche Sobo-Sise Kliff
[16. September 2020] 

The scale of the Riverbank Erosion is alarming: every year, roughly 15 metres of the riverbanks crumble away. In addition, the carbon stored in the permafrost could worsen the greenhouse effect. 


Arctic

MOSAiC aerial campaign: first aerial survey flights in the Arctic since the outbreak of the coronavirus pandemic

German polar research aircraft launch from Svalbard to conduct aerial surveys of the sea ice and atmosphere over the Arctic Ocean

Die Forschungsflugzeuge Polar 6 und Polar 5 sind zum Start der Flugkampagnen in Spitzbergen angekommen.
[31. August 2020] 

Following a five-month mandatory delay due to the coronavirus pandemic, on August 30th the two German polar research aircraft Polar 5 and Polar 6 will launch from Svalbard to conduct their first aerial survey flights over the Arctic this year. The flights, which will extend far into the Central Arctic, will support the investigation of the atmosphere and sea ice, and supplement the MOSAiC expedition’s extensive research agenda.


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