Blar i Geophysical Institute på forfatter "Nicholls, Keith W."

Viser treff 1-8 av 8

    • 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 ...

    • Hydrography and circulation in the Filchner Depression, Weddell Sea, Antarctica 

      Darelius, Elin Maria K.; Makinson, Keith; Daae, Kjersti Birkeland; Fer, Ilker; Holland, Paul R.; Nicholls, Keith W. (Peer reviewed; Journal article, 2014)
      Cold and dense ice shelf water (ISW) emerging from the Filchner-Ronne Ice Shelf cavity in the southwestern Weddell Sea flows northward through the Filchner Depression to eventually descend the con- tinental slope and ...

    • 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 ...

    • 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, ...

    • 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, ...

    • Observed vulnerability of Filchner-Ronne Ice Shelf to wind-driven inflow of warm deep water 

      Darelius, Elin Maria K.; Fer, Ilker; Nicholls, Keith W. (Peer reviewed; Journal article, 2016-08-02)
      The average rate of melting at the base of the large Filchner-Ronne Ice Shelf in the southern Weddell Sea is currently low, but projected to increase dramatically within the next century. In a model study, melt rates ...

    • 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 ...

    • 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 ...