The Danish Continental Shelf Project is presently preparing for a cruise with the Swedish icebreaker Oden
to the area north of Greenland.
The logistical conditions in the area are very challenging both for the ship and the equipment. Ice thickness up to 5 metres can be expected with pressure ridges up to 20 metres thick. The Russian nuclear icebreaker 50 let Pobedy
(50 Years of Victory) - which is the most powerful icebreaker class available - will therefore support the expedition to ensure that the area of interest can be reached.
The data coverage of the area of interest in relation to the United Nations Convention on the Law of the Sea (UNCLOS) article 76 is very sparse. This cruise will therefore concentrate on the acquisition of bathymetric, gravity and seismic data.
Oden will be equipped with a new and very advanced multi-beam equipment
equipment financed by Swedish research funding. The seismic equipment to be used is presently being developed in cooperation with the Department of Earth Science, University of Aarhus based on experience gained under previous seismic data acquisition in ice filled waters by the University of Bergen, the Alfred-Wegener-Institute in Bremerhaven and the U.S.Geological Survey (USGS).
The Swedish icebreaker Oden
The cruise, which has been named LOMROG (Lomonosov Ridge off Greenland), is a cooperation with several Swedish institutions and is part of the International Polar Year (IPY).
The Swedish Polar Research Secretariat
will head the cruise with Martin Jakobsson from Stockholm University (e-mail:
) and Christian Marcussen from GEUS (e-mail:
) as principal investigators.
Cooperation with the Canadian Continental Shelf Project will be continued during the LOMROG cruise as under the Lorita-1 expedition
in April 2006. The Canadian project will cosponsor the acquisition of one seismic line. Furthermore it is planned to acquire bathymetric data on the Canadian side of the Lomonosov Ridge.
Proposed plan for Oden 2007 cruise (LOMROG):
Red star: proposed rendezvous position of Russian nuclear icebreaker and Oden
Green lines: seismic profiles
White linies: multibeam profiles
Yellow stars: geological sampling positions (piston corer) and CTD
Red dots: CTD positions
Installation of the new multi-beam equipment is expected to take place at a shipyard in Landskrona (Sweden) from mid-April to May 15. A visit to Copenhagen is planned for May 16. Thereafter Oden will leave for Svalbard via Tromsø in Norway. The LOMROG cruise is expected to start August 12 from Tromsø in Norway and return to Longyearbyen on Svalbard August 17.
The LOMROG 2007 cruise has its own web site.
Brief description of other Danish research during the Oden cruise in 2007
A Danish project from the Greenland Institute of Natural Resources is associated to the LOMROG 2007 cruise.
Greenland Institute of Natural Resources, Nuuk, Greenland
Contact person: Professor Søren Rysgaard, e-mail:
The aim is to investigate and quantify the importance of sea ice in transporting carbon dioxide from the atmosphere to the ocean in areas with different types of sea ice. Furthermore, recent discoveries of anoxic conditions and bacterial denitrification/anammox activity in sea ice show that sea ice may play an important role in the removal of nitrogen. More investigations from multi-year sea ice are, however, needed to increase our understanding of its significance in the arctic and its role in the global nitrogen cycle. Furthermore, sea ice formation may play a far more important role in transporting carbon dioxide (CO2) from the atmosphere to the ocean than previously assumed.
Preliminary studies on first-year sea ice from NE Greenland and N Canada have indicated that ice growth during winter rejects large amounts of CO2, which sink together with dense brine to intermediate and deep water layers. Subsequent sea ice melt during summer enhances the uptake of CO2 from the atmosphere, as the resulting melt-water is undersaturated with respect to CO2. As the transport mechanism is dependent on sea ice formation, future decrease in global sea ice cover may reduce the oceanic capacity for taking up atmospheric CO2.