• Atmospheric deposition and lateral transport of mercury in Norwegian drainage basins: A mercury budget for Norway 

      Braaten, Hans Fredrik Veiteberg; Gundersen, Cathrine Brecke; Sample, James Edward; Selvik, John Rune; de Wit, Heleen (NIVA-rapport;7310, Research report, 2018)
      Reduced atmospheric loading of mercury (Hg) can improve the environmental status of freshwaters and coastal ecosystems. Sparse data limit impact assessments of changes in atmospheric Hg on aquatic ecosystems. Here, a Hg ...
    • Biogeochemical consequences of an oxygenated intrusion into an anoxic fjord 

      Pakhomova, Svetlana; Braaten, Hans Fredrik Veiteberg; Yakushev, Evgeny; Skei, Jens (Journal article; Peer reviewed, 2014)
      Background: This paper is based on the studies of the biogeochemical structure of the water column in the anoxic Fjord Hunnbunn (south-eastern Norway) performed in 2009, 2011 and 2012. This Fjord is an enclosed basin of ...
    • Effects of disturbance and vegetation type on total and methylmercury in boreal peatland and forest soils 

      Braaten, Hans Fredrik Veiteberg; de Wit, Heleen A. (Journal article; Peer reviewed, 2016)
      Mercury (Hg) concentrations in freshwater fish relates to aquatic Hg concentrations, which largely derives from soil stores of accumulated atmospheric deposition. Hg in catchment soils as a source for aquatic Hg is poorly ...
    • Effects of organic matter addition on methylmercury formation in capped and uncapped marine sediments 

      Ndungu, Kuria; Schaanning, Morten; Braaten, Hans Fredrik Veiteberg (Journal article; Peer reviewed, 2016)
      In situ subaqueous capping (ISC) of contaminated marine sediments is frequently proposed as a feasible and effective mitigation option. However, though effective in isolating mercury species migration into overlying water, ...
    • Effects of sample preparation on methylmercury concentrations in arctic organisms 

      Braaten, Hans Fredrik Veiteberg; Harman, Christopher Peter; Øverjordet, Ida Beathe; Larssen, Thorjørn (Journal article; Peer reviewed, 2014)
      The biogeochemical cycling of mercury (Hg) in the marine environment is an issue of global concern, as consumption of marine fish is a major route of human exposure to the toxic specie methylmercury (MeHg). The most widely ...
    • Effects of sample preservation and storage on mercury speciation in natural stream water 

      Braaten, Hans Fredrik Veiteberg; de Wit, Heleen; Harman, Christopher Peter; Hageström, Ulla; Larssen, Thorjørn (Journal article; Peer reviewed, 2014)
      Despite an increasing focus on low level methods for determination of mercury species in water over the last decades, few studies have paid attention to direct effects of different sample preparation methods (i.e. preservation ...
    • Environmental factors influencing mercury speciation in Subarctic and Boreal lakes 

      Braaten, Hans Fredrik Veiteberg; de Wit, Heleen; Fjeld, Eirik; Rognerud, Sigurd; Lydersen, Espen; Larssen, Thorjørn (Journal article; Peer reviewed, 2014)
      Environmental drivers of total mercury (TotHg) concentrations, methylmercury (MeHg) concentrations, and MeHg fractions (a proxy for methylation potential, expressed as %MeHg) were assessed in a synoptic study of 51 lakes ...
    • Five decades of declining methylmercury concentrations in boreal foodwebs suggest pivotal role for sulphate deposition 

      Braaten, Hans Fredrik Veiteberg; Lindholm, Markus; de Wit, Heleen (Peer reviewed; Journal article, 2020)
      Widespread declines in mercury (Hg) in fish in pristine lakes in Fennoscandia since the 1970s are unexplained. Interactions between climate, atmospheric deposition, and elemental cycling of carbon (C), sulphur (S) and Hg ...
    • Forest harvest effects on mercury in streams and biota in Norwegian boreal catchments 

      de Wit, Heleen; Granhus, Aksel; Lindholm, Markus; Kainz, Martin J.; Lin, Yan; Braaten, Hans Fredrik Veiteberg; Blaszczak, Joanna (Journal article; Peer reviewed, 2014)
      Forest harvesting practices can potentially increase mercury run-off from catchments. A paired catchment experiment was conducted in a boreal forest in southern Norway, to test effects of forest harvest operations on (i) ...
    • Formation and availability of methylmercury in mercury-contaminated sediment: effects of activated carbon and biochar amendments 

      Sørmo, Erlend; Silvani, Ludovica; Braaten, Hans Fredrik Veiteberg; Bryntesen, Tina; Eek, Espen; Cornelissen, Gerard (Peer reviewed; Journal article, 2022)
      Purpose As the formation of toxic and bioaccumulative methylmercury (MeHg) in Hg-contaminated sediments is of great concern worldwide, suitable remediation options are needed. Activated carbon (AC) amendment is a contested ...
    • Implications of Coastal Darkening for Contaminant Transport, Bioavailability, and Trophic Transfer in Northern Coastal Waters 

      McGovern, Maeve; Evenset, Anita; Borgå, Katrine; Wit, Heleen de; Braaten, Hans Fredrik Veiteberg; Hessen, Dag Olav; Schultze, Sabrina; Ruus, Anders; Poste, Amanda (Journal article; Peer reviewed, 2019)
      The increased transport of terrestrially derived organic material (tOM) from catchments to rivers and lakes is leading to browning of northern freshwaters.(1) Although the same environmental drivers can be expected to lead ...
    • Improved Environmental Status: 50 Years of Declining Fish Mercury Levels in Boreal and Subarctic Fennoscandia 

      Braaten, Hans Fredrik Veiteberg; Åkerblom, Staffan; Kahilainen, Kimmo Kalevi; Rask, Martti; Vuorenmaa, Jussi; Mannio, Jaakko; Malinen, Tommi; Lydersen, Espen; Poste, Amanda; Amundsen, Per-Arne; Kashulin, Nikolai; Kashulina, Tatiana; Terentjev, Petr; Christensen, Guttorm; de Wit, Heleen (Journal article; Peer reviewed, 2019)
      Temporally (1965–2015) and spatially (55°–70°N) extensive records of total mercury (Hg) in freshwater fish showed consistent declines in boreal and subarctic Fennoscandia. The database contains 54 560 fish entries (n: pike ...
    • Mercury in fish from Norwegian lakes: The complex influence of aqueous organic carbon 

      Braaten, Hans Fredrik Veiteberg; de Wit, Heleen; Larssen, Thorjørn; Poste, Amanda (Journal article; Peer reviewed, 2018)
      Mercury (Hg) concentrations in water and biota are often positively correlated to organic matter (OM), typically measured as total or dissolved organic carbon (TOC/DOC). However, recent evidence suggests that higher OM ...
    • Mercury isotope analysis of sediments from Gunneklevfjorden – Method evaluation and a preliminary investigation of sources 

      Braaten, Hans Fredrik Veiteberg; Johnson, Nathan W; Clayer, Francois; Beylich, Bjørnar; Håvardstun, Jarle; Schaanning, Morten; Olsen, Marianne (NIVA-rapport;7417, Research report, 2019)
      Gunneklevfjorden in south Norway is an aquatic system where the pollution history includes decades of local industry releases and emissions. An accurate estimate of the importance of ongoing and historic sources is critical ...
    • Mercury Risk Evaluation, Risk Management and Risk Reduction Measures in the Arctic (ARCRISK) – Inception Report 

      Gundersen, Cathrine Brecke; Braaten, Hans Fredrik Veiteberg; Steindal, Eirik Hovland; Moe, S. Jannicke; Yakushev, Evgeniy; Christensen, Guttorm; Kirk, Jane; Hintelmann, Holger; Frolova, Natalia; Terentjev, Petr; Roberts, Sarah (NIVA-rapport;7489, Research report, 2020)
      The project “Risk evaluation, risk reduction and risk management action plans for mercury in the Arctic – a circumpolar management approach” (ARCRISK) has been developed to address mercury pollution in the Arctic. The main ...
    • Mercury–Organic Matter Interactions in Soils and Sediments: Angel or Devil? 

      He, Mei; Tian, Lei; Braaten, Hans Fredrik Veiteberg; Wu, Qingru; Luo, Jie; Cai, Li-Mei; Meng, Jiang-Hui; Lin, Yan (Journal article; Peer reviewed, 2019)
      Many studies have suggested that organic matter (OM) substantially reduces the bioavailability and risks of mercury (Hg) in soils and sediments; however, recent reports have supported that OM greatly accelerates Hg methylation ...
    • Methylmercury biomagnification in an Arctic pelagic food web 

      Ruus, Anders; Øverjordet, Ida Beathe; Braaten, Hans Fredrik Veiteberg; Evenset, Anita; Christensen, Guttorm N.; Heimstad, Eldbjørg Sofie; Gabrielsen, Geir W.; Borgå, Katrine (Journal article; Peer reviewed, 2015)
      Mercury (Hg) is a toxic element that enters the biosphere from natural and anthropogenic sources, and emitted gaseous Hg enters the Arctic from lower latitudes by long-range transport. In aquatic systems, anoxic conditions ...
    • Miljøundersøkelse i Aulivassdraget, konsekvenser av brannen ved Revac AS i 2014 

      Fjeld, Eirik; Allan, Ian; Bæk, Kine; Garmo, Øyvind Aaberg; Lund, Espen; Moe, Therese Fosholt; Persson, Jonas; Thaulow, Jens; Braaten, Hans Fredrik Veiteberg (NIVA-rapport;6757, Research report, 2014)
      En brann i et utendørs lager av plast iblandet fraksjoner av elektronikkavfall ved resirkuleringsanlegget til Revac AS i Vestfold 21. juli 2014 førte til utslipp av forurenset slukkevann i Aulivassdraget – med påfølgende ...
    • The Norwegian river monitoring programme 2019 – water quality status and trends 

      Braaten, Hans Fredrik Veiteberg; Gundersen, Cathrine Brecke; Kaste, Øyvind; Sample, James Edward; Hjermann, Dag Øystein; Norling, Magnus Dahler; Guerrero, Jose-Luis; Allan, Ian; Nizzetto, Luca (NIVA-rapport;7564, Research report, 2020)
      In the Norwegian River Monitoring Programme (in Norwegian: Elveovervåkingsprogrammet) 20 rivers along the Norwegian coastline are monitored for chemical and hydrological parameters. It is a continuation of river monitoring ...
    • The Norwegian river monitoring programme – water quality status and trends in 2018 

      Gundersen, Cathrine Brecke; Kaste, Øyvind; Sample, James Edward; Braaten, Hans Fredrik Veiteberg; Selvik, John Rune; Hjermann, Dag Øystein; Norling, Magnus Dahler; Guerrero, Jose-Luis (NIVA-rapport;7441, Research report, 2019)
      In the Norwegian River Monitoring Programme (Elveovervåkingsprogrammet) 20 rivers along the Norwegian coastline are monitored for chemical and hydrological parameters. It is a continuation of a former monitoring programme, ...