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International cooperation

Argentinian Ambassador visits the AWI

The Argentinian Ambassador (2nd from left) visited the AWI.
[16. November 2018] 

On Friday the Argentinian Ambassador S.E. Edgardo Malaroda visited the Alfred Wegener Institute together with the Embassy Secretary Martin Suaya.


Arctic

Massive meteorite impact crater discovered

Kilometre-wide iron meteorite proven beneath Greenland’s ice-sheet with AWI’s research aircraft Polar 6

Close-up of the northwestern ice-sheet margin in Inglefield Land. The Hiawatha impact crater was discovered beneath the semi-circular ice margin. The structure is also imprinted on the shape of the ice surface, even though it lies nearly 1000 meters below the ice surface. Hiawatha is named after outlet glacier at the edge of the ice sheet. The name was given by Lauge Koch in 1922 during an expedition around northern Greenland, while thinking of the pre-colonial native American leader and co-founder of the Iroquois Confederacy.
[15. November 2018] 

An international research team has discovered a 31-km wide meteorite impact crater buried beneath the ice-sheet in northern Greenland. This is the first time that a crater of any size has been found under one of Earth’s continental ice sheets. The research aircraft Polar 6 from the Alfred Wegener Instittue verified the discovery with radar measurements. The research is described in a new study just published in the internationally recognized journal Science Advance.


Expedition starts

Research icebreaker Polarstern begins the Antarctic season

What does it look like below the ice shelf of the calved massive iceberg A68?

Das Forschungsschiff Polarstern des Alfred-Wegener-Instituts verlässt seinen Heimathafen Bremerhaven.
[07. November 2018] 

Due to retarded work on the Polarstern the departure is delayed - On Sunday, 11 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa. This will mark the beginning of its Antarctic season, in which oceanographic fieldwork in the Weddell Sea, a resupply mission to the Neumayer Station III, and explorations of the Larsen C ice shelf region and the South Shetland Islands are on the agenda. The ship is expected to return to Bremerhaven in June 2019.

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Antarctic

Far fewer lakes below the East Antarctic Ice Sheet than previously believed

AWI researchers recently assessed subglacial lakes detected by satellite, and found very little water. But if that’s the case, what is the source of the East Antarctic Ice Sheet’s massive ice streams?

During the Antarctic summer of 2013/14 AWI experts used radar to survey Recovery Glacier from on board the research aeroplane Polar 6
[07. November 2018] 

In the course of an extensive Antarctic expedition, researchers from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research recently investigated several lakes beneath Recovery Glacier that had been previously detected by satellite remote sensing. The experts found very few substantial bodies of water, which is a surprising result.


New Study

Close links between Europe and the Arctic

In addition to warm-air intrusions in the Arctic, the clouds there play an important part in shaping our weather and climate

Wolken über arktischem Meereis in der Framstraße.
Clouds above arctic sea ice in the Fram Strait

Fotos von der Polarstern-Expedition ARK-XXVII-1 im Sommer 2012 (14. Juni - 15. Juli 2012, Bremerhaven-Longyearbyen); 
Forschungsschwerpunkte: 

Ozeanografie: Projekt ACOBAR - Messung von Salzgehalt, Sauerstoff und Wassertemperatur an 80 Stationen entlang eines Schnittes bei 78°50' N;

Biologie: Netzfänge und Sedimentprobennahme an den Stationen; Amphipoden-Untersuchungen (PECABO); Beobachtungen von Seevögeln und Meeressäugern; 

engl: 

Photo taken by Sebastian Menze during the Polarstern expedition ARK-XXVII-1 in summer 2012 into the Fram Strait, duration: 14th June - 15th July 2012
[29. October 2018] 

Warm, moist air masses from the lower latitudes are the main energy source for the Arctic atmosphere in winter; they have a significant influence on soil temperatures and can produce sea-ice melting. Because climate and weather models still have considerable difficulties when it comes to accurately depicting key processes involved in the transformation of these air masses, AWI researchers recently summarised the current state of knowledge and identified remaining gaps; their study has just been released in the journal Nature Geoscience.

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