Browsing Brage IMR by Author "Ingvaldsen, Randi Brunvær"

Now showing items 1-20 of 33

    • Acoustic scattering layers reveal a faunal connection across the Fram Strait 

      Gjøsæter, Harald; Ingvaldsen, Randi Brunvær; Christiansen, Jørgen Schou (Peer reviewed; Journal article, 2020)
      Acoustic scattering layers (SL) at various depths are common phenomena in most oceans, but the organisms that make up these layers vary and so does their density, and hence the backscattered energy. During two crossings ...

    • Arctic continental slopes sharp gradients of physical processes affect pelagic and benthic ecosystems. 

      Bluhm, Bodil; Janout, Markus; Danielson, Seth L.; Ellingsen, Ingrid H.; Gavrilo, Maria; Grebmeier, Jaqueline; Hopcroft, Russell R.; Iken, Katrin; Ingvaldsen, Randi Brunvær; Jørgensen, Lis Lindal; Kosobokova, Ksenia N.; Kwok, Ron; Polyakov, Igor V.; Renaud, Paul E.; Carmack, Eddy C. (Peer reviewed; Journal article, 2020)
      Continental slopes – steep regions between the shelf break and abyssal ocean – play key roles in the climatology and ecology of the Arctic Ocean. Here, through review and synthesis, we find that the narrow slope regions ...

    • Atlantic cod (Gadus morhua)feeding over deep water in the high Arctic 

      Ingvaldsen, Randi Brunvær; Gjøsæter, Harald; Ona, Egil; Michalsen, Kathrine (Peer reviewed; Journal article, 2017)

    • Atlantic Water Pathways Along the North-Western Svalbard Shelf Mapped Using Vessel-Mounted Current Profilers 

      Menze, Sebastian; Ingvaldsen, Randi Brunvær; Haugan, Peter M.; Fer, Ilker; Sundfjord, Arild; Beszczynska-Moeller, Agnieszka; Falk-Petersen, Stig (Journal article; Peer reviewed, 2019)
      A large amount of warm Atlantic water (AW) enters the Arctic as a boundary current through Fram Strait (West Spitsbergen Current [WSC]) and is the major oceanic heat source to the Arctic Ocean. Along the north‐western ...

    • Benthic transition zones in the Atlantic gateway to a changing Arctic ocean 

      Jørgensen, Lis Lindal; Pecuchet, Laurene; Ingvaldsen, Randi Brunvær; Primicerio, Raul (Peer reviewed; Journal article, 2022)
      The biogeographic transition from boreal to Arctic marine communities entails a strong taxonomic and functional turnover. Communities living in these areas are being strongly affected by climate warming with rapid ...

    • Borealization of the Arctic Ocean in response to anomalous advection from sub-Arctic seas. 

      Polyakov, Igor V.; Alkire, Mattew; Bluhm, Bodil; Brown, Kristina; Carmack, Eddy C.; Chierici, Melissa; Danielson, Seth L.; Ellingsen, Ingrid H.; Ershova, Elizaveta; Gardfeldt, Katrin; Ingvaldsen, Randi Brunvær; Pnyushkov, Andrey V.; Slagstad, Dag; Wassmann, Paul (Peer reviewed; Journal article, 2020)
      An important yet still not well documented aspect of recent changes in the Arctic Ocean is associated with the advection of anomalous sub-Arctic Atlantic- and Pacific-origin waters and biota into the polar basins, a process ...

    • Climate change dynamics and mercury temporal trends in Northeast Arctic cod (Gadus morhua) from the Barents Sea ecosystem 

      Bank, Michael; Ho, Quang Tri; Ingvaldsen, Randi Brunvær; Duinker, Arne; Nilsen, Bente Merete; Måge, Amund; Frantzen, Sylvia (Peer reviewed; Journal article, 2023)
      The Northeast Arctic cod (Gadus morhua) is the world's northernmost stock of Atlantic cod and is of considerable ecological and economic importance. Northeast Arctic cod are widely distributed in the Barents Sea, an ...

    • Climate-Relevant Ocean Transport Measurements in the Atlantic and Arctic Oceans 

      Berx, Barbara; Volkov, Denis; Baehr, Johanna; Baringer, Molly O.; Burmeister, Kristin; Cunningham, Stuart; De Jong, Marieke Femke; de Steur, Laura; Dong, Shenfu; Frajka-Williams, Eleanor; Goni, Gustavo J.; Holliday, N. Penny; Hummels, Rebecca; Ingvaldsen, Randi Brunvær; Jochumsen, Kerstin; Johns, William; Jónsson, Steingrímur; Kieke, Dagmar; Krishfield, Richard; Lankhorst, Matthias; Larsen, Karin Margetha H.; Le Bras, Isabela; Lee, Craig M.; Li, Feili; Macrander, Andreas; McCarthy, Gerard; Moat, Ben I.; Moritz, Martin; Perez, Renellys C.; Polyakov, Igor; Proshutinsky, Andrey; Rabe, Berit; Rhein, Monika; Schmid, Claudia; Skagseth, Øystein; Smeed, David A.; Timmermans, Mary-Louise; von Appen, Wilken-Jon; Williams, Bill; Woodgate, Rebecca; Yashayaev, Igor; Brandt, Peter; Lozier, Susan; Mertens, Christian; Karstensen, Johannes (Peer reviewed; Journal article, 2021)
      Ocean circulation redistributes heat, freshwater, carbon, and nutrients all around the globe. Because of their importance in regulating climate, weather, extreme events, sea level, fisheries, and ecosystems, large-scale ...

    • A deep scattering layer under the North Pole pack ice 

      Snoeijs-Leijonmalm, Pauline; Gjøsæter, Harald; Ingvaldsen, Randi Brunvær; Knutsen, Tor; Korneliussen, Rolf; Ona, Egil; Skjoldal, Hein Rune; Stranne, Christian; Mayer, Larry; Jakobsson, Martin; Gårdfeldt, Katarina (Peer reviewed; Journal article, 2021)
      The 3.3 million km2 marine ecosystem around the North Pole, defined as the Central Arctic Ocean (CAO), is a blind spot on the map of the world’s fish stocks. The CAO essentially comprises the permanently ice-covered deep ...

    • Diversity and seasonal development of large zooplankton along physical gradients in the Arctic Barents Sea 

      Engeland, Tom Van; Bagøien, Espen; Wold, Anette; Cannaby, Heather Anne; Majaneva, Sanna Kristiina; Vader, Anna; Rønning, Jon S.; Handegard, Nils Olav; Dalpadado, Padmini; Ingvaldsen, Randi Brunvær (Peer reviewed; Journal article, 2023)
      Due to ongoing climate change, a new Arctic Ocean ecosystem is emerging. Within the framework of the Nansen Legacy project, we investigated the community composition of the large zooplankton and its seasonal development ...

    • Environmental controls on macrozooplankton and fish distributions over diurnal to seasonal time scales in the northern Barents Sea 

      Cannaby, Heather Anne; Ingvaldsen, Randi Brunvær; Lundesgaard, Øyvind; Renner, Angelika; Skaret, Georg; Sakinan, Serdar S.; Chierici, Melissa; Gjøsæter, Harald (Peer reviewed; Journal article, 2023)
      We present acoustic observations obtained by bottom mounted echosounders at two locations in the northern Barents Sea and a third on the northern continental slope of the Barents Sea. Data collected over a period of ...

    • Evidence of diel vertical migration of mesopelagic sound-scattering organisms in the Arctic 

      Gjøsæter, Harald; Wiebe, Peter H.; Knutsen, Tor; Ingvaldsen, Randi Brunvær (Peer reviewed; Journal article, 2017)

    • Faster Atlantic currents drive poleward expansion of temperate phytoplankton in the Arctic Ocean 

      Oziel, L.; Baudena, A.; Ardyna, M.; Massicotte, Philippe; Randelhoff, Achim; Sallée, Jean-Bapiste; Ingvaldsen, Randi Brunvær; Devred, E.; Babin, Marcel (Peer reviewed; Journal article, 2020)
      The Arctic marine biome, shrinking with increasing temperature and receding sea-ice cover, is tightly connected to lower latitudes through the North Atlantic. By flowing northward through the European Arctic Corridor (the ...

    • Fish assemblages at the Yermak Plateau and in northern Svalbard waters during the period 2012-2020 

      Gjøsæter, Harald; Ingvaldsen, Randi Brunvær; Hallfredsson, Elvar Halldor; Johannesen, Edda (Peer reviewed; Journal article, 2023)
      During several surveys covering the north-western and northern Svalbard waters, and the deeper Yermak Plateau north of Svalbard during the period 2012–2020, 291 standardized hauls with a demersal trawl were made. All fishes ...

    • Fish assemblages at the Yermak Plateau and in northern Svalbard waters during the period 2012–2020 

      Gjøsæter, Harald; Ingvaldsen, Randi Brunvær; Hallfredsson, Elvar Halldor; Johannesen, Edda (Peer reviewed; Journal article, 2023)
      During several surveys covering the north-western and northern Svalbard waters, and the deeper Yermak Plateau north of Svalbard during the period 2012–2020, 291 standardized hauls with a demersal trawl were made. All fishes ...

    • Fluctuating Atlantic inflows modulate Arctic atlantification 

      Polyakov, Igor V.; Ingvaldsen, Randi Brunvær; Pnyushkov, Andrey V.; Bhatt, Uma S.; Francis, Jennifer A.; Janout, Markus; Kwok, Ronald; Skagseth, Øystein (Peer reviewed; Journal article, 2023)
      Enhanced warm, salty subarctic inflows drive high-latitude atlantification, which weakens oceanic stratification, amplifies heat fluxes, and reduces sea ice. In this work, we show that the atmospheric Arctic Dipole (AD) ...

    • High Latitude Epipelagic and mesopelagic scattering layers-a reference for future Arctic ecosystem change 

      Knutsen, Tor; Wiebe, Peter H.; Gjøsæter, Harald; Ingvaldsen, Randi Brunvær; Lien, Gunnar (Peer reviewed; Journal article, 2017)

    • Impact of multiple stressors on sea bed fauna in a warming Arctic 

      Jørgensen, Lis Lindal; Primicerio, Raul; Ingvaldsen, Randi Brunvær; Fossheim, Maria; Strelkova, Natalia; Thangstad, Trude Hauge; Manushin, Igor; Zakharov, Denis (Journal article; Peer reviewed, 2019)
      The Arctic Barents Sea is experiencing a record temperature increase, a poleward shift in the distributions of commercial fish stocks, and invasion by the snow crab, a new predator. To evaluate benthic community vulnerability ...

    • Ocean acidification state variability of the Atlantic Arctic Ocean around northern Svalbard 

      Jones, Elizabeth Marie; Chierici, Melissa; Menze, Sebastian; Fransson, Agneta; Ingvaldsen, Randi Brunvær; Lødemel, Helene Hodal (Peer reviewed; Journal article, 2021)
      The Svalbard shelf and Atlantic Arctic Ocean are a transition zone between northward flowing Atlantic Water and ice-covered waters of the Arctic. Effects of regional ocean warming, sea ice loss and greater influence of ...

    • Origin of marine invertebrate larvae on an Arctic inflow shelf 

      Descoteaux, Raphaelle; Huserbråten, Mats Brockstedt Olsen; Jørgensen, Lis Lindal; Renaud, Paul Eric; Ingvaldsen, Randi Brunvær; Ershova, Elizaveta; Bluhm, Bodil (Peer reviewed; Journal article, 2022)
      Many benthic invertebrate taxa possess planktonic early life stages which drift with water currents and contribute to dispersal of the species, sometimes reaching areas beyond the current ranges of the adults. Until recently, ...