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  • 1. Anderson, L. G.
    et al.
    Björk, G.
    Holby, Ola
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Kattner, G.
    Koltermann, P. K.
    Jones, E. P.
    Lindegren, R.
    Rudels, B.
    Swift, J.
    Water masses and circulation in the Eurasien Basin: Results from the Oden 91 expedition1994In: Journal of Geophysical Research, Vol 99, No. C2: 3273-3283Article in journal (Refereed)
  • 2.
    Anderson, Leif G.
    et al.
    Univ Gothenburg, Dept Marine Sci, POB 461, S-40530 Gothenburg, Sweden..
    Björk, Göran
    Univ Gothenburg, Dept Marine Sci, POB 461, S-40530 Gothenburg, Sweden..
    Holby, Ola
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Jutterstrom, Sara
    IVL Swedish Environm Res Inst, Box 530 21, S-40014 Gothenburg, Sweden..
    Morth, Carl Magnus
    Stockholm Univ, Dept Geol Sci, S-10691 Stockholm, Sweden..
    O'Regan, Matt
    Stockholm Univ, Dept Geol Sci, S-10691 Stockholm, Sweden..
    Pearce, Christof
    Stockholm Univ, Dept Geol Sci, S-10691 Stockholm, Sweden.;Aarhus Univ, Dept Geosci, Aarhus, Denmark..
    Semiletov, Igor
    Univ Alaska Fairbanks, Int Arctic Res Ctr, Fairbanks, AK 99775 USA.;Russian Acad Sci, Far Eastern Branch, Pacific Oceanol Inst, Vladivostok 690041, Russia.;Natl Res Tomsk Polytech Univ, Tomsk, Russia..
    Stranne, Christian
    Ctr Coastal & Ocean Mapping, Joint Hydrog Ctr, Durham, NH 03824 USA..
    Stoven, Tim
    GEOMAR, Helmholtz Ctr Ocean Res Kiel, Kiel, Germany..
    Tanhua, Toste
    GEOMAR, Helmholtz Ctr Ocean Res Kiel, Kiel, Germany..
    Ulfsbo, Adam
    Univ Gothenburg, Dept Marine Sci, POB 461, S-40530 Gothenburg, Sweden.;Duke Univ, Nicholas Sch Environm, Div Earth & Ocean Sci, Durham, NC 27704 USA..
    Jakobsson, Martin
    Stockholm Univ, Dept Geol Sci, S-10691 Stockholm, Sweden..
    Shelf-Basin interaction along the East Siberian Sea2017In: Ocean Science, ISSN 1812-0784, E-ISSN 1812-0792, Vol. 13, no 2, p. 349-363Article in journal (Refereed)
    Abstract [en]

    Extensive biogeochemical transformation of organic matter takes place in the shallow continental shelf seas of Siberia. This, in combination with brine production from sea-ice formation, results in cold bottom waters with relatively high salinity and nutrient concentrations, as well as low oxygen and pH levels. Data from the SWERUS-C3 expedition with icebreaker Oden, from July to September 2014, show the distribution of such nutrient-rich, cold bottom waters along the continental margin from about 140 to 180 degrees E. The water with maximum nutrient concentration, classically named the upper halocline, is absent over the Lomonosov Ridge at 140 degrees E, while it appears in the Makarov Basin at 150 degrees E and intensifies further eastwards. At the intercept between the Mendeleev Ridge and the East Siberian continental shelf slope, the nutrient maximum is still intense, but distributed across a larger depth interval. The nutrient-rich water is found here at salinities of up to similar to 34.5, i.e. in the water classically named lower halocline. East of 170 degrees E transient tracers show significantly less ventilated waters below about 150 m water depth. This likely results from a local isolation of waters over the Chukchi Abyssal Plain as the boundary current from the west is steered away from this area by the bathymetry of the Mendeleev Ridge. The water with salinities of similar to 34.5 has high nutrients and low oxygen concentrations as well as low pH, typically indicating decay of organic matter. A deficit in nitrate relative to phosphate suggests that this process partly occurs under hypoxia. We conclude that the high nutrient water with salinity similar to 34.5 are formed on the shelf slope in the Mendeleev Ridge region from interior basin water that is trapped for enough time to attain its signature through interaction with the sediment.

  • 3. Anderson, Leif G.
    et al.
    Holby, Ola
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Ohlson, Mats
    Lindegren, Roger
    The transport of anthropogenic carbon dioxid into the Weddell sea1991In: Journal of Geophysical Research, Vol 96, No. C9: 16,679-16,687Article in journal (Refereed)
  • 4. Barker Jørgensen, Bo
    et al.
    Nørh Glud, Ronnie
    Holby, Ola
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Oxygen distribution and bioirrigation in Artic fjord sediments (Svalbard, Barents Sea)2005In: Mar. Ecol. Prog. Ser. 292:85-95Article in journal (Refereed)
  • 5. Fones, G.R.
    et al.
    Davison, W.
    Holby, Ola
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Jørgensen, B.B.
    Thamdrup, B
    High-resolution metal gradients measured by In Situ DGT/DET deployment in Black Sea sediments using an autonomous benthic lander2001In: Limnol. Oceanogr. 46(4):982-988Article in journal (Refereed)
  • 6. Greeff, Oliver
    et al.
    Nørh Glud, Ronnie
    Gundersen, Jens
    Holby, Ola
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Barker Jørgensen, Bo
    A benthic lander for tracer studies in the sea bed: in situ measurements of sulfate reduction1998In: Continental shelf research. 18:1581-1594Article in journal (Refereed)
  • 7. Hall, P.
    et al.
    Anderson, L.
    Holby, Ola
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Kollberg, S.
    Samuelsson, M.-O.
    Chemical fluxes and mass balances in a marine fish cage farm1990In: Carbon. Mar. Ecol. Progr. Ser. 61 : 61-73Article in journal (Refereed)
  • 8. Hall, P.
    et al.
    Holby, Ola
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Kollberg, S.
    Samuelsson, M.-O.
    Chemical fluxes and mass balances in a marine fish cage farm1992In: Nitrogen. Mar. Ecol. Progr. Ser. 89 : 81-91Article in journal (Refereed)
  • 9.
    Holby, Ola
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Biogeochemical processes in fish farm deposits and Weddell Sea sediments1991Report (Other academic)
  • 10.
    Holby, Ola
    et al.
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Anderson, Leif G.
    Geochemistry in an area recently uncovered from the Filchner Ice Shelf1996In: Continental Shelf Research,Vol. 16, No11, pp. 1479-1488Article in journal (Refereed)
  • 11.
    Holby, Ola
    et al.
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Evans, Sverker
    The vertical distribution of Chernobyl-derived radionuclides in a Baltic Sea sediment1996In: Journal of Environmental Radioactivity, Vol 33, No. 2, pp.129-145Article in journal (Refereed)
  • 12.
    Holby, Ola
    et al.
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Hall, P.
    Chemical fluxes and mass balances in a marine fish cage farm1991In: II. Phosphorus. Mar. Ecol. Progr. Ser. 70: 263-272Article in journal (Refereed)
  • 13.
    Holby, Ola
    et al.
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Hall, Per O.J.
    Chemical fluxes and mass balances for a marine fish cage farm1994In: Silicon. Aquaculture 120: 305-318Article in journal (Refereed)
  • 14.
    Holby, Ola
    et al.
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Sachs, Oliver
    Sauter, Eberhard J
    Schlueter, Michael
    Rutgers van der Loeff, Michiel M
    Jerosch, Kerstin
    Benthic organic carbon flux and oxygen penetration reflect different plankton provinces in the Southern Ocean2009In: Deep Sea Research Part I: Oceanographic Research Papers, ISSN 0967-0637, E-ISSN 1879-0119, Vol. 56, no 8, p. 1319-1335Article in journal (Refereed)
  • 15.
    Holby, Ola
    et al.
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Tengberg, A.
    De Bovee, F.
    Hall, P.
    Berelson, W.
    Chadwick, D.
    Cicceri, G.
    Crassous, P.
    Devol, A.
    Emerson, S.
    Glud, R.
    Graziottin, F.
    Gundersen, J.
    Hammond, D.
    Helder, W.
    Hinga, K.
    Holby, O.
    Jahnke, R.
    Khripounoff, A.
    Khripounoff, A.
    Lieberman, S.
    Nuppenau, V.
    Pfannkuche, O.
    Benthic chamber and profiling landers in oceanography - A review of design, technical solutions and functioning1995In: Prog. Oceanog. Vol 35:253-294Article in journal (Refereed)
  • 16. Landén, Angela
    et al.
    Holby, Ola
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Hall, Per
    Determination of biogenic silica in marine sediments - Selection of pretreatment method and effect of sample size1996In: Vatten 52:85-92Article in journal (Refereed)
  • 17. Nørh Glud, Ronnie
    et al.
    Gundersen, Jens Kristian
    Holby, Ola
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Benthic in situ respirationin the upwelling area off central Chile1999In: Mar. Ecol. Prog. Ser. 186: 9-18Article in journal (Refereed)
  • 18. Nørh Glud, Ronnie
    et al.
    Holby, Ola
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Hoffman, Friedrike
    Canfield, Don
    Benthic mineralisation and exchange in arctic sediments (Svalbard, Norway)1998In: Mar. Ecol. Prog. Ser. 173: 237-251Article in journal (Refereed)
  • 19. Sandberg, Maria
    et al.
    Holby, Ola
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Black liquor and alkaline shocks in a multiple stage Biological tratment plant2008In: J. Environ. Eng. Sci. 7(4):335-344Article in journal (Refereed)
  • 20.
    Sandberg, Maria
    et al.
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Holby, Ola
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Black Liquor and Alkaline Shocks in a Multiple Stage Biological Treatment Plant2008In: Journal of Environmental Engineering and Science, ISSN 1496-2551, E-ISSN 1496-256X, Vol. 7, no 4, p. 335-344Article in journal (Refereed)
    Abstract [en]

    To find the impact that alkaline and black liquor spills have on multiple stage biological treatment plants, trials were made in a MultiBio lab-scale treatment plant. It was shown that the concentration of black liquor was diluted between the multiple stages. The initial bacterial stages were inhibited by high concentration of black liquor but recovered when the concentration decreased. Low pH in the feed contaminated with black liquor gave less inhibition than high pH. In a MultiBio treatment plant the active sludge stages, which are sensitive to toxic spills, are placed after the fast growing bacterial stages and are therefore protected. During normal conditions the activated sludge stages receive low concentrations of biodegradable COD. During the trials extra COD in the form of diluted black liquor induced the COD reduction. To evaluate the results, measured concentrations were compared with a computer model.

  • 21. Schlüter, Michael
    et al.
    van der Loeff, Michiel M. Rutgers
    Holby, Ola
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Kuhn, Gerhard
    Silica Cycle in Surface Sediments of the South Atlantic1996In: Deep Sea research. 45: 1085-1109Article in journal (Refereed)
  • 22.
    Stoica, Alina
    et al.
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Sandberg, Maria
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Holby, Ola
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Energy Use and Recovery Strategies within Wastewater Treatment and Sludge Handling at Pulp and Paper Mills2009In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 100, no 14, p. 3497-3505Article in journal (Refereed)
    Abstract [en]

    This paper presents an inclusive approach with focus on energy use and recovery in wastewater management, including wastewater treatment (WWT) and sludge handling. Process data from three Swedish mills and a mathematical model were used to evaluate seven sludge handling strategies. The results indicate that excess energy use in WWT processes counters the potential energy recovery in the sludge handling systems. Energy use in WWT processes is recommended to aim for sufficient effluent treatment, not for sludge reduction. Increased secondary sludge production is favourable from an energy point of view provided it is used as a substrate for heat, biogas or electricity production.

  • 23. Wenzhöfer, Frank
    et al.
    Holby, Ola
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Glud, Ronnie N.
    Nielsen, Helle K.
    Gundersen, Jens K.
    In situ microsensor studies of a shallow water hydrothermal vent at Milos, Greece2000In: Marine Chemistry. 69: 43-54Article in journal (Refereed)
  • 24. Wenzhöfer, Frank
    et al.
    Holby, Ola
    Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
    Kohls, Oliver
    Deep penetrating benthic oxygen profiles measured in situ by oxygen optodes2001In: Deep-Sea Research I 48: 1741-1755(In press, Deep Sea Research)Article in journal (Refereed)
1 - 24 of 24
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