• Changes in greening in the High Arctic - insights from a 30-year AVHRR max NDVI dataset for Svalbard 

      Vickers, Hannah; Høgda, Kjell Arild; Solbø, Stian; Karlsen, Stein Rune; Tømmervik, Hans; Aanes, Ronny; Hansen, Brage Bremset (Journal article; Peer reviewed, 2016)
      Satellite-aided studies of vegetation cover, biomass and productivity are becoming increasingly important formonitoring the effects of a changing climate on the biosphere. With their large spatial coverage and good temporal ...
    • Changes in growing season duration and productivity of northern vegetation inferred from long-term remote sensing data 

      Park, Taejin; Ganguly, Sangram; Tømmervik, Hans; Euskirchen, Eugénie S.; Høgda, Kjell Arild; Karlsen, Stein Rune; Brovkin, Victor; Nemani, Ramakrishna R.; Myneni, Ranga B. (Journal article; Peer reviewed, 2016)
      Monitoring and understanding climate-induced changes in the boreal and arctic vegetation is critical to aid in prognosticating their future.Weused a 33 year (1982–2014) long record of satellite observations to robustly ...
    • Extreme event impacts on CO2 fluxes across a range of high latitude, shrub-dominated ecosystems 

      Treharne, Rachael; Bjerke, Jarle W.; Tømmervik, Hans; Phoenix, Gareth K. (Peer reviewed; Journal article, 2020)
      The Arctic is experiencing an increased frequency of extreme events which can cause landscape-scale vegetation damage. Extreme event-driven damage is an important driver of the decline in vegetation productivity (termed ...
    • Focus on recent, present and future Arctic and boreal productivity and biomass changes 

      Tømmervik, Hans; Forbes, Bruce C. (Peer reviewed; Journal article, 2020)
      The reduction of cold temperature constraints on photosynthesis in recent decades has led to extended growing seasons and increased plant productivity (greening) in significant parts of Polar, Arctic and Boreal regions, ...
    • The future distribution of wetland birds breeding in Europe validated against observed changes in distribution 

      Soultan, Alaaeldin; Pavòn-Jordàn, Diego; Bradter, Ute; Sandercock, Brett; Hochachka, Wesley M.; Johnston, Alison; Brommer, Jon; Gaget, Elie; Keller, Verena; Knaus, Peter; Aghababyan, Karen; Maxhuni, Qenan; Vintchevski, Alexandre; Nagy, Károly; Raudonikis, Liutauras; Balmer, Dawn E.; Noble, David; Leitão, Domingos; Øien, Ingar Jostein; Shimmings, Paul; Sultanov, Elchin; Caffrey, Brian; Boyla, Kerem; Radišić, Dimitrije; Lindström, Åke; Velevski, Metodija; Pladevall, Clara; Brotons, Lluis; Karel, Šťastný; Rajković, Draženko Z.; Chodkiewicz, Tomasz; Wilk, Tomasz; Tibor, Szép; van Turnhout, Chris; Foppen, Ruud; Burfield, Ian; Vikstrøm, Thomas; Mazal, Vlatka Dumbović; Eaton, Mark; Vorisek, Petr; Lehikoinen, Aleksi; Herrando, Sergi; Kuzmenko, Tatiana; Bauer, Hans-Günther; Kalyakin, Mikhail; Voltzit, Olga; Sjeničić, Jovica; Pärt, Tomas (Peer reviewed; Journal article, 2022)
      Wetland bird species have been declining in population size worldwide as climate warming and land-use change affect their suitable habitats. We used species distribution models (SDMs) to predict changes in range dynamics ...
    • Impacts of snow season on ground-ice accumulation, soil frost andprimary productivity in a grassland of sub-Arctic Norway 

      Bjerke, Jarle W.; Tømmervik, Hans; Zielke, Matthias; Jørgensen, Marit (Peer reviewed; Journal article, 2015)
      Europe’s and the World’s northernmost agriculture is very vulnerable to harsh overwintering conditions. It is important from both an economic and societal standpoint to have accurate methods of predicting the severity ...
    • Low impact of dry conditions on the CO2 exchange of aNorthern-Norwegian blanket bog. 

      Lund, Magnus; Bjerke, Jarle W.; Drake, Bert G.; Engelsen, Ola; Hansen, Georg Heinrich; Parmentier, Frans-Jan W.; Powell, Thomas; Silvennoinen, Hanna Marika; Sottocornola, Matteo; Tømmervik, Hans; Weldon, Simon Mark; Rasse, Daniel (Peer reviewed; Journal Article, 2015)
      Northern peatlands hold large amounts of organic carbon (C) in their soils and are as such important in a climate change context. Blanket bogs, i.e. nutrient-poor peatlands restricted to maritime climates, may be extra ...
    • Record-low primary productivity and highplant damage in the Nordic Arctic Region in2012 caused by multiple weather events andpest outbreaks 

      Bjerke, Jarle W.; Karlsen, Stein Rune; Høgda, Kjell Arild; Malnes, Eirik; Jepsen, Jane Uhd; Lovibond, Sarah; Vikhamar-Schuler, Dagrun; Tømmervik, Hans (Peer reviewed; Journal article, 2014)
      The release of cold temperature constraints on photosynthesis has led to increased productivity (greening) in significant parts (32–39%) of the Arctic, but much of the Arctic shows stable (57–64%) or reduced productivity ...
    • Snow season variability in a boreal-Arctic transition area monitored by MODIS data 

      Malnes, Eirik; Karlsen, Stein Rune; Johansen, Bernt; Bjerke, Jarle W.; Tømmervik, Hans (Journal article; Peer reviewed, 2016)
      The duration and extent of snow cover is expected to change rapidly with climate change. Therefore, there is a need for improved monitoring of snow for the benefit of forecasting, impact assessments and the population ...
    • Urban nature in a time of crisis: recreational use of green space increases during the COVID-19 outbreak in Oslo, Norway 

      Venter, Alexander Samuel; Barton, David Nicholas; Gundersen, Vegard; Figari, Helene; Nowell, Megan Sara (Peer reviewed; Journal article, 2020)
      The global response to the COVID-19 pandemic has brought with it significant changes to human mobility patterns and working environments. We aimed to explore how social distancing measures affected recreational use of urban ...
    • Variation in albedo and other vegetation characteristics in non-forested northern ecosystems: the role of lichens and mosses 

      Finne, Eirik Aasmo; Bjerke, Jarle W.; Erlandsson, Rasmus; Tømmervik, Hans; Stordal, Frode; Tallaksen, Lena M. (Peer reviewed; Journal article, 2023)
      Vegetation has a profound impact on climate through complex interactions and feedback loops, where especially regulation of albedo, the ratio of reflected to incoming solar radiation, is important at high latitudes. How ...
    • Vulnerability and resilience of the carbon exchange of a subarctic peatland to an extreme winter event 

      Parmentier, Frans-Jan; Rasse, Daniel P.; Lund, Magnus; Bjerke, Jarle W.; Drake, Bert G.; Weldon, Simon Mark; Tømmervik, Hans; Hansen, Georg Heinrich (Journal article; Peer reviewed, 2018)
      Extreme winter events that damage vegetation are considered an important climatic cause of arctic browning—a reversal of the greening trend of the region—and possibly reduce the carbon uptake of northern ecosystems. ...