Now showing items 21-40 of 440

    • Asynchronous Antarctic and Greenland ice-volume contributions to the last interglacial sea-level highstand 

      Rohling, E.J.; Hibbert, F.D.; Grant, K.M.; Galaasen, Eirik Vinje; Irvali, Nil; Kleiven, Helga Flesche; Marino, G.; Ninnemann, Ulysses S; Roberts, A.P.; Rosenthal, Y.; Schulz, H.; Williams, F.H.; Yu, J. (Peer reviewed; Journal article, 2019-11-06)
      The last interglacial (LIG; ~130 to ~118 thousand years ago, ka) was the last time global sea level rose well above the present level. Greenland Ice Sheet (GrIS) contributions were insufficient to explain the highstand, ...
    • Atlantic Ocean thermohaline circulation changes on orbital to suborbital timescales during the mid-Pleistocene 

      Kleiven, Helga (Kikki) Flesche; Jansen, Eystein; Curry, W. B.; Hodell, David A.; Venz, K. A. (Peer reviewed; Journal article, 2003-02-19)
      Mid-Pleistocene benthic ∂18O and ∂13C time series from the North Atlantic site 983 and Ceara Rise site 928 are compared to an array of existing isotopic records spanning the Atlantic basin and the geographic extremes of ...
    • Atmosphere-driven ice sheet mass loss paced by topography: Insights from modelling the south-western Scandinavian Ice Sheet 

      Åkesson, Henning; Morlighem, Mathieu; Nisancioglu, Kerim Hestnes; Svendsen, John-Inge; Mangerud, Jan (Peer reviewed; Journal article, 2018-09)
      Marine-terminating glaciers and ice streams are important controls of ice sheet mass balance. However, understanding of their long-term response to external forcing is limited by relatively short observational records of ...
    • Atmospheric circulation over Europe during the Younger Dryas 

      Rea, B.R.; Pellitero, R.; Spagnolo, M.; Hughes, P.D.; Ivy-Ochs, S.; Renssen, Hans; Ribolini, A.; Bakke, Jostein; Lukas, S.; Braithwaite, R.J. (Journal article; Peer reviewed, 2020)
      The Younger Dryas (YD) was a period of rapid climate cooling that occurred at the end of the last glaciation. Here, we present the first palaeoglacier-derived reconstruction of YD precipitation across Europe, determined ...
    • Axial and transverse deep‐water sediment supply to syn‐rift fault terraces: Insights from the West Xylokastro Fault Block, Gulf of Corinth, Greece 

      Cullen, Timothy M; Collier, Richard E.L.I.; Gawthorpe, Rob; Hodgson, David M.; Barrett, Bonita J (Peer reviewed; Journal article, 2019)
      Deep‐water syn‐rift systems develop in partially‐ or transiently‐linked depocentres to form complicated depositional architectures, which are characterised by short transport distances, coarse grain sizes and a wide range ...
    • Basement highs: definitions, characterisation and origins 

      Peacock, David; Banks, Graham (Journal article; Peer reviewed, 2020)
      A glossary of commonly used terms related to the geometric forms and geological settings of basement highs is presented to assist cross-disciplinary understanding, qualifying prefixes for the term basement are discussed ...
    • Basement structure and its influence on the structural configuration of the northern North Sea rift 

      Fazli Khani, Hamed; Fossen, Haakon; Gawthorpe, Robert; Faleide, Jan Inge; Bell, Rebecca E. (Peer reviewed; Journal article, 2017-06)
      The northern North Sea rift basin developed on a heterogeneous crust comprising structures inherited from the Caledonian orogeny and Devonian postorogenic extension. Integrating two‐dimensional regional seismic reflection ...
    • Basin-scale architecture of deeply emplaced sill complexes: Jameson Land, East Greenland 

      Eide, Christian Haug; Schofield, Nick; Jerram, Dougal Alexander; Howell, John Anthony (Peer reviewed; Journal article, 2016)
      Igneous sills are common components in rifted sedimentary basins globally. Much work has focused on intrusions emplaced at relatively shallow palaeodepths (0 – 1.5 km). However, owing to constraints of seismic reflection ...
    • Building up or out? Disparate sequence architectures along an active rift margin-Corinth rift, Greece 

      Gawthorpe, Rob; Andrews, Julian E.; Collier, Richard E.L.I.; Ford, Mary; Henstra, Gijs Allard; Kranis, Haralambos; Leeder, Mike R.; Muravchik, Martin; Skourtsos, Emmanuel (Peer reviewed; Journal article, 2017-12)
      Early Pleistocene synrift deltas developed along the southern Corinth rift margin were deposited in a single, dominantly lacustrine depocenter and were subject to the same climate-related base-level and sediment supply ...
    • Cambrian (Series 3 - furongian) conodonts from the alum shale formation at Slemmestad, Oslo region, Norway 

      Kleppe, Katarina Skagestad; Nakrem, Hans Arne; Stouge, Svend (Peer reviewed; Journal article, 2018-05-09)
      Nine samples from the Alum Shale of Slemmestad, Oslo Region, were processed for conodonts. The limestone-rich interval extending from the mid Cambrian Paradoxides paradoxissimus trilobite Zone to the Lower Ordovician ...
    • Can we use ice sheet reconstructions to constrain meltwater for deglacial simulations? 

      Bethke, Ingo; Li, Camille; Nisancioglu, Kerim Hestnes (Peer reviewed; Journal article, 2012)
      Freshwater pulses from melting ice sheets are thought to be important for driving deglacial climate variability. This study investigates challenges in simulating and understanding deglacial climate evolution within this ...
    • Causality from palaeontological time series 

      Hannisdal, Bjarte; Liow, Lee Hsiang (Peer reviewed; Journal article, 2018-07)
      As custodians of deep time, palaeontologists have an obligation to seek the causes and consequences of long‐term evolutionary trajectories and the processes of ecosystem assembly and collapse. Building explicit process ...
    • Causes of bias and uncertainty in fracture network analysis 

      Peacock, David; Sanderson, David J.; Bastesen, Eivind; Rotevatn, Atle; Storstein, Tor H (Peer reviewed; Journal article, 2019-04-24)
      Fault and fracture networks are analysed to determine the deformation history and to help with such applications as engineering geology and fluidflow modelling. These analyses rely on quantifying such factors as length, ...
    • The Cenozoic western Svalbard margin: sediment geometry and sedimentary processes in an area of ultraslow oceanic spreading 

      Amundsen, Ingrid Marie Hasle; Blinova, Maria; Hjelstuen, Berit Oline; Mjelde, Rolf; Haflidason, Haflidi (Peer reviewed; Journal article, 2011-04-17)
      The northeastern high-latitude North Atlantic is characterised by the Bellsund and Isfjorden fans on the continental slope off west Svalbard, the asymmetrical ultraslow Knipovich spreading ridge and a 1,000 m deep rift ...
    • Characterization of seabed properties from Scholte waves acquired on floating ice on shallow water 

      Johansen, Tor Arne; Ruud, Bent Ole (Journal article; Peer reviewed, 2020)
      Seismic surveying of the coastal areas in the Arctic is best facilitated during wintertime when the sea ice is land-fast. This eases the logistics of the operation and assures that there is no damage made to the vulnerable ...
    • Chlamydial contribution to anaerobic metabolism during eukaryotic evolution 

      Stairs, Courtney W.; Sharamshi, Jennah E.; Tamarit, Daniel; Eme, Laura; Jørgensen, Steffen Leth; Spang, Anja; Ettema, Thijs J.G. (Journal article; Peer reviewed, 2020)
      The origin of eukaryotes is a major open question in evolutionary biology. Multiple hypotheses posit that eukaryotes likely evolved from a syntrophic relationship between an archaeon and an alphaproteobacterium based on ...
    • The chronology of reindeer hunting on Norway's highest ice patches 

      Pilø, Lars Holger; Finstad, Espen; Bronk Ramsey, Christopher; Martinsen, Julian Robert Post; Solli, Brit; Nesje, Atle; Wangen, Vivian; Callanan, Martin; Barrett, James H. (Peer reviewed; Journal article, 2018-01-24)
      The melting of perennial ice patches globally is uncovering a fragile record of alpine activity, especially hunting and the use of mountain passes. When rescued by systematic fieldwork (glacial archaeology), this evidence ...
    • Citizen Seismology in the Arctic 

      Jeddi, Zeinab; Voss, Peter H.; Sørensen, Mathilde B.; Danielsen, Finn; Dahl-Jensen, Trine; Larsen, Tine B.; Nielsen, G.; Hansen, A.; Jakobsen, P.; Frederiksen, P.O. (Journal article; Peer reviewed, 2020)
      Landslides, earthquakes and other natural disasters are expected to increase in the Arctic, yet our ability to make informed decisions about safety is tightly limited by lack of data. As part of the Integrated Arctic ...
    • Climate transition at the Eocene-Oligocene influenced by bathymetric changes to the Atlantic-Arctic oceanic gateways 

      Straume, Eivind Olavson; Nummelin, Aleksi Henrynpoika; Gaina, Carmen; Nisancioglu, Kerim Hestnes (Journal article; Peer reviewed, 2022)
      The Eocene–Oligocene Transition (∼33.9 Ma) marks the largest step transformation within the Cenozoic cooling trend and is characterized by a sudden growth of the Antarctic ice sheets, cooling of the interior ocean, and the ...
    • Climate variability in the subarctic area for the last 2 millennia 

      Nicolle, Marie; Debret, Maxime; Massei, Nicolas; Colin, Christophe; de Vernal, Anne; Divine, Dmitry V; Werner, Johannes; Hormes, Anne; Korhola, Atte; Linderholm, Hans W. (Peer reviewed; Journal article, 2018-01-25)
      To put recent climate change in perspective, it is necessary to extend the instrumental climate records with proxy data from paleoclimate archives. Arctic climate variability for the last 2 millennia has been investigated ...