Rolf David Vogt

• Engebretsen, Alexander Melvold; Vogt, Rolf David & Bechmann, Marianne (2019). SWAT model uncertainties and cumulative probability for decreased phosphorus loading by agricultural Best Management Practices. CATENA.  ISSN 0341-8162.  175, s 154- 166 . doi: 10.1016/j.catena.2018.12.004 Show summary

  Effects of mitigation measures in agriculture on abating eutrophication are difficult to evaluate by assessments of catchment monitoring data. Estimates of improved water quality by specific agricultural Best Management Practices (BMPs) are therefore often dependent on simulation modeling. A main objective was thus to assess the probable reductions in total phosphorus (TP) loading achieved by implemented agricultural mitigation measures. The case-study site was a catchment in southeastern Norway. Simulation modeling was conducted by use of The Soil and Water Assessment Tool (SWAT). The aim of this present study was to understand the model uncertainty associated both with calibration/validation (baseline) and TP loading scenarios based on BMP. The modeled decrease in TP loading by the set of implemented BMPs was assessed by comparing simulated baseline output with output where the set of abatement actions were removed. The model was set up for the years 2006–2010 and calibrated against observed monitoring data, including daily discharge, sediment- and TP fluxes. Model simulations were performed including and excluding the implemented set of mitigation measures. The simulated set of mitigation measures include decrease in amount of phosphorus fertilization, establishment of vegetated buffer strips along streams and constructed wetlands in the water courses, no autumn tilling and removal of point TP sources from scattered dwellings. Model calibration and uncertainty estimation are performed using an algorithm for Sequential Uncertainty Fitting (SUFI2; ver. 2). Probabilistic risk for given magnitudes of increased TP loading if existing BMPs were not implemented was assessed. Using this novel approach it was possible to state, with a 80th percentile confidence level, that the average annual TP loading would have been about 26% higher if no mitigation measures were implemented in the catchment. This was possible to assess even though the difference between baseline and BMP scenario was not significant.

• Han, Xiaoxin; Lu, Xueqiang & Vogt, Rolf David (2019). An optimized density-based approch for extracting microplastic from soil and sediment samples. Environmental Pollution (1987).  ISSN 0269-7491.  254, s 1- 7 . doi: 10.1016/j.envpol.2019.113009
• Li, Jinxing; Song, Yuchao; Vogt, Rolf David; Liu, Yuankun; Luo, Jipeng & Li, Tingqiang (2019). Bioavailability and cytotoxicity of Cerium- (IV), Copper- (II), and Zinc oxide nanoparticles to human intestinal and liver cells through food. Science of the Total Environment.  ISSN 0048-9697.  702(134700) . doi: 10.1016/j.scitotenv.2019.134700
• Lu, Xueqiang; Vogt, Rolf David; Li, Haixiao; Han, Suqin; Mo, Xunqiang; Zhang, Yufen; Ullah, Sami; Chen, Chen; Han, Xiaoxin; Li, Hongyuan & Seip, Hans Martin (2019). China’s ineffective plastic solution to haze. Science.  ISSN 0036-8075.  364(6446), s 1145- 1145 . doi: 10.1126/science.aax5674
• Gundersen, Cathrine Brecke; Andersen, Tom; Vogt, Rolf David & Allison, Steven D. (2018). Growth response of environmental bacteria under exposure to nitramines from CO2-capture. International Journal of Greenhouse Gas Control.  ISSN 1750-5836.  79, s 248- 251 . doi: 10.1016/j.ijggc.2018.11.003
• Orderud, Geir; Vogt, Rolf David; Tan, Hongze & Luo, Jing (2018). Interdisciplinary research and transdisciplinary processes for environmental management under different socio-natural conditions. International Journal of Environmental Studies.  ISSN 0020-7233.  75(5), s 827- 846 . doi: 10.1080/00207233.2017.1406730 Show summary

  Interdisciplinary research and transdisciplinary processes as part of environmental management respond to the increasing complexity of socio-natural changes in recent decades. Two similar studies of eutrophication in raw water reservoirs for drinking water Production in Norway and China are used to discuss interdisciplinary Research and transdisciplinary processes organised through the DPSIR framework (drivers, pressures, states, impacts, and responses) as instruments for environmental management. The conclusion is that interdisciplinary research and transdisciplinary processes can enhance the understanding of complex socio-natural processes under distinctly different institutional systems. The DPSIR framework was not necessary for achieving the desired result.

• Gundersen, Cathrine Brecke; Breedveld, Gijs D.; Foseid, Lena & Vogt, Rolf David (2017). Soil sorption of two nitramines derived from amine-based CO2 capture. Environmental Science: Processes & Impacts.  ISSN 2050-7887.  19(6), s 812- 821 . doi: 10.1039/c7em00131b Show summary

  Nitramines are potentially carcinogens that form from the amines used in post-combustion CO2 capture (PCCC). The soil sorption characteristics of monoethanol (MEA)- and dimethyl (DMA)-nitramines have been assessed using a batch experimental setup, and defined indirectly by measuring loss of nitramine (LC-MS/MS) from the aqueous phase (0.01 M CaCl2 and 0.1% NaN3) after equilibrium had been established with the soil (24 h). Nitramine soil sorption was found to be strongly dependent on the content of organic matter in the soil (r2 = 0.72 and 0.95, p < 0.05). Soil sorption of MEA-nitramine was further influenced by the quality of the organic matter (Abs254 nm, r2 = 0.93, p < 0.05). This is hypothesized to be due to the hydroxyl group on the MEA-nitramine, capable of forming hydrogen bonds with acidic functional groups on the soil organic matter. Estimated organic carbon normalized soil–water distribution coefficients (KOC) are relatively low, and within the same range as for simple amines. Nevertheless, considering the high content of organic matter commonly found in the top layer of a forest soil, this is where most of the nitramines will be retained. Presented data can be used to estimate final concentrations of nitramines in the environment following emissions from amine-based PCCC plants.

• Orderud, Geir; Vogt, Rolf David; Andersen, Tom & Luo, Jing (2017). 解释和理解中国农业中的环保行动* —— 以天津市于桥水库为例 Explaining and understanding environmental actions in Chinese agriculture – the case of Yuqiao watershed of Tianjin Municipality. International Social Science Journal (Chinese Edition).  ISSN 1002-4913.  34(1), s 131- 151
• Orderud, Geir; Vogt, Rolf David; Tan, Hongze & Luo, Jing (2017). The Role of Information and Knowledge in Achieving Environmentally Sound Farming: A Chinese Case. Chinese Journal of Urban and Environmental Studies.  ISSN 2345-7481.  5(2) . doi: 10.1142/S2345748117500117
• Su, Ming; Jia, Dongmin; Yu, Jianwei; Vogt, Rolf David; Wang, Jingshi; An, Wei & Yang, Min (2017). Reducing production of taste and odor by deep-living cyanobacteria in drinking water reservoirs by regulation of water level. Science of the Total Environment.  ISSN 0048-9697.  574, s 1477- 1483 . doi: 10.1016/j.scitotenv.2016.08.134
• Wang, Yajing; Guo, Jingheng; Vogt, Rolf David; Mulder, Jan; Wang, Jingguo & Zhang, Xiaoshan (2017). Soil pH as the chief modifier for regional nitrous oxide emissions: New evidence and implications for global estimates and mitigation. Global Change Biology.  ISSN 1354-1013.  24(2), s e617- e626 . doi: 10.1111/gcb.13966 Show summary

  Nitrous oxide (N2O) is a greenhouse gas that also plays the primary role in stratospheric ozone depletion. The use of nitrogen fertilizers is known as the major reason for atmospheric N2O increase. Empirical bottom-up models therefore estimate agricultural N2O inventories using N loading as the sole predictor, disregarding the regional heterogeneities in soil inherent response to external N loading. Several environmental factors have been found to influence the response in soil N2O emission to N fertilization, but their interdependence and relative importance have not been addressed properly. Here, we show that soil pH is the chief factor explaining regional disparities in N2O emission, using a global meta-analysis of 1,104 field measurements. The emission factor (EF) of N2O increases significantly (p < .001) with soil pH decrease. The default EF value of 1.0%, according to IPCC (Intergovernmental Panel on Climate Change) for agricultural soils, occurs at soil pH 6.76. Moreover, changes in EF with N fertilization (i.e. DEF) is also negatively correlated (p < .001) with soil pH. This indicates that N2O emission in acidic soils is more sensitive to changing N fertilization than that in alkaline soils. Incorporating our findings into bottom-up models has significant consequences for regional and global N2O emission inventories and reconciling them with those from top-down models. Moreover, our results allow region-specific development of tailor-made N2O mitigation measures in agriculture.

• Zhao, Wenxi; Li, Yanying; Jiao, Yongjie; Zhou, Bin; Vogt, Rolf David; Liu, Honglei; Ji, Min; Ma, Zhe; Li, Anding; Zhou, Beihai & Xu, Yaping (2017). Spatial and temporal variations in environmental variables in relation to phytoplankton community structure in a eutrophic river reservoir. Water.  ISSN 2073-4441.  9:754(10), s 1- 15 . doi: 10.3390/w9100754 Full text in Research Archive.
• Barton, David N; Andersen, Tom; Bergland, Olvar; Engebretsen, Alexander; Moe, S. Jannicke; Orderud, Geir I; Tominaga, Koji; Romstad, Eirik & Vogt, Rolf D (2016). Eutropia: Integrated Valuation of Lake Eutrophication Abatement Decisions Using a Bayesian Belief Network, In Zachary P. Neal (ed.),  The Routledge Handbook of Applied System Science.  Routledge.  ISBN 978-0415843324.  14.  s 297 - 320 Show summary

  The term “integrated valuation” is defined and its relevance is discussed in terms of bridging the gap between cost-effectiveness analysis and economic valuation in the implementation of the European Union Water Framework Directive. We demonstrate how to integrate benefit valuation with the ecosystem services cascade framework using an Object-Oriented Bayesian Network (OOBN). The OOBN is then used to assess the benefits of nutrient abatement measures across a cascade of submodels of the driver-pressure-state-impact-response (DPSIR) chain for the Vanemfjord lake in Morsa catchment in south-eastern Norway. The lake is part of a complex lake system in a semi-urbanized catchment dominated by forest and agriculture. The catchment has highly variable seasonal climatic conditions affecting nutrient run-off and algal blooms. It has been one of the most eutrophic lakes in Norway with periodic cyanobacteria blooms, but continues to attract a large recreational user population, despite the large variations in water quality. The “DPSIR-OOBN” model is used as a case study of “integrated valuation” and evaluated for its applicability for decision support in nutrient abatement. We find that the DPSIR-OOBN model meets seven of the nine criteria we propose for “integrated valuation”. The model struggles to meet the criteria that ecological, social and economic values should be defined consistently in relation to impacts on lake quality. While the DPSIR-OOBN integrates from valuation methods across an ecosystem cascade to management alternatives, it is neither a full benefit-cost analysis, nor a multi-criteria analysis. However, we demonstrate how the DPSIR-OOBN can be used to explore issues of consistency in scaling and weighting of different ecological, social and economic values in the catchment system. Bayesian belief networks offer a consistent approach to analysing how management implementation probability may determine economic valuation. We discuss the implication of our integrated valuation not being able to account for farmer responses, in particular the incentive effects of the model not being able to predict abatement effectiveness and value. The resolution of the nutrient monitoring data and modeling technologies that were at our disposal are probably better in the Morsa catchment than for any other catchment of this size in Norway. We therefore conclude that using our integrated valuation model for assessing benefits of eutrophication abatement measures as part of the EU Water Framework Directive still lies in the realm of utopia – euphemistically speaking a “eutropia”.

• Lü, Changwei; He, Jiang; Zuo, Le; Vogt, Rolf David; Zhu, Liang; Zhou, Bin; Mohr, Christian Wilhelm; Guan, Rui; Wang, Weiying & Yan, Daohao (2016). Processes and their explanatory factors governing distribution of organic phosphorous pools in lake sediments. Chemosphere.  ISSN 0045-6535.  145, s 125- 134
• Lu, Changwei; Wang, Bing; He, Jiang; Vogt, Rolf David; Zhou, Bin; Guan, Rui; Zuo, Le; Wang, Weiying; Xie, Zhilei; Wang, Jinghua & Yan, Daohao (2016). Responses of Organic Phosphorus Fractionation to Environmental Conditions and Lake Evolution. Environmental Science and Technology.  ISSN 0013-936X.  50(10), s 5007- 5016 . doi: 10.1021/acs.est.5b05057
• Orderud, Geir & Vogt, Rolf David (2016). Environmental values and attitudes among farmers in China – a case study in the watershed of Yuqiao reservoir of Tianjin Municipality, China. International Journal of Environmental Studies.  ISSN 0020-7233.  73(6), s 917- 938 . doi: 10.1080/00207233.2016.1220699 Show summary

  Failure to curb water pollution in China brings to the fore the issue of environmental values and attitudes among Chinese farmers. Applying the New Ecological Paradigm Scale this study finds that the pro-environmental value of New Ecological Paradigm (NEP) Worldview has a stronger standing among the studied Chinese farmers than the Dominant Social Paradigm (DSP) Worldview

• Zhou, Bin; Xu, Yaping; Vogt, Rolf David; Lu, Xueqiang; Li, Xuemei; Deng, Xiaowen; Yue, Ang & Zhu, Liang (2016). Effects of Land Use Change on Phosphorus Levels in Surface Waters—a Case Study of a Watershed Strongly Influenced by Agriculture. Water, Air and Soil Pollution.  ISSN 0049-6979.  227(160) . doi: 10.1007/s11270-016-2855-6 Show summary

  Phosphorus (P) loss from diffuse sources remains as the main cause of freshwater eutrophication in agricultural regions. The amount of land used for different agricultural practices may be a strong explanatory factor for the P loading to runoff waters. A prerequisite is that the effect of changes in land use on P levels in surface waters needs to be ascertained and quantified. In this study, a comprehensive approach has been developed to explore the environmental consequences of P levels in receiving water with corresponding land use change in a heavily agriculturally influenced watershed. A coupled simulation using Dyna-CLUE model with grey relational analysis (GRA) and grey model GM (1,1) model was employed to stimulate spatial distribution and area demand. Besides, a comprehensive land use index with degree of P saturation (DPS%) as weight coefficient was developed to examine the statistical and spatial relationships of land use and P levels in receiving waters on regional watershed. Moreover, in order to evaluate the practical impact of land use change on water quality, a planned emigration and watershed ecological reconstruction planning were designed into the scenarios. The potential of changes in land use as an abatement action to curb eutrophication was evaluated by modelling the effect of issued emigration and ecological restoration programs in the local watershed of the Yuqiao water reservoir in northeastern China. Kappa indexes above 0.85 for the validation period verify that the coupled land use change model is able to simulate the effect of the abatement actions on land use. Scenario predictions reveals that local emigration and a comprehensive ecological restoration project as abatement actions could significantly decrease contents of P in receiving surface waters: Relative to year 2012, total P and orthophosphate could be reduced by 36 and 45 %, respectively, by the end of year 2018. This modelling approach can, with moderate modifications, also be adapted to other watersheds. The model developed in this study can thus be used by environmental managers as a tool to identify risk for P loss from diffuse sources within a watershed and assist policy makers to assess the effect on P losses by implementing abatement actions that changes land use.

• Guo, Jingheng; Wang, Fushun; Vogt, Rolf David; Zhang, Yuhang & Liu, Cong-Qaing (2015). Anthropogenically Enhanced Chemical Weathering and Carbon Evasion in the Yangtze Basin. Scientific Reports.  ISSN 2045-2322.  5(11941) . doi: 10.1038/srep11941 Full text in Research Archive.
• Lu, Changwei; He, Jiang; Zhou, Bin; Vogt, Rolf David; Guan, Rui; Wang, Weiying; Zuoa, Le & Yana, Daohao (2015). Distribution characteristics of organic phosphorus in sediments from Lake Hulun, China. Environmental Science: Processes & Impacts.  ISSN 2050-7887.  17(10), s 1851- 1858 . doi: 10.1039/c5em00326a
• Mohr, Christian Wilhelm; Vogt, Rolf David; Røyset, Oddvar; Andersen, Tom & Parekh, Neha (2015). An in-depth assessment into simultaneous monitoring of dissolved reactive phosphorus (DRP) and low-molecular-weight organic phosphorus (LMWOP) in aquatic environments using diffusive gradients in thin films (DGT). Environmental Science: Processes & Impacts.  ISSN 2050-7887.  17(4), s 711- 727 . doi: 10.1039/c4em00688g Full text in Research Archive.
• Orderud, Geir; Vogt, Rolf David; Andersen, Tom & Luo, Jing (2015). Explaining and understanding environmental actions in Chinese agriculture: the case of Yuqiao watershed of Tianjin municipality. International Journal of Sustainable Development and World Ecology.  ISSN 1350-4509.  22(6), s 496- 509 . doi: 10.1080/13504509.2015.1088484 Full text in Research Archive.
• Smebye, Andreas; Alling, Vanja Karin Gunilla; Vogt, Rolf David; Gadmar, Tone Charlotte; Mulder, Jan; Cornelissen, Gerard & Hale, Sarah (2015). Biochar amendment to soil changes dissolved organic matter content and composition. Chemosphere.  ISSN 0045-6535.  142, s 100- 105 . doi: 10.1016/j.chemosphere.2015.04.087

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• de Wit, Heleen; Braaten, Hans Fredrik Veiteberg; Gundersen, Cathrine Brecke; Krzeminski, Pawel & Vogt, Rolf David (2019). Long-term Mercury records in a boreal lake: lake Processing and the role of organic matter.
• Færgestad, Eline Mosleth & Vogt, Rolf David (2019). Biodegradability and spectroscopic properties of DNOM affected by mercury transport and uptake. Show summary

  Dissolved natural organic matter (DNOM) is a complex mixture of heterogeneous organic macromolecules that are formed in the environment, mainly by decay of plant and animal remains. All freshwaters contain a certain amount of DNOM, though in the boreal region the levels of DNOM are usually high. During the past decades, there has been a significant increase of DNOM in surface waters in the Nordic countries, Scotland and North-East America. DNOM’s ability to absorb light results in a characteristic yellow-brown colour of the water. DNOM has numerous functional groups giving the molecules specific properties, including serving as complexing agents for soft metals such as mercury. That way, DNOM increases the mercury mobility, thereby increasing the loading of the metals from soil to surface waters. On the other hand, the complexation of metals to especially high molecular weight (HMW) DNOM is expected to reduce the toxicity of the metals by making them less bioavailable. Long-term increase in DNOM may be associated with changes in the size fractions and thus biodegradability of the DNOM, which might affect bioavailability of mercury to the nutrient web. In this thesis, it was hypothesised that mercury (totHg) is mainly bound to high molecular weight DNOM, and that this fraction is less bioavailable than the low molecular weight (LMW) DNOM. It was further hypothesised that because HMW DNOM is larger and more aromatic, it has higher sUVa (Abs254/DOC) and sVISa (Abs400/DOC) values, as well as lower SAR (Abs254/Abs400) values than LMW DNOM, which may result in lower bioavailability of mercury in the HMW fractions. In order to study these hypotheses, samples from lake Langtjern were collected in the spring, late summer and fall at three different positions of the lake (outlet, inlet and hypolimnion (6 m depth)). The samples were fractionated using Tangential Flow Filtration (TFF) with a 100 kDa cut-off. Samples were fractionated into high molecular weight DNOM (>100 kDa) and low molecular weight DNOM (<100 kDa). The results from this study showed that the main bulk of DOC was found in the high molecular fraction, and that the concentration of totHg was higher in the HMW fractions than in the LMW fraction as viewed across all seasons and collection sites. The mean value of totHg in the HMW fraction was 3.3 ngL-1, and 0.93 ngL-1 in the LMW fraction. The mercury concentration in the LMW fraction decreased from the spring to the fall, whereas no change was observed in the HMW fractions. LMW fractions were smaller and less aromatic than the HMW fractions. Biodegradation experiments showed that the HMW fractions were less easily biodegradable than the LMW fractions, which may be seen in relation to the larger size and more aromatic character. There was a significant interaction between the fraction size and the season, and between the fraction size and the sample site in the mercury density of DNOM (measured as totHg/DOC). These interactions show that the extent to which mercury was bound to the different size fractions changed over the season and over the sampling sites. Differences in the mercury density of DNOM between the fractions were not observed in the spring, whereas in the late summer and fall samples the highest mercury density was found in the HMW DNOM. In the LMW fractions, the density of mercury in the DNOM decreased strongly from the spring to late summer and fall, whereas minor changes were observed for the HMW fractions. The interaction between the sampling sites and the fraction size showed that the differences in mercury density of DNOM was observed at the hypolimnion and in the outlet, but not in the inlet. These observations suggest that changes in the DNOM occur in the lake, which may lead to uptake of mercury in the nutrient chain. This would be in accordance with the observed higher biodegradation of the LMW fraction, measured as respiration rate.

• Gundersen, Cathrine Brecke; Krzeminski, Pawel; Martinez-Frances, Elena; Ong, Stevenson Harvey Lee; Færgestad, Eline Mosleth; Braaten, Hans Fredrik Veiteberg; Vogt, Rolf David & de Wit, Heleen (2019). In-Lake Processing Influences DOM Biodegradability and Hg-cycling.
• Nipen, Maja; Borgå, Katrine; Christensen, Guttorm; Haarr, Ane; Mmochi, Aviti John; Mwakalapa, Eliezer Brown; Bohlin-Nizzetto, Pernilla; Schlabach, Martin; Vogt, Rolf David & Breivik, Knut (2019). Pollution from electronic waste in the physical environment.
• Nipen, Maja; Vogt, Rolf David; Borgå, Katrine; Haarr, Ane; Mwakalapa, Eliezer Brown; Schlabach, Martin; Bohlin-Nizzetto, Pernilla; Mmochi, Aviti John & Breivik, Knut (2019). Spatial and temporal trends in e-waste related organic pollutants in a developing economy - A pilot study.
• Vogt, Rolf David (2019). Aqueous, organic or particle bound Heavy metals - Biogeochemical effect on mobility, transport, fate and effect.
• Vogt, Rolf David (2019). Biogeochemistry - The tool to understand effects of a changing environment on environmental players.
• Vogt, Rolf David (2019). Biogeokjemiske prosesser i et miljø i endring.
• Vogt, Rolf David (2019). Effects of a changing environment on environmental players - The biogeochemistry of Dissolved Natural Organic Matter (DNOM).
• Vogt, Rolf David (2019). Får vi brunere vann i fremtiden?.
• Vogt, Rolf David (2019). Karbon.
• Vogt, Rolf David (2019). Plast i havet og miljøgifter - Er det nå egentlig så nøye om vi får i oss litt mikroplast.
• de Wit, Heleen; Couture, Raoul-Marie; Futter, Martin N; Vogt, Rolf David; Krzeminski, Pawel Konrad; Francés, Elena Martínez; Ong, Stevenson Harvey Lee & Jackson-Blake, Leah Amber (2018). Climate-driven changes in removal of DOC in a small boreal lake: a 30-year time series.
• Eikebrokk, Bjørnar; Furuberg, Kjetil; Haaland, Ståle Leif; Jarvis, Peter; Riise, Gunnhild; Vogt, Rolf David & Zahlsen, Kolbjørn (2018). NOMiNOR: Natural Organic Matter in drinking waters within the Nordic Region. Norsk Vann Rapport. 231.
• Eikebrokk, Bjørnar; Furuberg, Kjetil; Haaland, Ståle Leif; Zahlsen, Kolbjørn & Vogt, Rolf David (2018). NOMiNOR: Naturlig Organisk Materiale i Nordiske drikkevann. Norsk Vann Rapport. 230.
• Gundersen, Cathrine Brecke; Vogt, Rolf David; Lundanes, Elsa; Andersen, Tom & Breedveld, Gijs D. (2018). Environmental Fate and Determination of Nitramines Formed from Amine-based CO2 Capture.
• Gundersen, Cathrine Brecke; Vogt, Rolf David; Lundanes, Elsa; Breedvelt, Gijs & Andersen, Tom (2018). Environmental Fate of Nitramines Formed During Amine Based Post-Combustion CO2 Capture.
• Haaland, Ståle Leif; Eikebrokk, Bjørnar; Riise, Gunnhild & Vogt, Rolf David (2018). Climate driven NOM development - Future browning of Western Scotland raw waters.
• Haaland, Ståle Leif; Eikebrokk, Bjørnar; Riise, Gunnhild & Vogt, Rolf David (2018). Climate driven NOM development - Future browning of Western Scotland raw waters.
• Haugnes, Gunhild M.; Tallaksen, Lena M.; Vogt, Rolf David; Storelvmo, Trude; Hessen, Dag Olav; Stordal, Frode; Lefevre, Sjannie; Kääb, Andreas & Uggerud, Einar (2018, 27. august). Klimaforskerne tar temperaturen på tropesommeren. [Tidsskrift].  Titan.uio.no.
• Hessen, Dag Olav; Stordal, Frode & Vogt, Rolf David (2018). Vi må forstå hvorfor to graders temperaturøkning er farlig. Aftenposten Viten.
• Holm, Kirsten Marie & Vogt, Rolf David (ed.) (2018). Investigation of Absorbent Material for Dissolved Natural Organic Matter and Improvement of Biodegradation Studies for Dissolved Natural Organic Matter Characterization. Full text in Research Archive.
• Holm, Kirstin Marie; Vogt, Rolf David; Håland, Alexander & Rajakumar, Janaki (2018). Biodegradability of Dissolved Natural Organic Matter.
• Mohr, Christian Wilhelm; Vogt, Rolf David; Wibetoe, Grethe & Andersen, Tom (2018). Rollen til Naturlig organisk materiale og fosfor i et miljø i endring.
• Rajakumar, Janaki; Vogt, Rolf David & Andersen, Tom (2018). Effect of Photo-Oxidation on Size, Structure and Biodegradability of Dissolved Natural Organic Matter.
• Smedsrud, Morten Skipenes; Hessen, Dag Olav & Vogt, Rolf David (2018, 30. mai). Svekket livsgrunnlag for fossekall og røye. [Fagblad].  Apollon.
• Vogt, Rolf David (2018). Biogeokjemiske prosesser i et miljø i endring.
• Vogt, Rolf David (2018). Fate and ecotoxicity of selected CCS relevant nitramines in terrestrial environment.
• Vogt, Rolf David (2018). Interdisciplinary SinoNorwegian research cooperation through 30 years.
• Vogt, Rolf David (2018). Unødvendig mye frykt og forvirring om mikroplast. Aftenposten Viten.
• Vogt, Rolf David; Haaland, Ståle Leif; Riise, Gunnhild; Bozhko, Ksenia & Eikebrokk, Bjørnar (2018). Causes for increase in Dissolved Natural Organic Matter and changes in its quality.
• Vogt, Rolf David; Holm, Kirsten Marie & Håland, Alexander (2018). WP2 - Novel DNOM characterization of Biodegradation.
• Vogt, Rolf David; Mohr, Christian Wilhelm; Rajakumar, Janaki & Gao, Pingchuan (2018). Effekter av miljøendringer på mengden løst naturlig organisk materiale, og dermed forsor, i vassdrag.
• Vogt, Rolf David & Ong, Stevenson Harvey Lee (2018). Biodegradability and Mercury Fractions in Dissolved Natural Organic Matter Size Fractions.
• Vogt, Rolf David; Rajakumar, Janaki & Mosleth, Eline Færgestad (2018). Effect of photo-oxidation on dissolved Natural matter.
• Vogt, Rolf David & Veberg, Anders (2018, 10. februar). Når fettet likevel tetter kloakkrørene – kan det brukes til kunst?.  Aftenposten.
• Vogt, Rolf David; Zhu, Liang & Nielsen, Claus Jørgen (2018). Air pollution in big cities: New challenges from Carbon Capture.
• de Wit, Heleen; Braaten, Hans Fredrik Veiteberg; Krzeminski, Pawel Konrad; Lund, Espen; Martinez-Frances, Elena; Ong, Stevenson Harvey Lee & Vogt, Rolf David (2017). The Role of DOM in Catchment and Lake Mercury Cycling in a Boreal lake catchment.
• de Wit, Heleen; Braaten, Hans Fredrik Veiteberg & Vogt, Rolf David (2017). The role of DOM in catchment and lake mercury cycling in a boreal lake catchment.
• Francés, Elena Martínez & Vogt, Rolf David (2017). Biodegradability and Spectroscopic Properties of Dissolved Natural Organic Matter Fractions Linked to Hg and MeHg Transport and Uptake.
• Kallenborn, Roland; Sydnes, Leiv K.; Vogt, Rolf David & Borgå, Katrine (2017). Kan vi få en fremtid uten forurensning fra kjemikalier?. Forskning.no : nettavis med nyheter fra norsk og internasjonal forskning.
• Martínez, Elena; Vogt, Rolf David & de Wit, Heleen (2017). Biodegradability and Spectroscopic Properties of Dissolved Natural Organic Matter Fractions Linked to Hg and MeHg Transport and Uptake.
• Mohr, Christian Wilhelm; Vogt, Rolf David; Andersen, Tom & Wibetoe, Grethe (2017). The Role of Natural Organic Matter and Phosphorus in a Changing Environment.
• Vogt, Rolf David (2017). Biogeochemistry in the Anthropocene - changes in the environmental pressures causes societal challanges.
• Vogt, Rolf David (2017). Effekter av miljøendringer på transport av fosforfraksjoner – Tiltakseffekter reduseres av miljøendringer.
• Vogt, Rolf David (2017). Nedgang i sur nedbør fører til økt vannforurensning.
• Vogt, Rolf David & Håland, Alexander (2017). Characteristics and Bioavailability of Dissolved Natural Organic Matter in a Boreal Stream during Storm Flow.
• Vogt, Rolf David; Håland, Alexander; Mohr, Christian Wilhelm & Gebreslasse, Yemane Kidanu (2017). Biodegradation.
• Vogt, Rolf David; Reiersen, Lars-Otto & Jemterud, Torkild (2017, 29. juni). Miljøgifter i Arktis. [Radio].  EKKO.
• Barton, David Nicholas; Andersen, Tom; Bergland, Olvar; Engebretsen, Alexander Melvold; Moe, S. Jannicke; Orderud, Geir; Tominaga, Koji; Romstad, Eirik & Vogt, Rolf David (2016). Eutropia: Integrated Valuation of Lake Eutrophication Abatement Decisions Using a Bayesian Belief Network, In Zachary P. Neal (ed.),  Handbook of Applied System Science.  Routledge.  ISBN 978-0-415-84332-4.  Part II: Environment and Sustainability.
• Haaland, Ståle; Eikebrokk, Bjørnar; Kitterød, Nils-Otto; Riise, Gunnhild & Vogt, Rolf David (2016). GIS in NOM modelling, with examples from a small lake in Norway. NOMiNOR project.
• Haaland, Ståle; Eikebrokk, Bjørnar; Riise, Gunnhild & Vogt, Rolf David (2016). GIS approach in forecasting NOM in lakes. NOMiNOR project.
• Haaland, Ståle; Eikebrokk, Bjørnar; Riise, Gunnhild & Vogt, Rolf David (2016). The NOMiNOR project – future natural organic matter (NOM) concentrations in Northern raw water sources.
• Lu, Xueqiang; Zhou, Bin; Vogt, Rolf David; Seip, Hans Martin; Xin, Zhiwei & Ekengren, Östen (2016). Rethinking China’s water policy: the worst water quality despite the most stringent standards. Water international.  ISSN 0250-8060.  41(7), s 1044- 1048 . doi: 10.1080/02508060.2016.1219188
• Mulder, Jan; Zhu, Jing; Dörsch, Peter; Yu, Longfei; Zhang, Xiaoshan; Wang, Zhangwei; Duan, Lei; Wang, Yanhui; Vogt, Rolf David; Larssen, Thorjørn & Stolte, Jannes (2016). N saturation, denitrification and N2O emission in subtropical forest, S. China.
• Røsjø, Bjarne & Vogt, Rolf David (2016, 23. februar). Renere nedbør gjorde innsjøen mer forurenset. [Internett].  Titan.uio.no.
• Røsjø, Bjarne & Vogt, Rolf David (2016, 10. februar). Sur nedbør beskyttet mot giftig kvikksølv. [Internett].  Titan.uio.no.
• Røsjø, Bjarne; Vogt, Rolf David & Seip, Hans Martin (2016, 19. februar). Kineserne er fortsatt sinte over nobelprisen. [Internett].  titan.uio.no.
• Røsjø, Bjarne; Vogt, Rolf David & Seip, Hans Martin (2016, 22. januar). Kinesiske miljøforskere beskylder Norge for dobbeltmoral. [Internett].  Titan.uio.no.
• Shafia, Iftekhar & Vogt, Rolf David (2016). Factors explaining the effect of photo-oxidation of DNOM.
• Vogt, Rolf David (2016). Andre Forurensninger, I: Norges Forskningsråd (red.),  Synteserapport Norsk miljøforskning mot 2015.  Norges Forskningsråd.  Andre Forurensninger.  s 58 - 60
• Vogt, Rolf David (2016). Drivers of DNOM spatial and temporal variation.
• Vogt, Rolf David (2016). Seksjon for Miljøvitenskap.
• Vogt, Rolf David (2016). The role of DNOM in governing methyl-Hg levels.
• Vogt, Rolf David; Gao, Pingchuan; Hessen, Dag Olav & Haaland, Ståle (2016). Effect of solar radiation on Dissolved Natural Organic Matter. Show summary

  Lakes and rivers are the main sources of drinking water in Nordic countries. For aesthetic and hygienic reasons high concentration levels of dissolved natural organic matter (DNOM) are not acceptable in drinking water. An increasing amount of DNOM in raw water sources for drinking water in Fennoscandia is thus raising our concerns. Moreover, the DNOM constitute an important transport mechanism for the flux of allochthonous nutrients to surface water. Once in the lake the DNOM photo-degrades due to adsorption of energy from sunlight. This causes its larger molecular weight (MW) compound to decompose into a variety of smaller organic photoproducts. Moreover, some of the DNOM is mineralized completely to inorganic compounds. Mineralization of DNOM causes a release of aluminum (Al) and iron (Fe) ions along with the release of orthophosphate (PO43-). The metal ions rapidly hydrolyze and form oxy-hydroxides which co-sorb phosphate and precipitate. Due to the removal of mineralized PO43- by subsequent precipitation with Fe- and Al-oxy hydroxides it is difficult to detect how much orthophosphate becomes mineralized by solar radiation. This is needed in order to assess the amount of this limiting nutrient becoming available for autotrophs. Thus the essence of this study is to test the option of using algae growth response as an indication of phosphorus release. Considerable research has been conducted comparing the changes in characteristics of the matrix that DNOM is in and structural characterization of DNOM, before and after solar exposure. A continuous increase in the relative contribution of lower to higher MW DNOM compounds along with a decrease in DOC concentration has been found with the extension of exposure time. This implies that the photochemical mineralization of DNOM by the photo-oxidation transforms the higher MW DNOM compounds into lower MW compounds, and that some of the DNOM is completely mineralized. This is further corroborated with fluorescence spectroscopy, indicating a decreased ratio of Humic to Fulvic acids in the DNOM as a response to sunlight exposure. This would imply that when sunlight is absorbed by DNOM, the average molecular weight is reduced. Results from assays showing increased algal growth imply that PO43- has been mineralized from DNOM due to photochemical reaction. On the other hand the growth response is not always significant. This may partly be due to concurrent heterotopic mineralization by bacteria.

• Vogt, Rolf David; Haaland, Ståle & Riise, Gunnhild (2016). Unravelling factors explaining trends in DOM.
• Vogt, Rolf David & Selstø, Ragnhild Sofie (2016, 12. oktober). Stenges ute av kinesiske mur.  Universitas.
• Zhou, Bin; Vogt, Rolf David; Lu, Xueqiang & Xu, Chong-Yu (2016). Assessments through field studies, experiments and modelling of potential risk for phosphorus loss from an agricultural watershed.
• Zhou, Bin; Vogt, Rolf David; Xu, Chong-Yu & Lu, Xueqiang (2016). Assessments through field studies, experiments and modelling of potential risk for phosphorus loss from an agricultural watershed.
• Foseid, Lena; Vogt, Rolf David; Nielsen, Claus Jørgen; Lundanes, Elsa & Gundersen, Cathrine Brecke (2015). Determination of MEA-nitramine in Soil Water and Assessing the Sorption Potential of MEAnitramine to Soil. Show summary

  Small amounts of amines are emitted with the flue gas from amine based carbon capture plants. The amines atmospheric degradation have been studied in detail. The environmental impact of the degradation products, e.g. the possibly carcinogenic and mutagenic nitramines, is however insufficiently studied. This thesis investigates the capacity of nitramines to sorb to soil, depending on the soils physiochemical characteristics. To accomplish this, the analytical challenges with regards to determination of nitramines in soil water had to be solved. Soil samples were collected in the vicinity of Technology Center Mongstad (TCM) (~15 km) as this is a possible future deposition site for nitramines. The sampling sites were chosen with the aim of collecting soils with different physiochemical properties, with special emphasis on the content of soil organic matter and soil texture. All of the collected soil samples (n=16) were analysed for explanatory parameters expected to influence soil sorption, such as organic matter (OM) content, dissolved natural organic matter (DNOM) leached from the soil, texture, mineralogy, pH and conductivity. A selection of the samples (n=5) were used in soil sorption experiments to assess the sorption potential of N-Nitroethanolamine (MEA-nitramine). A batch experimental set-up was used, and sorption was measured as loss of MEA-nitramine from the aqueous phase after being added at known concentrations (24 h equilibrium). For these samples, elemental composition was also determined. Possible correlations between the sorption coefficients and the soils physiochemical characteristics were assessed. Determination of MEA-nitramine in soil water with LC-MS/MS proved to be a challenge due to matrix effects. Different calibration methods with and without matrix matched calibration solutions were tested. Another nitramine, N-nitromethylamine (MMA-nitramine), was tested as internal standard. Additionally, a couple of sample pretreatment techniques were tested to try and separate the analyte from the matrix (solid phase extraction (SPE), filtration). Sorption partitioning coefficients between soil and aqueous phase were determined (Kd) and the results imply that a significant amount of MEA-nitramine will remain in the aqueous phase. Correlation between the partition coefficients for the five studied soils and the soils OM content was observed (r > 0.788). Loss of internal standard (MMA-nitramine) was also observed, this loss correlated strongly with the DNOM concentration in the sample supernatant (r = 0.9924), implying that sorption to DNOM could be important. The relation between sorption and OM content implies that sorption will generally be higher in the top soil (organic) horizons than in the lower (mineral) soil horizons. As deposition of atmospherically formed nitramines will be to the soil surface, this can serve to hinder mobility. The analytical determination method for nitramines in soil water was improved, although not considered satisfactory at the end of the study. Major improvement resulted from the used of matrix matched calibration curves, which compensate for both ion suppression/enhancement effects and possible sorption to DNOM. Even though this is time- and labour consuming, the method was proven more successful than attempts made to separate the analyte from the matrix prior to analysis. The used of MMA-nitramine as an internal standard for determination of MEA-nitramine was not successful, possibly due to the difference in retention time and therefore possible different effect from the matrix components. An isotope-labelled internal standard should therefore be acquired. Investigation into other sample pretreatments could also be of interest. Note that previously reported sorption partition coefficients for sorption of nitramines to soil could be inaccurate if matrix matched calibration curves were not employed.

• Braaten, Hans Fredrik Veiteberg; Larssen, Thorjørn & Vogt, Rolf David (2015). Mercury in boreal freshwater fish – factors and processes governing increasing concentrations.
• Gundersen, Cathrine Brecke; Foseid, Lena; Zhu, Liang; Lundanes, Elsa & Vogt, Rolf David (2015). Sorption potential of Nitramines to soils - Methodical challenges using LC-MS/MS.
• Haaland, Ståle Leif; Eikebrokk, Bjørnar; Kitterød, Nils-Otto; Riise, Gunnhild & Vogt, Rolf David (2015). NOM catchment modeling.
• Kapusta, Pawel; Szarek-Lukaszewska, Grazyna & Vogt, Rolf David (2015). Physiochemical and biological Properties of soil in the prevailing types of plant communities in the Olkusz mining region, In Barbara Godzik (ed.),  Natural and historical values of the Olkusz Ore-bearing Region.  W. Szafer Institute of Botany, Polish Academy of Sciences.  ISBN 978-83-62975-25-9.  13.  s 269 - 292
• Mohr, Christian Wilhelm; Ojwando, Wycliffe Omondi; Vogt, Rolf David; Andersen, Tom & Røyset, Oddvar (2015). Passive Sampling of Dissolved Reactive Phosphorus (DRP) & Low-Molecular-Weight Organic Phosphorus (LMWOP) by Diffusive Gradients in Thin Films.
• Mohr, Christian Wilhelm & Vogt, Rolf David (2015). Solution to acid rain pollution and the onset of eutrophication: A geochemical modelling explanation.
• Mohr, Christian Wilhelm; Vogt, Rolf David; Røyset, Oddvar; Andersen, Tom & Parekh, Neha (2015). An in-depth assessment into simultaneous monitoring of dissolved reactive phosphorus (DRP) and low-molecular-weight organic phosphorus (LMWOP) in aquatic environments using DGTs.
• Rosales, Said Yemille Ortega & Vogt, Rolf David (2015). Effect of Size Distribution and Fe (Iron) Fractionation of Natural Organic Matter on Fluorescence and UV/VIS Spectroscopy.

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