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Browsing by Author "Ragnarsdottir, Kristin Vala"

Browsing by Author "Ragnarsdottir, Kristin Vala"

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    From waste to resource: A systems dynamics and stakeholder analysis of phosphorus recycling from municipal wastewater in Europe 
    Nedelciu, Claudiu; Ragnarsdottir, Kristin Vala; Stjernquist, Ingrid (Springer Science and Business Media LLC, 2018-09-14)
    Recycling Phosphorus (P) from urban wastewater can secure part of domestic agricultural P supply and contribute to a circular P supply chain. In this paper, we use literature review, stakeholder interviews and analysis, and systems dynamics for the ...
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    Global phosphorus supply chain dynamics: Assessing regional impact to 2050 
    Nedelciu, Claudiu; Ragnarsdottir, Kristin Vala; Schlyter, Peter; Stjernquist, Ingrid (Elsevier BV, 2020-09)
    Phosphorus (P) availability is essential for global food security. A system dynamics model running from 1961 to 2050 was built for this study, linking global P supply to social, economic and environmental dynamics at regional level. Simulation results ...
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    On the long-term sustainability of copper, zinc and lead supply, using a system dynamics model 
    Sverdrup, Harald Ulrik; Olafsdottir, Anna; Ragnarsdottir, Kristin Vala (Elsevier BV, 2019-12)
    The long-term supply sustainability of copper, zinc and lead was assessed. Copper will not run into physcal scarcity in the future, but increased demand and decreased resource quality will cause significant price increases. The copper price is suggested ...
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    Opening access to the black box: The need for reporting on the global phosphorus supply chain 
    Nedelciu, Claudiu; Ragnarsdottir, Kristin Vala; Stjernquist, Ingrid; Schellens, Marie Katharine (Springer Science and Business Media LLC, 2019-09-04)
    Phosphorus (P) is an essential macronutrient in agriculture; however, lack of reporting makes its supply chain a black box. By using literature synthesis on the P challenge, we identify four areas where the reporting process is problematic: P reserves ...
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    Transparency and Leverage Points for Sustainable Resource Management 
    Gisladottir, Johanna; Sigurgeirsdottir, Sigurbjörg; Stjernquist, Ingrid; Ragnarsdottir, Kristin Vala (2022-12-14)
    The phrase ‘sunshine is the best disinfectant’ is commonly used to suggest that transparency can counter corruption and ensure accountability. In the policy world, several analytical tools have been developed to obtain information on what policy decision ...