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(fraction of total area covered by sea ice) between 0% and 100% can be created.


Demonstration ice field generated by the IceStream algorithm; the three colours indicate three different ice types present in the field, as is given by the “egg-code”.


identified by the JIP considers the prediction of the flow of ice around floating structures. The objective of IceStream was to obtain a description of the ice conditions geometry, similar to sea state definitions for open water conditions. Ice field characteristics are described by a number of parameters that are captured in the so-called ‘egg-code’. This code is generally used in navigation charts for determining routing. But it was found that it could also serve as a basis for the creation of input for numerical models for floating structures in ice.


An algorithm was developed that is able to translate the egg-code parameters to a corresponding ice field visualisation. The ice field, represented by a set of ice particles, can be inserted in numerical simulations. A ‘Voronoi Treemapping’ principle is the basis of the visualisation process, which has the advantage that any ice concentration


IceStream JIP Based on the outcome of the IceStream pilot project, there was sufficient support from the JIP participants to initiate a proposal for a follow-up project, the Ice- Stream JIP. In aNySIM a floating structure will be modelled, along with the generated set of ice particles. This case will also be simulated by partner Oceanic in its numeri- cal model DECICE. Additionally, model tests will be carried out in the NRC ice tank, as well as with artificial ice at MARIN. Contact: Solange van der Werff, s.v.d.werff@marin.nl


SALTO JIP At the beginning of this year, the Safe Arctic Logistics, Transport and Operations (SALTO) JIP was launched (see pages 4/5). This project will contribute to the optimisation of transport and offshore operations in Arctic regions. To achieve this, a design tool will be developed that is based on probabilistic operations simulations and risk evaluation. Contact: Albert Aalbers, a.aalbers@marin.nl


IceTower JIP The IceTower JIP initiative involves the instrumentation of an offload- ing tower encountering severe ice flows. During three winter seasons, the loads on the tower and the ice conditions will be monitored. This JIP is under preparation with a kick-off scheduled in September 2014. Contact: Henk van den Boom, h.v.d.boom@marin.nl


PractICE JIP The PractICE JIP aims to provide a real- time simulation platform


Closure meeting of the Arctic Operations Handbook JIP, with the delivered Guide frozen in a piece of ice.


enabling practical simulations of offshore operations in ice. It will build on previous conceptual studies, initial model work and will comply with training objectives and requirements set by the industry. This JIP is under preparation with the kick-off expected at the beginning of 2015. Contact: Auke Ditzel, a.ditzel@marin.nl


report


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