• 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 ...
    • 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 ...
    • Consistent fluctuations in intermediate water temperature off the coast of Greenland and Norway during Dansgaard-Oeschger events 

      Sessford, Evangeline; Jensen, Mari Fjalstad; Tisserand, Amandine Aline; Muschitiello, Francesco; Dokken, Trond Martin; Nisancioglu, Kerim Hestnes; Jansen, Eystein (Peer reviewed; Journal article, 2019-11-01)
      Rapid warmings epitomize the Dansgaard-Oeschger events that are recorded in Greenland ice cores and imprinted in ocean sediment cores. While the abrupt climate changes appear connected to perturbations in sea ice and ocean ...
    • Dansgaard-Oeschger cycles: Interactions between ocean and sea ice intrinsic to the Nordic seas 

      Dokken, Trond Martin; Nisancioglu, Kerim Hestnes; Li, Camille; Battisti, David Stephen; Kissel, Catherine (Peer reviewed; Journal article, 2013-09)
      Dansgaard-Oeschger (D-O) cycles are the most dramatic, frequent, and wide-reaching abrupt climate changes in the geologic record. On Greenland, D-O cycles are characterized by an abrupt warming of 10 ± 5°C from a cold ...
    • Eemian Greenland ice sheet simulated with a higher-order model shows strong sensitivity to surface mass balance forcing 

      Plach, Andreas; Nisancioglu, Kerim Hestnes; Langebroek, Petra; Born, Andreas; Le clec'h, Sebastien (Peer reviewed; Journal article, 2019-08-15)
      The Greenland ice sheet contributes increasingly to global sea level rise. Its history during past warm intervals is a valuable reference for future sea level projections. We present ice sheet simulations for the Eemian ...
    • Eemian Greenland SMB strongly sensitive to model choice 

      Plach, Andreas; Nisancioglu, Kerim Hestnes; Le clec'h, Sebastien; Born, Andreas; Langebroek, Petra; Guo, Chuncheng; Imhof, Michael; Stocker, Thomas F. (Peer reviewed; Journal article, 2018-10-19)
      Understanding the behavior of the Greenland ice sheet in a warmer climate, and particularly its surface mass balance (SMB), is important for assessing Greenland’s potential contribution to future sea level rise. The Eemian ...
    • Equilibrium simulations of Marine Isotope Stage 3 climate 

      Guo, Chuncheng; Nisancioglu, Kerim Hestnes; Bentsen, Mats; Bethke, Ingo; Zhang, Zhongshi (Peer reviewed; Journal article, 2019-06-26)
      An equilibrium simulation of Marine Isotope Stage 3 (MIS3) climate with boundary conditions characteristic of Greenland Interstadial 8 (GI-8; 38 kyr BP) is carried out with the Norwegian Earth System Model (NorESM). A ...
    • Evaluating the large-scale hydrological cycle response within the Pliocene Model Intercomparison Project Phase 2 (PlioMIP2) ensemble 

      Han, Zixuan; Zhang, Qiong; Li, Qiang; Feng, Ran; Haywood, Alan M.; Tindall, Julia C.; Hunter, Stephen J.; Otto-Bliesner, Bette L.; Brady, Esther C.; Rosenbloom, Nan; Zhang, Zhongshi; Li, Xiangyu; Guo, Chuncheng; Nisancioglu, Kerim Hestnes; Stepanek, Christian; Lohmann, Gerrit; Sohl, Linda E.; Chandler, Mark A.; Tan, Ning; Ramstein, Gilles; Baatsen, Michiel L. J.; Von Der Heydt, Anna S.; Chandan, Deepak; Peltier, W. Richard; Williams, Charles J. R.; Lunt, Daniel J.; Cheng, Jianbo; Wen, Qin; Burls, Natalie J. (Journal article; Peer reviewed, 2021)
      The mid-Pliocene (∼3 Ma) is one of the most recent warm periods with high CO2 concentrations in the atmosphere and resulting high temperatures, and it is often cited as an analog for near-term future climate change. Here, ...
    • Exceptionally high heat flux needed to sustain the Northeast Greenland Ice Stream 

      Smith-Johnsen, Silje; de Fleurian, Basile; Schlegel, Nicole; Seroussi, Hélène; Nisancioglu, Kerim Hestnes (Journal article; Peer reviewed, 2020)
      The Northeast Greenland Ice Stream (NEGIS) currently drains more than 10 % of the Greenland Ice Sheet area and has recently undergone significant dynamic changes. It is therefore critical to accurately represent this feature ...
    • A first chronology for the East Greenland Ice-core Project (EGRIP) over the Holocene and last glacial termination 

      Mojtabavi, Seyedhamidreza; Wilhelms, Frank; Cook, Eliza; Davies, Siwan M.; Sinnl, Giulia; Skov Jensen, Mathias; Dahl-Jensen, Dorthe; Svensson, Anders; Vinther, Bo; Kipfstuhl, Sepp; Jones, Gwydion; Karlsson, Nanna B.; Henrique Faria, Sergio; Gkinis, Vasileios; Astrid Kjær, Helle; Erhardt, Tobias; Berben, Sarah Miche Patricia; Nisancioglu, Kerim Hestnes; Koldtoft, Iben; Olander Rasmussen, Sune (Journal article; Peer reviewed, 2020)
      This paper provides the first chronology for the deep ice core from the East Greenland Ice-core Project (EGRIP) over the Holocene and the late last glacial period. We rely mainly on volcanic events and common peak patterns ...
    • Geometric controls of tidewater glacier dynamics 

      Frank, Thomas; Åkesson, Henning; Fleurian, Basile de; Morlighem, M.; Nisancioglu, Kerim Hestnes (Journal article; Peer reviewed, 2022)
      Retreat of marine outlet glaciers often initiates depletion of inland ice through dynamic adjustments of the upstream glacier. The local topography of a fjord may promote or inhibit such retreat, and therefore fjord geometry ...
    • Global Cenozoic Paleobathymetry with a focus on the Northern Hemisphere Oceanic Gateways 

      Straume, Eivind Olavson; Gaina, Carmen; Medvedev, Sergei; Nisancioglu, Kerim Hestnes (Journal article; Peer reviewed, 2020)
      The evolution of the Northern Hemisphere oceanic gateways has facilitated ocean circulation changes and may have influenced climatic variations in the Cenozoic time (66 Ma–0 Ma). However, the timing of these oceanic gateway ...
    • Impact of Fjord Geometry on Grounding Line Stability 

      Åkesson, Henning; Nisancioglu, Kerim Hestnes; Nick, Faezeh M. (Peer reviewed; Journal article, 2018-06-05)
      Recent and past retreat of marine-terminating glaciers are broadly consistent with observed ocean warming, yet responses vary significantly within regions experiencing similar ocean conditions. We assess how fjord geometry ...
    • Increased ventilation of Antarctic deep water during the warm mid-Pliocene 

      Zhang, Zhongshi; Nisancioglu, Kerim Hestnes; Ninnemann, Ulysses Silas (Peer reviewed; Journal article, 2013-02-19)
      The mid-Pliocene warm period is a recent warm geological period that shares similarities with predictions of future climate. It is generally held the mid-Pliocene Atlantic Meridional Overturning Circulation must have been ...
    • The interaction between sea ice and salinity-dominated ocean circulation: implications for halocline stability and rapid changes of sea ice cover 

      Jensen, Mari Fjalstad; Nilsson, Johan; Nisancioglu, Kerim Hestnes (Peer reviewed; Journal article, 2016-11)
      Changes in the sea ice cover of the Nordic Seas have been proposed to play a key role for the dramatic temperature excursions associated with the Dansgaard–Oeschger events during the last glacial. In this study, we develop ...
    • Internal Ocean Dynamics Control the Long-Term Evolution of Weddell Sea Polynya Activity 

      Rheinlænder, Jonathan Winfield; Smedsrud, Lars Henrik; Nisancioglu, Kerim Hestnes (Journal article; Peer reviewed, 2021)
      Open-ocean polynyas effectively couple the ocean and atmosphere through large ice-free areas within the sea-ice cover, release vast quantities of oceanic heat, and impact deep ocean ventilation. Changes in polynya activity, ...
    • Large changes in sea ice triggered by small changes in Atlantic water temperature 

      Jensen, Mari Fjalstad; Nisancioglu, Kerim Hestnes; Spall, Michael A. (Peer reviewed; Journal article, 2018-06)
      The sensitivity of sea ice to the temperature of inflowing Atlantic water across the Greenland–Scotland Ridge is investigated using an eddy-resolving configuration of the Massachusetts Institute of Technology General ...
    • Lessons from a high-CO2 world: an ocean view from  ∼ 3 million years ago 

      McClymont, Erin L.; Ford, Heather; Ho, Sze Ling; Tindall, Julia C.; Haywood, Alan M.; Alonso-Garcia, Montserrat; Bailey, Ian; Berke, Melissa A.; Littler, Kate; Patterson, Molly O.; Petrick, Benjamin; Peterse, Francien; Ravelo, Ana Christina; Risebrobakken, Bjørg; De Schepper, Stijn; Swann, George E. A.; Kaustubh, Thirumalai; Tierney, Jessica E; Van der Weijst, Carolien; white, sarah; Abe-Ouchi, Ayako; Baatsen, Michiel L. J.; Brady, Esther C.; Chan, Wing-Le; Chandan, Deepak; Ran, Feng; Guo, Chenchen Guo; von der Heydt, Anna S.; Stephen, Hunter; Xiangyi, Li; Lohmann, Gerrit; Nisancioglu, Kerim Hestnes; Otto-Bliesner, Bette L.; Peltier, Richard W.; Stepanek, Christian; Zhang, Zhongshi (Journal article; Peer reviewed, 2020)
      A range of future climate scenarios are projected for high atmospheric CO2 concentrations, given uncertainties over future human actions as well as potential environmental and climatic feedbacks. The geological record ...
    • Mid-Pliocene Atlantic Meridional Overturning Circulation simulated in PlioMIP2 

      Zhang, Zhongshi; Li, Xiangyu; Guo, Chuncheng; Otterå, Odd Helge; Nisancioglu, Kerim Hestnes; Tan, Ning; Contoux, Camille; Ramstein, Gilles; Feng, Ran; Otto-Bliesner, Bette L.; Brady, Esther C.; Chandan, Deepak; Richard Peltier, Peltier; Baatsen, Michiel L. J.; Von Der Heydt, Anna S.; Weiffenbach, Julia E.; Stepanek, Christian; Lohmann, Gerrit; Zhang, Qiong; Li, Qiang; Chandler, Mark A.; Sohl, Linda E.; Haywood, Alan M.; Hunter, Stephen J.; Tindall, Julia C.; Williams, Charles; Lunt, Daniel J.; Chan, Wing-Le; Abe-Ouchi, Ayako (Journal article; Peer reviewed, 2021)
      In the Pliocene Model Intercomparison Project Phase 2 (PlioMIP2), coupled climate models have been used to simulate an interglacial climate during the mid-Piacenzian warm period (mPWP; 3.264 to 3.025 Ma). Here, we compare ...
    • Mid-Pliocene West African Monsoon rainfall as simulated in the PlioMIP2 ensemble 

      Berntell, Ellen; Zhang, Qiong; Li, Qiang; Haywood, Alan M.; Tindall, Julia C.; Hunter, Stephen J.; Zhang, Zhongshi; Xiangyu, Li; Guo, Chuncheng; Nisancioglu, Kerim Hestnes; Stepanek, Christian; Lohmann, Gerrit; Sohl, Linda E.; Chandler, Mark A.; Tan, Ning; Contoux, Camille; Ramstein, Gilles; Baatsen, Michiel L. J.; von der Heydt, Anna S.; Chandan, Deepak; Peltier, W. Richard; Abe-Ouchi, Ayako; Chan, Wing-Le; Kamae, Youichi; Williams, Charles J. R.; Lunt, Daniel J.; Feng, Ran; Otto-Bliesner, Bette L.; Brady, Esther C. (Journal article; Peer reviewed, 2021)
      The mid-Pliocene warm period (mPWP; ∼3.2 million years ago) is seen as the most recent time period characterized by a warm climate state, with similar to modern geography and ∼400 ppmv atmospheric CO2 concentration, and ...