The added value of participatory modelling in fisheries management – what has been learnt?     

Christine Röckmann  Clara Ulrich  Marion Dreyer  Ewen Bell  Edward Borodzicz  Päivi Haapasaari  Kjellrun Hiis Hauge  Daniel Howell  Samu Mäntyniemi  David Miller  George Tserpes  Martin Pastoors 《Marine Policy》2012

How can uncertain fisheries science be linked with good governance processes, thereby increasing fisheries management legitimacy and effectiveness? Reducing the uncertainties around scientific models has long been perceived as the cure of the fisheries management problem. There is however increasing recognition that uncertainty in the numbers will remain. A lack of transparency with respect to these uncertainties can damage the credibility of science. The EU Commission's proposal for a reformed Common Fisheries Policy calls for more self-management for the fishing industry by increasing fishers' involvement in the planning and execution of policies and boosting the role of fishers' organisations. One way of higher transparency and improved participation is to include stakeholders in the modelling process itself. The JAKFISH project (Judgment And Knowledge in Fisheries Involving StakeHolders) invited fisheries stakeholders to participate in the process of framing the management problem, and to give input and evaluate the scientific models that are used to provide fisheries management advice. JAKFISH investigated various tools to assess and communicate uncertainty around fish stock assessments and fisheries management. Here, a synthesis is presented of the participatory work carried out in four European fishery case studies (Western Baltic herring, North Sea Nephrops, Central Baltic Herring and Mediterranean swordfish), focussing on the uncertainty tools used, the stakeholders' responses to these, and the lessons learnt. It is concluded that participatory modelling has the potential to facilitate and structure discussions between scientists and stakeholders about uncertainties and the quality of the knowledge base. It can also contribute to collective learning, increase legitimacy, and advance scientific understanding. However, when approaching real-life situations, modelling should not be seen as the priority objective. Rather, the crucial step in a science–stakeholder collaboration is the joint problem framing in an open, transparent way.  相似文献   

On fast pulsations in flare continua     

Ø. Elgarøy 《Solar physics》1986,104(1):43-49

Pulsations with periods down to 0.05 s have been observed in continuum emission following flares. In pulsating events several frequencies may be excited, simultaneously or in time succession. Pulsations occur both in classical type IV events and in short-lasting continuum events. The power spectrum shows no large variation during one or two hours. Some implications of fast pulsations for the generation mechanism are discussed.Proceedings of the Workshop on Radio Continua during Solar Flares, held at Duino (Trieste), Italy, 27–31 May, 1985.  相似文献   

Information Gathering in Bayesian Networks Applied to Petroleum Prospecting     

Marie Lilleborge  Ragnar Hauge  Jo Eidsvik 《Mathematical Geosciences》2016,48(3):233-257

  相似文献   

Stratigraphical distribution of platinum-group minerals in the Eastern Layered Series, Rum, Scotland     

M. R. Power  D. Pirrie  J. C. Ø. Andersen  A. R. Butcher 《Mineralium Deposita》2000,35(8):762-775

Abundant and diverse platinum-group minerals (PGM) occur throughout the Tertiary layered intrusion on Rum, Scotland. In this paper we document the distribution of PGM within the Eastern Layered Series (ELS) on Rum, which comprises 16 alternating units of olivine-dominant feldspathic peridotite grading to plagioclase-dominant allivalite. The PGM occur in six main chrome-spinel layers in the Eastern Layered Series and are clearly associated with minor concentrations of interstitial sulphides. Common PGM phases include: Pd–Cu alloys, Pt–Fe alloys, native Pt, laurite, moncheite, sperrylite, isomertiete, cooperite and braggite along with a large number of other less common arsenide, bismuthotelluride and sulphide phases. Analyses of the discrete chromitite layers yield up to ΣPGE + Au 2618 ppb. Although present throughout the 750-m-thick ELS, there are clear stratigraphical changes in the PGM assemblage. The presence of PGM in the ELS on Rum are interpreted as being caused by mantle melting associated with the proto-Icelandic `hot spot', followed by localised concentration because of the combined effects of magma mixing, sulphide-silicate liquid immiscibility and fractional crystallisation. Most of the PGM are magmatic in origin but some grains show evidence of hydrothermal alteration. Received: 27 November 1999 / Accepted: 27 April 2000  相似文献   

Well Conditioning in a Fluvial Reservoir Model   总被引：3，自引：0，他引：3  

A. Skorstad  R. Hauge  L. Holden 《Mathematical Geology》1999,31(7):857-872

This paper describes a method for conditioning an object model of a fluvial reservoir on facies observations. The channels are assumed parametrized at sections normal to their main channel direction. Projections of the observations on these sections generates a map suitable for drawing conditioning values. This map contains the information from every facies observation between two adjacent sections, enabling handling of any well path. Coupling between well observations is also discussed. The methodology is implemented and demonstrated in examples with complex wells.  相似文献