Blar i Geophysical Institute på forfatter "Østerhus, Svein"

Viser treff 1-18 av 18

    • Circulation and water masses beneath the northern Ronne Ice Shelf, Antarctica 

      Nicholls, Keith W.; Makinson, Keith; Østerhus, Svein (Journal article, 2004-12-14)
      We present oceanographic data from beneath the northern Ronne Ice Shelf. The data were collected during the austral summer of 2002–2003 from four sites located near the ice front in the Ronne Depression. They consist of ...

    • Correction to “Sea ice velocity in the Fram Strait monitored by moored instruments” 

      Widell, K.; Østerhus, Svein; Gammelsrød, Tor (Peer reviewed; Journal article, 2003-12-11)

    • Direct measurements of the mean flow and eddy kinetic energy structure of the upper ocean circuletion in the NE Atlantic 

      Knutsen, Øyvind; Svendsen, Harald; Østerhus, Svein; Rossby, Tom; Hansen, Bogi (Journal article, 2005-07-19)
      The upper ocean circulation in the sub-polar northeast Atlantic has been a challenge to quantify due to strong and variable wind-forcing, and strong and variable deep currents that lead to large uncertainties in the use ...

    • Effect of critical latitude and seasonal stratification on tidal current profiles along Ronne Ice Front, Antarctica 

      Makinson, Keith; Schröder, Michael; Østerhus, Svein (Journal article, 2006-03-30)
      The ice front region of Ronne Ice Shelf lies near the critical latitude of the semidiurnal M2 tide, the principal tidal constituent in the southern Weddell Sea. Here the Coriolis frequency almost equals the M2 tidal ...

    • Greenland-Scotland overflow studied by hydro-chemical multivariate analysis 

      Fogelquist, E.; Blindheim, J.; Tanhua, Toste; Østerhus, Svein; Buch, E.; Rey, Francisco (Peer reviewed; Journal article, 2003-01)
      Hydrographic, nutrient and halocarbon tracer data collected in July-August 1994 in the Norwegian Sea, the Faroe Bank Channel (FBC), the Iceland and Irminger Basins and the Iceland Sea are resented. Special attention was ...

    • Ice shelf water overflow and bottom water formation in the southern Weddell Sea 

      Foldvik, Arne; Gammelsrød, Tor; Østerhus, Svein; Fahrbach, E.; Rohardt, G.; Schröder, Michael; Nicholls, Keith W.; Padman, L.; Woodgate, R. A. (Peer reviewed; Journal article, 2004-02-17)
      Cold shelf waters flowing out of the Filchner Depression in the southern Weddell Sea make a significant contribution to the production of Weddell Sea Bottom Water (WSBW), a precursor to Antarctic Bottom Water (AABW). We ...

    • The Iceland–Faroe inflow of Atlantic water to the Nordic Seas 

      Hansen, Bogi; Østerhus, Svein; Hátún, Hjalmar; Kristiansen, Regin; Larsen, Karin Margretha Húsgarð (Peer reviewed; Journal article, 2003-12)
      The flow of Atlantic water between Iceland and the Faroe Islands is one of three current branches flowing from the Atlantic Ocean into the Nordic Seas across the Greenland–Scotland Ridge. By the heat that it carries along, ...

    • Interannual variability and ventilation timescales in the ocean cavity beneath Filchner-Ronne Ice Shelf, Antarctica 

      Nicholls, Keith W.; Østerhus, Svein (Peer reviewed; Journal article, 2004-04-20)
      Multiyear time series of ocean current and temperatures from beneath Filchner-Ronne Ice Shelf, Antarctica, demonstrate both seasonal and interannual variability. The seasonal signal is visible at all measurement sites, ...

    • Measured volume, heat, and salt fluxes from the Atlantic to the Arctic Mediterranean 

      Østerhus, Svein; Turrell, William R.; Jónsson, Steingrímur; Hansen, Bogi (Journal article, 2005-04-07)
      The flow of warm and saline Atlantic water towards the Arctic crosses the Greenland-Scotland Ridge in three current branches. Since the mid 1990's, extensive monitoring with quasi-permanent moorings and regular CTD cruises ...

    • Observational evidence for on-shelf heat transport driven by dense water export in the Weddell Sea 

      Darelius, Elin Maria K.; Daae, Kjersti; Dundas, Vår Iren Hjorth; Fer, Ilker; Hellmer, Hartmut H.; Janout, Markus; Nicholls, Keith W.; Sallée, Jean-Bapiste; Østerhus, Svein (Journal article; Peer reviewed, 2023)
      The transport of oceanic heat towards the Antarctic continental margin is central to the mass balance of the Antarctic Ice Sheet. Recent modeling efforts challenge our view on where and how the on-shelf heat flux occurs, ...

    • Observations of highly regular oscillations in the overflow plume downstream of the Faroe Bank Channel 

      Geyer, Florian; Østerhus, Svein; Hansen, Bogi; Quadfasel, D. (Peer reviewed; Journal article, 2006-12-23)
      The Faroe Bank Channel (FBC) is the deepest connection between the Atlantic Ocean and the Nordic Seas. This work describes the dynamic properties of the plume of dense overflow water descending from the Faroe Bank Channel ...

    • Observing Antarctic Bottom Water in the Southern Ocean 

      Silvano, Alessandro; Purkey, Sarah; Gordon, Arnold L.; Castagno, Pasquale; Stewart, Andrew L.; Rintoul, Stephen R.; Foppert, Annie; Gunn, Kathryn L.; Herraiz-Borreguero, Laura; Aoki, Shigeru; Nakayama, Yoshihiro; Naveira Garabato, Alberto C.; Spingys, Carl; Akhoudas, Camille Hayatte; Sallée, Jean-Baptiste; de Lavergne, Casimir; Abrahamsen, E. Povl; Meijers, Andrew J. S.; Meredith, Michael P.; Zhou, Shenjie; Tamura, Takeshi; Yamazaki, Kaihe; Ohshima, Kay I.; Falco, Pierpaolo; Budillon, Giorgio; Hattermann, Tore; Janout, Markus A.; Llanillo, Pedro; Bowen, Melissa M.; Darelius, Elin Maria K.; Østerhus, Svein; Nicholls, Keith W.; Stevens, Craig; Fernandez, Denise; Cimoli, Laura; Jacobs, Stanley S.; Morrison, Adele K.; Hogg, Andrew McC.; Haumann, F. Alexander; Mashayek, Ali; Wang, Zhaomin; Kerr, Rodrigo; Williams, Guy D.; Lee, Won Sang (Journal article; Peer reviewed, 2023)
      Dense, cold waters formed on Antarctic continental shelves descend along the Antarctic continental margin, where they mix with other Southern Ocean waters to form Antarctic Bottom Water (AABW). AABW then spreads into the ...

    • On the seasonal signal of the Filchner overflow, Weddell Sea, Antarctica 

      Darelius, Elin Maria K.; Strand, Kjersti Opstad; Østerhus, Svein; Gammelsrød, Tor; Årthun, Marius; Fer, Ilker (Peer reviewed; Journal article, 2014)
      The cold ice shelf water (ISW) that formed below the Filchner–Ronne Ice Shelf in the southwestern Weddell Sea, Antarctica, escapes the ice shelf cavity through the Filchner Depression and spills over its sill at a rate of ...

    • Sea ice velocity in the Fram Strait monitored by moored instruments 

      Widell, K.; Østerhus, Svein; Gammelsrød, Tor (Peer reviewed; Journal article, 2003-10-04)
      The Fram Strait sea ice velocity was measured by means of a new method using moored Doppler Current Meters in the period 1996–2000. Almost 3 years of ice velocity observations near 79N 5W are analyzed. The average southward ...

    • Structure and Forcing of Observed Exchanges across the Greenland–Scotland Ridge 

      Bringedal, Carina; Eldevik, Tor; Skagseth, Øystein; Spall, Michael A.; Østerhus, Svein (Peer reviewed; Journal article, 2018)
      The Atlantic meridional overturning circulation and associated poleward heat transport are balanced by northern heat loss to the atmosphere and corresponding water-mass transformation. The circulation of northward-flowing ...

    • Upstream sources of the Denmark Strait Overflow: Observations from a high-resolution mooring array 

      Harden, Benjamin E.; Pickart, Robert S.; Valdimarsson, Héðinn; Våge, Kjetil; de Steur, Laura; Richards, Clark; Bahr, Frank; Torres, Dan; Børve, Eli; Jónsson, Steingrímur; Macrander, Andreas; Østerhus, Svein; Håvik, Lisbeth; Hattermann, Tore (Peer reviewed; Journal article, 2016)
      We present the first results from a densely instrumented mooring array upstream of the Denmark Strait sill, extending from the Iceland shelfbreak to the Greenland shelf. The array was deployed from September 2011 to July ...

    • Water mass modification over the continental shelf north of Ronne Ice Shelf, Antarctica 

      Nicholls, Keith W.; Padman, L.; Schröder, Michael; Woodgate, R. A.; Jenkins, Adrian; Østerhus, Svein (Journal article, 2003-08-13)
      We use new data from the southern Weddell Sea continental shelf to describe water mass conversion processes in a formation region for cold and dense precursors of Antarctic Bottom Water. The cruises took place in early ...

    • Wind stress mediated variability of the Filchner Trough overflow, Weddell Sea 

      Daae, Kjersti; Darelius, Elin Maria K.; Fer, Ilker; Østerhus, Svein; Ryan, S. (Peer reviewed; Journal article, 2018-05-06)
      The Filchner Trough (FT) is a key site for exchange of water masses between the Weddell Sea continental shelf and the deep ocean. Cold and dense Ice Shelf Water (ISW), a precursor for Antarctic Bottom Water, flows north ...