• A 2-million-year-old ecosystem in Greenland uncovered by environmental DNA 

      Kjær, Kurt H.; Winther Pedersen, Mikkel; De Sanctis, Bianca; De Cahsan, Binia; Korneliussen, Thorfinn S.; Michelsen, Christian S.; Sand, Karina K.; Jelavić, Stanislav; Ruter, Anthony H.; Schmidt, Astrid M. A.; Kjeldsen, Kristian K.; Tesakov, Alexey S.; Snowball, Ian; Gosse, John C.; Alsos, Inger Greve; Wang, Yucheng; Dockter, Christoph; Rasmussen, Magnus; Jørgensen, Morten E.; Skadhauge, Birgitte; Prohaska, Ana; Kristensen, Jeppe Å.; Bjerager, Morten; Allentoft, Morten E.; Coissac, Eric; Rouillard, Alexandra; Simakova, Alexandra; Fernandez-Guerra, Antonio; Bowler, Chris; Macias-Fauria, Marc; Vinner, Lasse; Welch, John J.; Hidy, Alan J.; Sikora, Martin; Collins, Matthew J.; Durbin, Richard; Larsen, Nicolaj K.; Willerslev, Eske (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-07)
      Late Pliocene and Early Pleistocene epochs 3.6 to 0.8 million years ago had climates resembling those forecasted under future warming. Palaeoclimatic records show strong polar amplification with mean annual temperatures of 11–19 °C above contemporary values. The biological communities inhabiting the Arctic during this time remain poorly known because fossils are rare. Here we report an ancient ...
    • Complexity revealed in the greening of the Arctic 

      Myers-Smith, Isla H.; Kerby, Jeffrey T.; Phoenix, Gareth K.; Bjerke, Jarle W.; Epstein, Howard E.; Assmann, Jakob J.; John, Christian; Andreu-Hayles, Laia; Angers-Blondin, Sandra; Beck, Pieter S. A.; Berner, Logan T.; Bhatt, Uma S.; Bjorkman, Anne D.; Blok, Daan; Bryn, Anders; Christiansen, Casper Tai; Cornelissen, J. Hans C.; Cunliffe, Andrew M.; Elmendorf, Sarah C.; Forbes, Bruce C.; Goetz, Scott J.; Hollister, Robert D.; de Jong, Rogier; Loranty, Michael M.; Macias-Fauria, Marc; Maseyk, Kadmiel; Normand, Signe; Olofsson, Johan; Parker, Thomas C.; Parmentier, Frans-Jan W.; Post, Eric; Schaepman-Strub, Gabriela; Stordal, Frode; Sullivan, Patrick F.; Thomas, Haydn J.D.; Tømmervik, Hans; Treharne, Rachael; Tweedie, Craig E.; Walker, Donald A.; Wilmking, Martin; Wipf, Sonja (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-31)
      As the Arctic warms, vegetation is responding, and satellite measures indicate widespread greening at high latitudes. This ‘greening of the Arctic’ is among the world’s most important large-scale ecological responses to global climate change. However, a consensus is emerging that the underlying causes and future dynamics of so-called Arctic greening and browning trends are more complex, variable ...
    • A Driftwood-Based Record of Arctic Sea Ice During the Last 500 Years From Northern Svalbard Reveals Sea Ice Dynamics in the Arctic Ocean and Arctic Peripheral Seas 

      Hole, Georgia M.; Rawson, Thomas; Farnsworth, Wesley Randall; Schomacker, Anders; Ingólfsson, Ólafur; Macias-Fauria, Marc (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-15)
      We present a 500-year history of naturally felled driftwood incursion to northern Svalbard, directly reflecting regional sea ice conditions and Arctic Ocean circulation. Provenance and age determinations by dendrochronology and wood anatomy provide insights into Arctic Ocean currents and climatic conditions at a fine spatial resolution, as crossdating with reference chronologies from the ...
    • Persistence of Holocene ice cap in northeast Svalbard aided by glacio-isostatic rebound 

      Farnsworth, Wesley Randall; Ingólfsson, Ólafur; Brynjólfsson, Skafti; Allaart, Lis; Kjellman, Sofia Elisabeth; Kjær, Kurt H.; Larsen, Nicolaj K.; Macias-Fauria, Marc; Siggaard-Andersen, Marie-Louise; Schomacker, Anders (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-29)
      The deglaciation of the Svalbard-Barents Sea Ice Sheet was driven by relative sea-level rise, the incursion of North Atlantic waters around Spitsbergen, and increasing summer insolation. However, ice retreat was inter rupted by asynchronous re-advances that occurred into high relative seas, during a period associated with warm regional waters and elevated summer temperatures. Better understanding ...
    • Shrub expansion in tundra ecosystems : dynamics, impacts and research priorities 

      Myers-Smith, Isla; Forbes, Bruce C.; Wilmking, Martin; Hallinger, Martin; Lantz, Trevor; Blok, Daan; Tape, Ken D; Ravolainen, Virve; Macias-Fauria, Marc; Sass-Klaassen, Ute; Levesque, Esther; Boudreau, Stephane; Ropars, Pascale; Hermanutz, Luise; Trant, Andrew; Collier, Laura Siegwart; Weijers, Niels Martin; Rozema, Jelte; Rayback, Shelly A; Schmidt, Niels Martin; Schaepman-Strub, Gabriela; Wipf, Sonja; Rixen, Christian; Menard, Cecile B; Venn, Susanna; Goetz, Scott; Andreu-Hayles, Laia; Elmendorf, Sarah; Welker, Jeffrey; Grogan, Paul; Epstein, Howard E.; Hik, David S. (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      Recent research using repeat photography, long-term ecological monitoring and dendrochronology has documented shrub expansion in arctic, high-latitude and alpine tundra ecosystems. Here, we (1) synthesize these findings, (2) present a conceptual framework that identifies mechanisms and constraints on shrub increase, (3) explore causes, feedbacks and implications of the increased shrub cover in tundra ...