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Dissemination - Arctic Climate Change,
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Key figures


WP6 leader

Nathalie Sennechael has a backgroung in Physical Oceanography (doctor of the University Pierre et Marie Curie (UPMC)  and is  scientist at the MNHN -National Museum of Natural History- in Paris. Recently she has been increasingly involved in outreach activities. She is the ACCESS webmaster.


 WP6 co-leader

Oystein Godoy has a background in meteorology and oceanography from University of Bergen. He has been working with remote sensing techniques at the Norwegian Meteorological Institute since 1994. In recent years he has been increasingly involved in data management activities e.g. for the EU project DAMOCLES and in operational data access during IPY.


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Information on:

 The current status of Arctic sea ice



Polarstern cruise ARK-XXVII/3 in 2012


The expedition ARK-XXVII/3 (IceArc, 02 Aug – 08 Oct 2012) of the German ice breaker RV Polarstern was a highly interdisciplinary cruise to the Arctic Ocean. Main focus of the cruise was the consequences of the retreating sea-ice cover for the Arctic Ocean and its ecosystems.

Click here to enlarge Figure 1.



Sea-ice thickness was measured with airborne electromagnetic induction sounding (EM-bird) during flights with more than 3500 km of profile data. These data show similar sea-ice thickness distributions than during a similar cruise in 2011, but significantly thinner sea ice than a decade ago. More large-scale sea-ice observations were obtained from regular bridge observations during the entire voyage through the sea ice, following an international standard protocol. Sea-ice sampling by means of ice cores was conducted during all 9 sea-ice stations (Fig. 1) in close cooperation with all groups on board.



 Click here to enlarge Figure 2.

In total 385 cores were drilled to be analyzed for a large variety of physical, biological, and geo-chemical parameters at each ice station (Fig. 2).


Station time was between 30 and 72 hours. The first ice station was re-visited after 7 weeks of free drift, covering the transition from summer melt to autumn freeze-up. Autonomous stations recorded successfully different components of the sea-ice energy- and mass balance and meteorological conditions. In order to obtain more time-series data of sea-ice and oceanographic conditions, also beyond the cruise, a variety of buoys was deployed in cooperation with different partners of the International Arctic Buoy Program.


 Click here to enlarge Figure 3.



Studies of the ice-underside and the uppermost ocean under the sea ice were performed with a remotely operated vehicle (ROV). The ROV was launched from the sea ice and for 38 dives (Fig. 3), in particular, light conditions under sea ice were mapped. These data show significant differences between different ice types as well as the spatial variability of organisms and biomass under sea ice.







Andreas Herber, Thomas Krumpen, Marcel Nicolaus and Rüdiger Gerdes

- 01/02/13