• Global maps of soil temperature 

      Lembrechts, Jonas J.; van den Hoogen, Johan; Aalto, Juha; Ashcroft, Michael B.; de Frenne, Pieter; Kemppinen, Julia; Kopecký, Martin; Luoto, Miska; Maclean, Ilya M. D.; Crowther, Thomas W.; Bailey, Joseph J.; Haesen, Stef; Klinges, David H.; Niittynen, Pekka; Scheffers, Brett R.; Van Meerbeek, Koenraad; Aartsma, Peter; Abdalaze, Otar; Abedi, Mehdi; Aerts, Rien; Ahmadian, Negar; Ahrends, Antje; Alatalo, Juha M.; Alexander, Jake M.; Allonsius, Camille Nina; Altman, Jan; Ammann, Christof; Andres, Christian; Andrews, Christopher; Ardö, Jonas; Arriga, Nicola; Arzac, Alberto; Aschero, Valeria; Leandro de Assis, Rafael; Barančok, Peter; Barrio, Isabel C; Barros, Agustina; Lenoir, Jonathan; Assmann, Jakob Johann; Bader, Maaike Y.; Bahalkeh, Khadijeh; Basham, Edmund W.; Bauters, Marijn; Bazzichetto, Manuele; Marchesini, Luca Belelli; Bell, Michael C.; Benavides, Juan C.; Alonso, José Luis Benito; Berauer, Bernd J.; Bjerke, Jarle W.; Björk, Robert G.; Björkman, Mats P.; Björnsdóttir, Katrin; Blonder, Benjamin; Boeckx, Pascal; Boike, Julia; Bokhorst, Stef; Brum, Bárbara N.S.; Brůna, Josef; Buchmann, Nina; Buysse, Pauline; Camargo, José Luís; Campoe, Otávio C.; Candan, Onur; Canessa, Rafaella; Cannone, Nicoletta; Carbognani, Michele; Carnicer, Jofre; Casanova-Katny, Angélica; Cesarz, Simone; Chojnicki, Bogdan; Choler, Philippe; Chown, Steven L.; Cifuentes, Edgar F.; Čiliak, Marek; Contador, Tamara; Convey, Peter; Cooper, Elisabeth (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-29)
      Research in global change ecology relies heavily on global climatic grids derived from estimates of air temperature in open areas at around 2 m above the ground. These climatic grids do not reflect conditions below vegetation canopies and near the ground surface, where critical ecosystem functions occur and most terrestrial species reside. Here, we provide global maps of soil temperature and bioclimatic ...
    • Large loss of CO2 in winter observed across the northern permafrost region 

      Natali, Susan M.; Watts, Jennifer D.; Rogers, Brendan M.; Potter, Stefano; Ludwig, Sarah M.; Selbmann, Anne-Katrin; Sullivan, Patrick F.; Abbott, Benjamin W.; Arndt, Kyla A.; Birch, Leah; Björkman, Mats P.; Bloom, A. Anthony; Celis, Gerardo; Christensen, Torben R.; Christiansen, Casper Tai; Commane, Roisin; Cooper, Elisabeth J.; Crill, Patrick; Czimczik, Claudia; Davydov, Sergey; Du, Jinyang; Egan, Jocelyn E.; Elberling, Bo; Euskirchen, Eugenie S.; Friborg, Thomas; Genet, Hélène; Göckede, Mathias; Goodrich, Jordan P.; Grogan, Paul; Helbig, Manuel; Jafarov, Elchin E.; Jastrow, Julie D.; Kalhori, Aram A. M.; Kim, Yongwon; Kimball, John S.; Kutzbach, Lars; Lara, Mark J.; Larsen, Klaus S.; Lee, Bang-Yong; Liu, Zhihua; Loranty, Michael M.; Lund, Magnus; Lupascu, Massimo; Madani, Nima; Malhotra, Avni; Matamala, Roser; McFarland, Jack; McGuire, A. David; Michelsen, Anders; Minions, Christina; Oechel, Walter C.; Olefeldt, David; Parmentier, Frans-Jan W.; Pirk, Norbert; Poulter, Ben; Quinton, William; Rezanezhad, Fereidoun; Risk, David; Sachs, Torsten; Schaefer, Kevin; Schmidt, Niels M.; Schuur, Edward A. G.; Semenchuk, Philipp R.; Shaver, Gaius; Sonnentag, Oliver; Starr, Gregory; Treat, Claire C.; Waldrop, Mark P.; Wang, Yihui; Welker, Jeffrey; Wille, Christian; Xu, Xiaofeng; Zhang, Zhen; Zhuang, Qianlai; Zona, Donatella (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-21)
      Recent warming in the Arctic, which has been amplified during the winter, greatly enhances microbial decomposition of soil organic matter and subsequent release of carbon dioxide (CO<sub>2</sub>). However, the amount of CO<sub>2</sub> released in winter is not known and has not been well represented by ecosystem models or empirically based estimates. Here we synthesize regional in situ observations ...
    • A review of open top chamber (OTC) performance across the ITEX Network 

      Hollister, Robert D.; Elphinstone, Cassandra; Henry, Greg H.R.; Bjorkman, Anne D.; Klanderud, Kari; Björk, Robert G.; Björkman, Mats P.; Bokhorst, Stef; Carbognani, Michele; Cooper, Elisabeth; Dorrepaal, Ellen; Elmendorf, Sarah C.; Fetcher, Ned; Gallois, Elise C.; Gudmundsson, Jon Steinar; Healey, Nathan C.; Jonsdottir, Ingibjorg Svala; Klarenberg, Ingeborg J.; Oberbauer, Steven F.; Macek, Petr; May, Jeremy L.; Mereghetti, Alessandro; Molau, Ulf; Petraglia, Alessandro; Rinnan, Riikka; Rixen, Christian; Wookey, Philip A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-10-19)
      Open top chambers (OTCs) were adopted as the recommended warming mechanism by the International Tundra Experiment (ITEX) network in the early 1990’s. Since then, OTCs have been deployed across the globe. Hundreds of papers have reported the impacts of OTCs on the abiotic environment and the biota. Here we review the impacts of the OTC on the physical environment, with comments on the appropriateness ...
    • The tundra phenology database: more than two decades of tundra phenology responses to climate change 

      Prevéy, Janet; Elmendorf, Sarah; Cooper, Elisabeth; Bjorkman, Anne; Alatalo, Juha M.; Ashton, Isabel; Björk, Mats P.; Assmann, Jakob J.; Björk, Robert G.; Björkman, Mats P.; Cannone, Nicoletta; Carbognani, Michele; Chisholm, Chelsea; Clark, Karin; Collins, Courtney G.; Elberling, Bo; Frei, Esther R.; Henry, Gregory R.H.; Hollister, Robert D.; Høye, Toke Thomas; Jonsdottir, Ingibjörg Svala; Kerby, Jeffrey T.; Klanderud, Kari; Kopp, Christopher; Levesque, Esther; Mauritz, Marguerite; Molau, Ulf; Myers-smith, Isla H.; Natali, Susan M.; Oberbauer, Steven F.; Panchen, Zoe; Petraglia, Alessandro; Post, Eric; Rixen, Christian; Rodenhizer, Heidi; Rumpf, Sabine B.; Schmidt, Niels Martin; Schuur, Ted; Semenchuk, Philipp; Smith, Jane Griffin; Suding, Katharine; Totland, Ørjan; Troxler, Tiffany; Wahren, Henrik; Welker, Jeffrey M.; Wipf, Sonja; Yang, Yue (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-11)
      Observations of changes in phenology have provided some of the strongest signals of the effects of climate change on terrestrial ecosystems. The International Tundra Experiment (ITEX), initiated in the early 1990s, established a common protocol to measure plant phenology in tundra study areas across the globe. Today, this valuable collection of phenology measurements depicts the responses of ...
    • Winters are changing: snow effects on Arctic and alpine tundra ecosystems 

      Rixen, Christian; Høye, Toke Thomas; Macek, Petr; Aerts, Rien; Alatalo, Juha; Andeson, Jill; Arnold, Pieter; Barrio, Isabel C.; Bjerke, Jarle W.; Björkman, Mats P.; Blok, Daan; Blume-werry, Gesche; Boike, Julia; Bokhorst, Stef; Carbognani, Michele; Christiansen, Casper Tai; Convey, Peter; Cooper, Elisabeth J.; Cornelissen, J. Hans C.; Coulson, Stephen; Dorrepaal, Ellen; Elberling, Bo; Elmendorf, Sarah; Elphinstone, Cassandra; Forte, T'ai Gladys Whittingham; Frei, Esther R.; Geange, Sonya Rita; Gehrmann, Friederike; Gibson, Casey; Grogan, Paul; Rechsteiner, Aud Helen Halbritter; Harte, John; Henry, Greg H.R.; Inouye, David W.; Irwin, Rebecca; Jespersen, Gus; Jónsdóttir, Ingibjörg Svala; Jung, Ji Young; Klinges, David H.; Kudo, Gaku; Lämsä, Juho; Lee, Hanna; Lembrechts, Jonas; Lett, Signe; Lynn, Joshua Scott; Mann, Hjalte Mads; Mastepanov, Mikhail; Morse, Jennifer; Myers-Smith, Isla; Olofsson, Johan; Semenchuk, Philipp; Vandvik, Vigdis (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-18)
      Snow is an important driver of ecosystem processes in cold biomes. Snow accumulation determines ground temperature, light conditions and moisture availability during winter. It also affects the growing season’s start and end, and plant access to moisture and nutrients. Here, we review the current knowledge of the snow cover’s role for vegetation, plant-animal interactions, permafrost conditions, ...