Weekly Reports Polarstern

The Expedition PS115/2 Longyearbyen - Bremerhaven

The overall goal of the geoscience program of the six-weeks Expedition PS115/2 (”Polarstern Arctic Ocean Paleoceanography – PArcOP”)  is to enhance our insights into the tectonic evolution, climate history and related sedimentary processes in the Central Arctic Ocean, based on seismic reflection and marine-geological data. These new data will contribute to a better understanding of the link between tectonics and climate changes in the Arctic. The key objectives of the marine-geological research program of Expedition PS115/2 are (1) high-resolution studies of Quaternary changes in paleoclimate, especially circum-Arctic ice sheets, sea-ice cover, and surface- and deep-water characteristics and (2) detailed reconstructions of the long-term climate history of the Arctic Ocean during Cenozoic times. Seismic data acquisition will be carried out across the central and southern part of the Lomonosov Ridge, supplementing the profiles obtained during Polarstern Expedition PS87 in 2014. The new seismic data will provide new insights into the tectonic and sedimentary evolution of the Arctic Ocean and the adjacent continental shelves. Furthermore, ocean bottom seismometers will be deployed to monitor micro-earthquakes in the Gakkel-Ridge area.

In addition to the geoscientific key objectives, smaller supplementary studies will be carried out, dealing with (1) the measurements on & sampling of sea ice, melt ponds and open-water areas; (2) the deployment of drift buoys to automatically record position, air pressure and surface-water temperature, and (3) detailed radiosounding activity. Last but not least, a “Floating University” will be held on board Polarstern as part of the International Research Training Group “ArcTrain” (Processes and impacts of climate change in the North Atlantic Ocean and the Canadian Arctic) qualification and education program.

PS109 - Weekly Report No. 1 | 12 - 17 September 2017

The forerunners of Greenland

[19. September 2017] 

In the evening of 12 September the research icebreaker R/V Polarstern left the port of Tromsø (Norway). On board there are scientists from seven nations who cover the range from physical oceanography, geochemistry, glaciology, geodesy, geology, geophysics, atmospheric physics and chemistry as well as marine biology and  biogeochemistry. The aim of the “Greenland ice sheet/ocean interaction” (GRISO) expedition is to unravel the complex physical interactions between the ocean and the ice sheet of Northeast Greenland, as well as their implications for...

PS108 - Weekly Report No. 2 | 29 August - 6 September 2017

New technical possibilities in the deep sea

[08. September 2017] 

The second week of our expedition was in focus of the in ROBEX new developed robotic systems.

PS108 - Weekly Report No. 1. | 22 - 28 August 2017

Expedition „ROBEX-DM“

[31. August 2017] 

On Tuesday August 22 at 19:00 POLARSTERN left Tromsö with an unusual freight on board into direction of Svalbard. Unusual, because 10 of the 40 scientists on board are space experts and special are also the new and innovative robotic systems, which should improve our capabilities in deep-sea research. The new technologies include 3 different types of benthic crawler, each designed for its specific scientific purpose on the bottom of the sea, a glider for water column studies, unmanned aerial vehicles (UAVs) to support AUV operations under sea ice and an...

PS107 - Wochenbericht Nr. 3 | 7. - 13. August 2017

Long-term investigations & catching micro plastics

[14. August 2017] 

We finished our scientific program in the western Fram-Strait at the East-Greenland slope and went back to our main research area of the long-term observatory LTER-HAUSGARTEN – west off Svalbard. Like every summer here we realize an extensive sampling program from the sea-surface through the water column down to the seafloor. Here we are analyzing at almost twenty stations within water depth between 200 m and 5500 m seawater, plankton is caught, deep-sea sediments are sampled and photos and videos from the seafloor were made. By a...

PS107, 2nd weekly report | 31 July - 6 August 2017

How to find an eddy

[07. August 2017] 

On HAUSGARTEN cruises we typically study and sample the oceanographic conditions and the biological communities on a relatively large scale. Consecutive stations are often separated by 20-40 km or more. However, many important processes and physical-biological interactions take place on much smaller spatial scales. In order to show how new measurement and sampling techniques capable of achieving a high horizontal resolution in combination with interdisciplinary cooperation can study such small scale processes, we decided to launch a complementary...