• A carbon balance of Norway: terrestrial and aquatic carbon fluxes 

      de Wit, Heleen; Austnes, Kari; Hylen, Gro; Dalsgaard, Lise (Journal article; Peer reviewed, 2015)
      Northern landscapes accumulate carbon in vegetation and soils while rivers transport significant amounts of land-derived carbon to coastal areas. Here, we quantify carbon sources and sinks in main ecosystems (forests, ...
    • A new broad typology for rivers and lakes in Europe: Development and application for large-scale environmental assessments 

      Solheim, Anne Lyche; Globevnik, Lidija; Austnes, Kari; Kristensen, Peter; Moe, S. Jannicke; Persson, Jonas; Phillips, Geoff; Poikane, Sandra; van de Bund, Wouter; Birk, Sebastian (Journal article; Peer reviewed, 2019)
      European countries have defined >1000 national river types and >400 national lake types to implement the EU Water Framework Directive (WFD). In addition, common river and lake types have been defined within regions of ...
    • Cleaner air reveals growing influence of climate on dissolved organic carbon trends in northern headwaters 

      de Wit, Heleen; Stoddard, John L.; Monteith, Donald T.; Sample, James E.; Austnes, Kari; Couture, Suzanne; Fölster, Jens; Higgins, Scott N.; Houle, Daniel; Hruška, Jakub; Krám, Pavel; Kopáček, Jiří; Paterson, Andrew M.; Valinia, Salar; Van Dam, Herman; Vuorenmaa, Jussi; Evans, Chris D. (Peer reviewed; Journal article, 2021)
      Surface water browning, the result of increasing concentrations of dissolved organic matter (DOM), has been widespread in northern ecosystems in recent decades. Here, we assess a database of 426 undisturbed headwater lakes ...
    • Critical limits for surface water acidification in Norwegian critical loads calculation and Water Framework Directive classification 

      Austnes, Kari; Lund, Espen (NIVA-rapport;6741, Research report, 2014)
      The objective of this study was to compare the critical limits for surface water acidification used in the critical loads calculation under the UNECE Convention on Long-range Transboundary Air Pollution and the EU Water ...
    • Critical loads and the MAGIC model. Evaluating the country-scale applications in Norway using data from the 2019 national lake survey 

      Austnes, Kari; Wright, Richard Frederic; Sample, James Edward; Clayer, Francois (NIVA-rapport;7557, Research report, 2020)
      The critical loads methodology used at the national scale in Norway and the MAGIC model as applied to the lakes in the national 1000-lake survey have been evaluated, making use of the data from the 2019 national lake survey. ...
    • Current Browning of Surface Waters Will Be Further Promoted by Wetter Climate 

      de Wit, Heleen A.; Valinia, Salar; Weyhenmeyer, Gesa A; Futter, Martyn N.; Kortelainen, Pirkko; Austnes, Kari; Hessen, Dag O; Raike, Antti; Laudon, Hjalmar; Vournenmaa, Jussi (Journal article; Peer reviewed, 2016)
      Browning of surface waters because of increasing terrestrial dissolved organic carbon (OC) concentrations is a concern for drinking water providers and can impact land carbon storage. We show that positive trends in OC in ...
    • Currently legislated decreases in nitrogen deposition will yield only limited plant species recovery in European forests 

      Dirnböck, Thomas; Pröll, Gisela; Austnes, Kari; Beloica, Jelena; Beudert, Burkhard; Canullo, Robert; De Marco, Alessandra; Fornasier, Maria Francesca; Futter, Martyn; Goergen, Klaus; Grandin, Ulf; Holmberg, Maria; Lindroos, Antti-Jussi; Mirtl, Michael; Neirynck, Johan; Pecka, Tomasz; Nieminen, Tiina Maileena; Nordbakken, Jørn-Frode; Posch, Maximilian; Reinds, Gert-Jan; Rowe, Edwin C; Salemaa, Maija; Scheuschner, Thomas; Starlinger, Franz; Uzieblo, Aldona Katarzyna; Valinia, Salar; Weldon, James; Wamelink, Wieger G W; Forsius, Martin (Journal article; Peer reviewed, 2018)
      Atmospheric nitrogen (N) pollution is considered responsible for a substantial decline in plant species richness and for altered community structures in terrestrial habitats worldwide. Nitrogen affects habitats through ...
    • Effects of nitrogen on nutrient-limitation in oligotrophic northern surface waters 

      Thrane, Jan-Erik; de Wit, Heleen; Austnes, Kari (NIVA-rapport;7680, Research report, 2021)
      Nitrogen deposition has a potentially eutrophying impact on oligotrophic freshwaters. Here we present a data analysis and a literature review with a joint focus on nitrogen (N) limitation in oligotrophic lakes and rivers. ...
    • Modellbasert klassifisering av forsuringstilstand i innsjøer uten måledata 

      Austnes, Kari; Lund, Espen; Valinia, Salar; Cosby, Bernard J. (NIVA-rapport;7047, Research report, 2016)
      Formålet med dette arbeidet var å utarbeide en områdebasert klassifisering, som kan benyttes til klassifisering av forsuringstilstand i norske innsjøer uten måledata. Områdeklassifiseringen ble basert på modellering av 990 ...
    • Modelling study of soil C, N and pH response to air pollution and climate change using European LTER site observations 

      Holmberg, Maria; Aherne, Julian; Austnes, Kari; Beloica, Jelena; De Marco, Alessandra; Dirnböck, Thomas; Fornasier, Maria Francesca; Goergen, Klaus; Futter, Martyn; Lindroos, Antti-Jussi; Krám, Pavel; Neirynck, Johan; Nieminen, Tiina Maileena; Pecka, Tomasz; Posch, Maximilian; Pröll, Gisela; Rowe, Ed C.; Scheuschner, Thomas; Schlutow, Angela; Valinia, Salar; Forsius, Martin (Journal article; Peer reviewed, 2018)
      Current climate warming is expected to continue in coming decades, whereas high N deposition may stabilize, in contrast to the clear decrease in S deposition. These pressures have distinctive regional patterns and their ...
    • Nasjonal innsjøundersøkelse 2019 

      Hindar, Atle; Garmo, Øyvind Aaberg; Austnes, Kari; Sample, James Edward (NIVA-rapport;7530, Research report, 2020)
      I denne nasjonale innsjøundersøkelsen er forsuring og eutrofiering undersøkt i 1000 innsjøer. De aller fleste av innsjøene ble prøvetatt fra helikopter i perioden 15. september og ut oktober i 2019, og det er analysert på ...
    • Organic nitrogen steadily increasing in Norwegian rivers draining to the Skagerrak coast 

      Deininger, Anne; Kaste, Øyvind; Frigstad, Helene; Austnes, Kari (Peer reviewed; Journal article, 2020)
      Declining atmospheric nitrogen (N) deposition, through reduction in the direct input of inorganic N, may result in less inorganic N being leached from soils to freshwaters (dissolved inorganic N = DIN). Declining sulphur ...
    • Overskridelser av tålegrenser for forsuring og nitrogen for Norge. Oppdatering med perioden 2012–2016 

      Austnes, Kari; Lund, Espen; Sample, James Edward; Aarrestad, Per Arild; Bakkestuen, Vegar; Aas, Wenche (NIVA-rapport;7239, Research report, 2018)
      Rapporten viser overskridelser av tålegrenser for forsuring av vann og jord, samt overgjødslingseffekter på vegetasjon, med avsetningsverdier for perioden 2012–2016. Det er kun en liten reduksjon i areal med overskridelse ...
    • Pipes or chimneys? For carbon cycling in small boreal lakes, precipitation matters most 

      de Wit, Heleen A; Couture, Raoul-Marie; Jackson-Blake, Leah; Futter, Martyn N.; Valinia, Salar; Austnes, Kari; Guerrero, Jose-Luis; Lin, Yan (Journal article; Peer reviewed, 2018)
      Are small lakes passive pipes transporting terrigenous organic carbon (dissolved organic carbon [DOC]), or chimneys for CO2 release in the landscape? Using a unique combination of 30‐yr measurements, sediment dating and ...
    • Proceedings of the 35th Task Force meeting of the ICP Waters Programme in Helsinki, June 4-6, 2019 

      Garmo, Øyvind Aaberg; Austnes, Kari; Vuorenmaa, Jussi (NIVA-rapport;7437-2019, Research report, 2019)
      Proceedings of the 35th Task Force meeting of the ICP Waters Programme in Helsinki, June 4-6, 2019. National contributions from Russia.
    • Proceedings of the 37th Task Force meeting of the ICP Waters Programme, held on-line, April 28-29, 2021 

      Garmo, Øyvind Aaberg; Furuseth, Ingvild Skumlien; Austnes, Kari (NIVA-rapport;7657, Research report, 2021)
      Proceedings of the 37th Task Force meeting of the ICP Waters Programme held on-line, April 28-29, 2021. National contributions from Italy.
    • Regional assessment of the current extent of acidification of surface waters in Europe and North America 

      Austnes, Kari; Aherne, Julian; Arle, Jens; Čičendajeva, Marina; Couture, Suzanne; Fölster, Jens; Garmo, Øyvind Aaberg; Hruska, Jakub; Monteith, Don; Posch, Max; Rogora, Michaela; Sample, James Edward; Skjelkvåle, Brit Lisa; Steingruber, Sandra; Stoddard, John L.; Ulańczyk, Rafał; Van Dam, Herman; Velasco, Manuel Toro; Vuorenmaa, Jussi; Wright, Richard Frederic; de Wit, Heleen (NIVA-rapport;7268, Research report, 2018)
      The current status of surface water acidification related to air pollution in Europe and North America has been assessed using country reports, monitoring data, critical loads and exceedance data, acid sensitivity and ...
    • Riverine inputs and direct discharges to Norwegian coastal waters – 2011 

      Skarbøvik, Eva; Stålnacke, Per; Austnes, Kari; Selvik, John Rune; Aakerøy, Paul Andreas; Tjomsland, Torulv; Høgåsen, Tore; Beldring, Stein (NIVA-rapport;6439, Research report, 2012)
      Riverine inputs and direct discharges to Norwegian coastal waters in 2011 have been estimated in accordance with the requirements of the OSPAR Commission. Due to high water discharges in 2011, the riverine inputs of both ...
    • Riverine inputs and direct discharges to Norwegian coastal waters – 2012 

      Skarbøvik, Eva; Stålnacke, Per; Austnes, Kari; Selvik, John Rune; Pengerud, Annelene; Tjomsland, Torulv; Høgåsen, Tore; Beldring, Stein (NIVA-rapport;6584, Research report, 2013)
      Riverine inputs and direct discharges to Norwegian coastal waters in 2012 have been estimated in accordance with the requirements of the OSPAR Commission. Water discharges in 2012 were lower than in 2011, but higher than ...
    • Riverine inputs and direct discharges to Norwegian coastal waters – 2013 

      Skarbøvik, Eva; Austnes, Kari; Allan, Ian; Stålnacke, Per; Høgåsen, Tore; Nemes, Attila; Selvik, John Rune; Garmo, Øyvind Aaberg; Beldring, Stein (NIVA-rapport;6738, Research report, 2014)
      Riverine inputs and direct discharges to Norwegian coastal waters in 2013 have been estimated in accordance with the requirements of the OSPAR Commission. Nutrients, metals and organic pollutants have been monitored in ...