• Arctic Holocene proxy climate database – New approaches to assessing geochronological accuracy and encoding climate variables 

      Sundqvist, H.S.; Kaufmann, Darrell; MaKay, Nickholas; Axford, Y.; Balascio, Nickholas; Briner, Jason P.; Cwynar, L.C.; Sejrup, Hans Petter; Subetto, D.A.; Andrews, J.T.; Bakke, Jostein; Birks, Harry John Betteley; Brooks, S.J.; Vernal, A.E.; Jennings, A.E.; Ljungvist, K.M.; Rûhland, K.M.; Saenger, C.; Smol, J.P.; Viau, A.E. (Peer reviewed; Journal article, 2014-08-29)
      We present a systematic compilation of previously published Holocene proxy climate records from the Arctic. We identified 170 sites from north of 58° N latitude where proxy time series extend back at least to 6 cal ka (all ...
    • Arctic hydroclimate variability during the last 2000 years: Current understanding and research challenges 

      Linderholm, Hans W.; Nicolle, Marie; Francus, Pierre; Gajewski, Konrad; Helama, Samuli; Korhola, Atte; Solomina, Olga; Yu, Zicheng; Zhang, Peng; D'Andrea, William J.; Debret, Maxime; Divine, Dmitry V; Gunnarson, Björn E.; Loader, Neil J.; Massei, Nicolas; Seftigen, Kristina; Thomas, Elizabeth K.; Werner, Johannes; Andersson, Sofia; Berntsson, Annika; Luoto, Tomi P.; Nevalainen, Liisa; Saarni, Saija; Väliranta, Minna (Peer reviewed; Journal article, 2018-04-10)
      Reanalysis data show an increasing trend in Arctic precipitation over the 20th century, but changes are not homogenous across seasons or space. The observed hydroclimate changes are expected to continue and possibly ...
    • 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 ...
    • 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, ...
    • 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 ...
    • Is there evidence for a 4.2 kaBP event in the northern North Atlantic region? 

      Jostein, Bakke; Bradley, Raymond S. (Peer reviewed; Journal article, 2019-09-02)
      We review paleoceanographic and paleoclimatic records from the northern North Atlantic to assess the nature of climatic conditions at 4.2 ka BP, which has been identified as a time of exceptional climatic anomalies in many ...
    • Large-scale features of Last Interglacial climate: results from evaluating the lig127k simulations for the Coupled Model Intercomparison Project (CMIP6)–Paleoclimate Modeling Intercomparison Project (PMIP4) 

      Otto-Bliesner, Bette L.; Brady, Esther C.; Zhao, Anni; Brierley, Chris M.; Axford, Yarrow; Capron, Emilie; Govin, Aline; Hoffman, Jeremy S.; Isaacs, Elizabeth; Kageyama, Masa; Scussolini, Paolo; Tzedakis, Polychronis C.; Williams, Charles J.R.; Wolff, Eric W.; Abe-Ouchi, Ayako; Braconnot, Pascale; Ramos Buarque, Silvana; Cao, Jian; de Vernal, Anne; Vittoria Guarino, Maria; Guo, Chuncheng; Legrande, Allegra N.; Lohmann, Gerrit; Meissner, Katrin J.; Menviel, Laurie; Morozova, Polina A.; Nisancioglu, Kerim H.; O'Ishi, Ryouta; Mélia, David Salas Y.; Shi, Xaoxu; Sicard, Marie; Sime, Louise C.; Stepanek, Christian; Tomas, Robert A.; Volodin, Evgeny; Yeung, Nicholas K.H.; Zhang, Qiong; Zhang, Zhongshi; Zheng, Weipeng (Journal article; Peer reviewed, 2021)
      The modeling of paleoclimate, using physically based tools, is increasingly seen as a strong out-of-sample test of the models that are used for the projection of future climate changes. New to the Coupled Model Intercomparison ...
    • 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 ...
    • A multi-model CMIP6-PMIP4 study of Arctic sea ice at 127 ka: sea ice data compilation and model differences 

      Kageyama, Masa; Sime, Louise C.; Sicard, Marie; Guarino, Maria-Vittoria; De Vernal, A; Stein, Ruediger; Schroeder, david; Malmierca-Vallet, Irene; Abe-Ouchi, Ayako; Bitz, Cecilia M.; Braconnot, Pascale; Brady, Esther C.; Cao, Jian; Chamberlain, Matthew; Feltham, Danny; Guo, Chuncheng; Legrande, Allegra N.; Lohmann, Gerrit; Meissner, Katrin; Menviel, Laurie; Nisancioglu, Kerim Hestnes; Otto-Bliesner, Bette L.; O'ishi, Ryouta; Ramos Buarque, Silvan; Salas y Mélia, David; Sherriff-Tadano, Sam; Stroeve, Julienne C.; Shi, Xiaoxu; Sun, Bo; Thomas, Robert; Volodin, Evgeny; Yeung, Nicholas K.H.; Zhang, Qiong; Zhang, Zhongshi; Zheng, Weipeng; Ziehn, Tilo (Journal article; Peer reviewed, 2021)
      The Last Interglacial period (LIG) is a period with increased summer insolation at high northern latitudes, which results in strong changes in the terrestrial and marine cryosphere. Understanding the mechanisms for this ...
    • Rapid and sustained environmental responses to global warming: the Paleocene–Eocene Thermal Maximum in the eastern North Sea 

      Stokke, Ella W.; Jones, Morgan Thomas; Riber, Lars; Haflidason, Haflidi; Midtkandal, Ivar; Schultz, Bo; Svensen, Henrik (Journal article; Peer reviewed, 2021)
      The Paleocene–Eocene Thermal Maximum (PETM; ∼ 55.9 Ma) was a period of rapid and sustained global warming associated with significant carbon emissions. It coincided with the North Atlantic opening and emplacement of the ...
    • Reduced El Niño variability in the mid-Pliocene according to the PlioMIP2 ensemble 

      Oldeman, Arthur M.; Baatsen, Michiel L. J.; Von Der Heydt, Anna S.; Dijkstra, Henk A.; Tindall, Julia C.; Abe-Ouchi, Ayako; Booth, Alice R.; Brady, Esther C.; Chan, Wing-Le; Chandan, Deepak; Chandler, Mark A.; Contoux, Camille; Feng, Ran; Guo, Chuncheng; Haywood, Alan M.; Hunter, Stephen J.; Kamae, Youichi; Li, Qiang; Li, Xiangyu; Lohmann, Gerrit; Lunt, Daniel J.; Nisancioglu, Kerim Hestnes; Otto-Bliesner, Bette L.; Peltier, W. Richard; Pontes, Gabriel M.; Ramstein, Gilles; Sohl, Linda E.; Stepanek, Christian; Tan, Ning; Zhang, Qiong; Zhang, Zhongshi; Wainer, Ilana; Williams, Charles J. R. (Journal article; Peer reviewed, 2021)
      The mid-Pliocene warm period (3.264–3.025 Ma) is the most recent geological period during which atmospheric CO2 levels were similar to recent historical values (∼400 ppm). Several proxy reconstructions for the mid-Pliocene ...
    • The role of the northward-directed (sub)surface limb of the Atlantic Meridional Overturning Circulation during the 8.2 ka event 

      Tegzes, Andrea Diana; Jansen, Eystein; Telford, Richard (Peer reviewed; Journal article, 2014-10-24)
      The so-called "8.2 ka event" is widely regarded as a major Holocene climate perturbation. It is most readily identifiable in the oxygen-isotope records from Greenland ice cores as an approximately 160-year-long cold interval ...
    • Simulating last interglacial climate with NorESM: role of insolation and greenhouse gases in the timing of peak warmth 

      Langebroek, Petra; Nisancioglu, Kerim Hestnes (Peer reviewed; Journal article, 2014-07-10)
      The last interglacial (LIG, ~130–116 ka, ka = 1000 yr ago) is characterized by high-latitude warming and is therefore often considered as a possible analogue for future warming. However, in contrast to predicted ...
    • Southern Ocean bottom-water cooling and ice sheet expansion during the middle Miocene climate transition 

      Leutert, Thomas Jan; Modestou, Sevasti Eleni; Bernasconi, Stefano M.; Meckler, A. Nele (Journal article; Peer reviewed, 2021)
      The middle Miocene climate transition (MMCT), around 14 Ma, was associated with a significant climatic shift, but the mechanisms triggering the event remain enigmatic. We present a clumped isotope (Δ47) bottom-water ...
    • Spatio-temporal variability of Arctic summer temperatures over the past 2 millennia 

      Werner, Johannes; Divine, Dmitry V; Ljungqvist, Fredrik Charpentier; Nilsen, Tine; Francus, Pierre (Peer reviewed; Journal article, 2018-04-24)
      In this article, the first spatially resolved and millennium-length summer (June–August) temperature reconstruction over the Arctic and sub-Arctic domain (north of 60°N) is presented. It is based on a set of 44 annually ...
    • Using simulations of the last millennium to understand climate variability seen in palaeo-observations: Similar variation of Iceland-Scotland overflow strength and Atlantic Multidecadal Oscillation 

      Lohmann, Katja; Mignot, Juliette; Langehaug, Helene Reinertsen; Jungclaus, Johann H.; Matei, Daniela; Otterå, Odd Helge; Gao, Yongqi; Mjell, Tor Lien; Ninnemann, Ulysses Silas; Kleiven, Helga Flesche (Peer reviewed; Journal article, 2015-02-10)
      A recent palaeo-reconstruction of the strength of the Iceland–Scotland overflow during the last 600 years suggests that its low-frequency variability exhibits strong similarity with palaeo-reconstructions of the Atlantic ...