Ansatt bilde
Heleen de Wit
dr.scient. (PhD)
Stilling: Forskningsleder
Telefon: +47 954 34 360
Seksjon: Ledelse, forskningsfaglig
Heleen de Wit har en PhD (2000) fra Landbruksuniversitet i Ås og har jobbet på NIVA siden 2004. Hun forsker på nedbørfeltprosesser i naturlige økosystemer, i forbindelse med lufttransport forurensing (sur nedbør og kvikksølv). Dette er viktig for forsuring og forurensing av overflatevann, og påvirkes av klimaendring og direkte inngrep i nedbørfeltet som skoghogst. Hun benytter overvåkingsdata fra Norge og andre land for å se på langtidstrender i nitrogen og løst organisk materiale i vann (se www.icp-waters.no). En annen interesse er karbonlagring og utvasking i terrestre økosystemer.

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Vitenskapelige artikler og bokkapitler

  1. Braaten, Hans Fredrik Veiteberg; de Wit, Heleen; Larssen, Thorjørn; Poste, Amanda; (2018) Mercury in fish from Norwegian lakes: The complex influence of aqueous organic carbon. Science of the Total Environment ISSN 0048-9697. Vol 627 s341-348 doi: 10.1016/j.scitotenv.2018.01.252
  2. de Wit, Heleen A; Couture, Raoul-Marie; Jackson-Blake, Leah; Futter, Martyn N.; Valinia, Salar; Austnes, Kari; Guerrero, Jose-Luis; Lin, Yan; (2018) Pipes or chimneys? For carbon cycling in small boreal lakes, precipitation matters most. Limnology and Oceanography Letters ISSN 2378-2242. Vol 3 No3 s275-284 doi: 10.1002/lol2.10077
  3. Lund, Espen; Garmo, Øyvind A; de Wit, Heleen A; Kristensen, Torstein; Hawley, Kate L; Wright, Richard F; (2018) Reduced Acid Deposition Leads to a New Start for Brown Trout (Salmo trutta) in an Acidified Lake in Southern Norway. Water, Air and Soil Pollution ISSN 0049-6979. Vol 229 doi: 10.1007/s11270-018-4013-9
  4. Vuorenmaa, Jussi; Augustaitis, Algirdas; Beudert, Burkhard; Bochenek, Witold; Clarke, Nicholas; de Wit, Heleen A; Dirnböck, Thomas; Frey, Jane; Hakola, Hannele; Kleemola, Sirpa; Kobler, Johannes; Krám, Pavel; Lindroos, Antti-Jussi; Lundin, Lars; Löfgren, Stefan; Marchetto, Aldo; Pecka, Tomasz; Schulte-Bisping, Hubert; Skotak, Krzysztof; Srybny, Anatoly; Szpikowski, Józef; Ukonmaanaho, Liisa; Váňa, Milan; Åkerblom, Staffan; Forsius, Martin; (2018) Long-term changes (1990–2015) in the atmospheric deposition and runoff water chemistry of sulphate, inorganic nitrogen and acidity for forested catchments in Europe in relation to changes in emissions and hydrometeorological conditions. Science of the Total Environment ISSN 0048-9697. Vol 625 s1129-1145 doi: 10.1016/j.scitotenv.2017.12.245
  5. Vuorenmaa, Jussi; Augustaitis, Algirdas; Beudert, Burkhard; Clarke, Nicholas; de Wit, Heleen; Dirnböck, Thomas; Frey, Jane; Forsius, Martin; Indriksone, Iveta; Kleemola, Sirpa; Kobler, Johannes; Kram, Pavel; Lindroos, Antti-Jussi; Lundin, Lars; Ruoho-Airola, Tuija; Ukonmaanaho, Liisa; Vána, Milan; (2017) Long-term sulphate and inorganic nitrogen mass balance budgets in European ICP Integrated Monitoring catchments (1990–2012). Ecological Indicators ISSN 1470-160X. Vol 76 s15-29 doi: 10.1016/j.ecolind.2016.12.040
  6. Strand, Line Tau; Callesen, Ingeborg; Dalsgaard, Lise; de Wit, Heleen A; (2016) Carbon and nitrogen stocks in Norwegian forest soils — the importance of soil formation, climate, and vegetation type for organic matter accumulation. Canadian Journal of Forest Research ISSN 0045-5067. Vol 46 No12 s1459-1473 doi: 10.1139/cjfr-2015-0467
  7. Finstad, Anders Gravbrøt; Andersen, Tom; Larsen, Søren; Tominaga, Koji; Blumentrath, Stefan; de Wit, Heleen A.; Tømmervik, Hans; Hessen, Dag Olav; (2016) From greening to browning: Catchment vegetation development and reduced S-deposition promote organic carbon load on decadal time scales in Nordic lakes. Scientific Reports ISSN 2045-2322. Vol 6 doi: 10.1038/srep31944
  8. de Wit, Heleen A; Ledesma, Jose L J; Futter, Martyn N.; (2016) Aquatic DOC export from subarctic Atlantic blanket bog in Norway is controlled by seasalt deposition, temperature and precipitation. Biogeochemistry ISSN 0168-2563. Vol 127 No2 s305-321 doi: 10.1007/s10533-016-0182-z
  9. 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; (2016) Current Browning of Surface Waters Will Be Further Promoted by Wetter Climate. Environmental Science and Technology Letters ISSN 2328-8930. Vol 3 No12 s430-435 doi: 10.1021/acs.estlett.6b00396
  10. Braaten, Hans Fredrik Veiteberg; de Wit, Heleen A.; (2016) Effects of disturbance and vegetation type on total and methylmercury in boreal peatland and forest soils. Environmental Pollution ISSN 0269-7491. Vol 218 s140-149 doi: 10.1016/j.envpol.2016.08.029
  11. Vries, Wim de; Posch, Maximilian; Sverdrup, Harald U.; Larssen, Thorjørn; Wit, Heleen de; Bobbink, Roland; Hettelingh, Jean-Paul; (2015) Geochemical Indicators for Use in the Computation of Critical Loads and Dynamic Risk Assessments. Environmental Pollution ISSN 1566-0745. Vol 25 s15-58 doi: 10.1007/978-94-017-9508-1_2
  12. Moiseenko, Tatiana Ivanovna; Dinu, Marina Ivanovna; Bazova, Maria Mihailovna; de Wit, Heleen; (2015) Long-term changes in the water chemistry of arctic lakes as a response to reduction of air pollution: Case study in the Kola, Russia. Water, Air and Soil Pollution ISSN 0049-6979. Vol 226 No98 doi: 10.1007/s11270-015-2310-0
  13. Couture, Raoul-Marie; de Wit, Heleen; Tominaga, Koji; Kiuru, Petri; Markelov, Igor; (2015) Oxygen dynamics in a boreal lake responds to long-term changes in climate, ice phenology, and DOC inputs. Journal of Geophysical Research - Biogeosciences ISSN 2169-8953. Vol 120 No11 s2441-2456 doi: 10.1002/2015JG003065
  14. Poste, Amanda; Braaten, Hans Fredrik Veiteberg; de Wit, Heleen; Sørensen, Kai; Larssen, Thorjørn; (2015) Effects of photodemethylation on the methylmercury budget of boreal Norwegian lakes. Environmental Toxicology and Chemistry ISSN 0730-7268. Vol 34 No6 s1213-1223 doi: 10.1002/etc.2923
  15. de Wit, Heleen; Austnes, Kari; Hylen, Gro; Dalsgaard, Lise; (2015) A carbon balance of Norway: terrestrial and aquatic carbon fluxes. Biogeochemistry ISSN 0168-2563. Vol 123 s147-173 doi: 10.1007/s10533-014-0060-5
  16. Lindholm, Markus; de Wit, Heleen; Eriksen, Tor Erik; Braaten, Hans Fredrik Veiteberg; (2014) The influence of littoral on mercury bioaccumulation in a humic lake. Water, Air and Soil Pollution ISSN 0049-6979. Vol 225 No10 doi: 10.1007/s11270-014-2141-4
  17. Garmo, Øyvind Aaberg; Skjelkvåle, Brit Lisa; de Wit, Heleen; Colombo, Luca; Curtis, Chris; Fölster, Jens; Hoffmann, Andreas; Hruška, Jakub; Høgåsen, Tore; Jeffries, Dean S.; Keller, W. Bill; Krám, Pavel; Majer, Vladimir; Monteith, Don T.; Paterson, Andrew M.; Rogora, Michela; Rzychon, Dorota; Steingruber, Sandra; Stoddard, John L.; Vuorenmaa, Jussi; Worsztynowicz, Adam; (2014) Trends in surface water chemistry in acidified areas in Europe and North America from 1990 to 2008. Water, Air and Soil Pollution ISSN 0049-6979. Vol 225 No3 s1-14 doi: 10.1007/s11270-014-1880-6
  18. de Wit, Heleen; Granhus, Aksel; Lindholm, Markus; Kainz, Martin J.; Lin, Yan; Braaten, Hans Fredrik Veiteberg; Blaszczak, Joanna; (2014) Forest harvest effects on mercury in streams and biota in Norwegian boreal catchments. Forest Ecology and Management ISSN 0378-1127. Vol 324 s52-63 doi: 10.1016/j.foreco.2014.03.044
  19. Braaten, Hans Fredrik Veiteberg; de Wit, Heleen; Harman, Christopher Peter; Hageström, Ulla; Larssen, Thorjørn; (2014) Effects of sample preservation and storage on mercury speciation in natural stream water. International Journal of Environmental Analytical Chemistry ISSN 0306-7319. Vol 94 No4 s381-384 doi: 10.1080/03067319.2013.823489
  20. Braaten, Hans Fredrik Veiteberg; de Wit, Heleen; Fjeld, Eirik; Rognerud, Sigurd; Lydersen, Espen; Larssen, Thorjørn; (2014) Environmental factors influencing mercury speciation in Subarctic and Boreal lakes. Science of the Total Environment ISSN 0048-9697. Vol 476-477 NoApril s336-345 doi: 10.1016/j.scitotenv.2014.01.030
NIVA begynte å registrere vitenskapelige artikler i CRIStin i 2010, rapporter fra 2014.

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