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Successful series of measurements in Arctic sea ice
Date:8/11/2008

erature, salinity and currents up to the surface. "We are happy and content that we were able to recover and exchange the equipment, considering the extreme ice conditions", says Dr Agnieszka Beszczynska-Mller, oceanographer at the Alfred Wegener Institute. The temperature of the Atlantic water has again slightly decreased compared to the elevated temperatures of the year 2006. This demonstrates the annual variability. All in all, the researchers have observed that the temperature in the Fram Strait has risen about 0,1C each year since 1997.

Premiere for the seaglider

A premiere for the Alfred Wegener Institute was the operation of a seaglider from Polarstern. This is an autonomous vehicle which regularly submerges from the surface to a depth of 1.000 metres. It measures on its dive temperature, salinity, oxygen, opacity of the water, and pressure; then it resurfaces and sends these data via satellite to Bremerhaven. From there, it can obtain new orders, if the results or other conditions require. The seaglider will measure until mid September. Then it will report its location and will presumably be salvaged by Norwegian cooperation partners on board their research vessel KV Svalbard.

Return of Pacific waters near Greenland? The polar water near Greenland, which flows south along the Greenland coast into the Atlantic, consists of water masses of various origins. A part of it originates in the Pacific, which covers the long distance from the Bering Strait through the Arctic Ocean. "We have been documenting this water mass for years near Greenland", says Prof. Gerhard Kattner. "It was almost impossible to provide evidence of it since 2004." This points at a considerable change of the Arctic ocean current system. Current examinations again show a small part of Pacific water. Measurements in the next years will show if this trend is to continue.

The AWI-Hausgarten will be cultivated for another year

The AWI is operating
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Contact: Gerhard Kattner
Gerhard.Kattner@awi.de
49-471-483-1490
Helmholtz Association of German Research Centres
Source:Eurekalert  

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