Bloggar

Kort film från expeditionen Petermann 2015 som visar hur forskarna gör för att skapa en karta över havsbotten.

Onboard the Oden we have the RV Skidbladner, a 6.4 m long aluminum boat equipped with a bow mounted high-resolution multibeam echo sounder and sub-bottom profiler.

An ice shelf is a floating glacier. Most ice shelves are formed as extensions of one or several ice streams that drain glaciers and large ice sheets by transporting ice to the ocean.

After passing the sea ice clogged passage at the southern end of Nares Strait, the transit to Petermann Fjord went quite fast.

After leaving Thule Air Base we had a smooth ride up to Smith Sound in Nares Strait where sea ice clogged the entire passage northward. This happened somewhere around 78°30’N.

After two nights in Kangerlussuaq I think we know the town. But we certainly do not know the amazing surrounding nature!

All of the scientific crew that will take part in the Petermann Glacier 2015 expedition will travel to Greenland tomorrow in order to meet up with Oden in Thule.

We reached the sea ice edge over the Lomonosov Ridge at about 85°N 20 September. This location is only 15 nautical miles south from where we crossed the Lomonosov Ridge in 1996 during my first expedition to the Arctic Ocean.

The work in the area of the southern Lomonosov Ridge comprised the last part of the SWERUS-C3 Leg 2 cruise plan. The main idea with this working area, called Box 4, was to link all the research we had done on the shallow shelf to the deep Arctic Ocean setting.

We have now completed our shelf transects along the East Siberian Sea shelf following the Leg 2 cruise plan. Who could ever dream of that we would be able to complete all that we wrote into the cruise plan? But the fact is that we have! A big part of this success is due to the extremely light sea ice conditions we have experienced.

We reached the Arlis Plateau during the evening on September 1st. The planned multibeam survey could start directly.

Instead of sea ice, the wind became our main challenge. Near gale force every second day.

First days of surveys in the working area north of Wrangel Island is now over. Our Russian colleagues have completed some long successful survey lines using their electromagnetic system. We are very pleased how well this has worked and excited to eventually see the data over Herald Canyon when it has been processed.

We departed from Barrow according to plan, just after 09:00 local time. The remaining food supplies arrived by boat during the morning. During the entire night, our team responsible for the so called “mid-water sonar” had been busy with calibration procedures.

During the evening 19th August, the Swedish Polar Research Secretariat had arranged so we could vote in the Swedish election, which will take place September 14 when Leg 2 of SWERUS-C3 is still ongoing.

The weather here in Barrow is very good with calm wind. The weather is in fact extremely important for the rotation. The weather could easily become our Achilles' heel!