Lower Tertiary volcanic rocks off Kristiansund — Mid Norway     

Tom Bugge  Tore Prestvik  Kåre Rokoengen 《Marine Geology》1980,35(4):277-286

Grab samples from the Norwegian continental shelf show that diapiric structures occurring within a sequence of Mesozoic and Tertiary sediments represent volcanic rocks consisting of porphyritic olivine-nephelinite. The KAr age of 55.7 ± 0.9 m.y. shows that the area affected by Lower Tertiary magmatism in the North Atlantic region also included the continental shelf off Mid Norway. The highly undersaturated nature of these volcanic rocks, however, indicates that they are unlikely to be closely related to the widespread tuff horizons of the same age known from the North Sea.  相似文献   

Salmon lice, Lepeophtheirus salmonis (Kroyer), infestation in sympatric populations of Arctic char, Salvelinus alpinus (L.), and sea trout, Salmo trutta (L.), in areas near and distant from salmon farms     

Bjorn  Pal Arne; Finstad  Bengt 《ICES Journal of Marine Science》2002,59(1):131-139

  相似文献   

A giant three-stage submarine slide off Norway   总被引：8，自引：0，他引：8  

Tom Bugge  Stein Befring  Robert H. Belderson  Tor Eidvin  Eystein Jansen  Neil H. Kenyon  Hans Holtedahl  Hans Petter Sejrup 《Geo-Marine Letters》1987,7(4):191-198

One of the largest submarine slides known, The Storegga Slide, is located on the Norwegian continental margin. The slide is up to 450 m thick and has a total volume of about 5,600 km3. The headwall of the slide scar is 290 km long and the total run-out distance is about 800 km. The slide involved sediments of Quaternary to Early Tertiary age and occurred in three stages. Earthquakes combined with decomposition of gas hydrates are believed to be the main triggering agents for the slides. The first slide event is tentatively dated to be about 30,000 to 50,000 years B.P. and the two last major events are dated to be at 6,000 to 8,000 years B.P.  相似文献   

Influence of seismic shooting on the lesser sandeel (Ammodytes marinus)     

Hassel  Arne; Knutsen  Tor; Dalen  John; Skaar  Kristian; Lokkeborg  Svein; Misund  Ole Arve; Ostensen  Oivind; Fonn  Merete; Haugland  Eli Kyrkjebo 《ICES Journal of Marine Science》2004,61(7):1165-1173

  相似文献   

Exposure of phytoplankton to ekofisk crude oil     

Kjetill Østgaard  Ingvar Eide  Arne Jensen 《Marine environmental research》1984,11(3):183-200

Solutions of Ekofisk crude oil in sea water were prepared by slow stirring for 21h in a closed system. Headspace and GC/MS techniques were applied to establish dose composition and levels. The standardized test medium produced in a closed system contained approximately 14 mg oil per litre and was dominated by low molecular weight aromatic hydrocarbons and phenols.The toxicity of the standarized oil-containing medium to three marine diatoms was studied in a cage culture turbidostat and by conventional batch culture technique. The three algal species differed in sensitivity to the oil compounds, but showed identical ranking in both test systems.Standardized test medium diluted to 50% with respect to oil content stopped the growth of the most sensitive alga, Skeletonema costatum. For comparison naphthalene was applied and gave 50 % growth reduction at a concentration of 400 μg litre^?1. The growth of Chaetoceros ceratosporum was only slighty affected by the full strength standard test medium, which had no influence on the growth of Phaeodactylum tricornutum, the least sensitive organism. The presence of an oil layer on the surface of the standard test medium during the growth test greatly increased its toxicity and blocked completely the photosynthesis even of P. tricornutum after 4 days.  相似文献   

What is good for the fishermen, is good for the nation: co-management in the Norwegian fishing industry in the 1990s     

Bjrn Hersoug  Stein Arne Rnes 《Ocean & Coastal Management》1997,35(2-3)

This paper analyses the concept of ‘co-management’ and tries to explain why co-management has recently become important to different types of fisheries administration. A preliminary analytical framework is sketched, before going on to describe the Norwegian co-management system, known as ‘centrally directed consultation’, where fishermen's representatives are established on a wide range of organisations that exert a direct influence on fisheries policy, including not only quota management but grant aid, sales, research and education. The final section is devoted to the lessons that may be learned from the Norwegian experience, bearing in mind the particular background of Norway and its historical setting.  相似文献   

The behaviour of spawning herring in relation to a survey vessel     

Skaret  Georg; Axelsen  Bjorn Erik; Nottestad  Leif; Ferno  Anders; Johannessen  Arne 《ICES Journal of Marine Science》2005,62(6):1061-1064

  相似文献   

3rd International Energy Forum in Hamburg,Germany, 22–23 November 1990     

Arne Walther 《GeoJournal》1990,22(2):210-210

Reports

3rd International Energy Forum in Hamburg, Germany, 22–23 November 1990Meeting of leading experts to discuss the role of the Energy Industries in the Europe of the Future  相似文献   

T-matrix approach to shale acoustics   总被引：2，自引：0，他引：2  

Morten Jakobsen  John A. Hudson  Tor Arne Johansen 《Geophysical Journal International》2003,154(2):533-558

  相似文献   

Permafrost in Svalbard: a review of research history, climatic background and engineering challenges   总被引：3，自引：0，他引：3  

Ole Humlum  Arne Instanes  Johan Ludvig Sollid 《Polar research》2003,22(2):191-215

This paper reviews permafrost in High Arctic Svalbard, including past and current research, climatic background, how permafrost is affected by climatic change, typical permafrost landforms and how changes in Svalbard permafrost may impact natural and human systems. Information on active layer dynamics, permafrost and ground ice characteristics and selected periglacial features is summarized from the recent literature and from unpublished data by the authors. Permafrost thickness ranges from less than 100 m near the coasts to more than 500 m in the highlands. Ground ice is present as rock glaciers, as ice-cored moraines, buried glacial ice, and in pingos and ice wedges in major valleys. Engineering problems of thaw-settlement and frost-heave are described, and the implications for road design and construction in Svalbard permafrost areas are discussed.  相似文献