Probability Maps for the Visualization of Assimilation Ensemble Flow Data

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dc.contributor.authorHöllt, Thomasen_US
dc.contributor.authorHadwiger, Markusen_US
dc.contributor.authorKnio, Omaren_US
dc.contributor.authorHoteit, Ibrahimen_US
dc.contributor.editorA. Middel and K. Rink and G. H. Weberen_US
dc.date.accessioned2015-05-24T19:38:25Z
dc.date.available2015-05-24T19:38:25Z
dc.date.issued2015en_US
dc.description.abstractOcean forecasts nowadays are created by running ensemble simulations in combination with data assimilation techniques. Most of these techniques resample the ensemble members after each assimilation cycle. This means that in a time series, after resampling, every member can follow up on any of the members before resampling. Tracking behavior over time, such as all possible paths of a particle in an ensemble vector field, becomes very difficult, as the number of combinations rises exponentially with the number of assimilation cycles. In general a single possible path is not of interest but only the probabilities that any point in space might be reached by a particle at some point in time. In this work we present an approach using probability-weighted piecewise particle trajectories to allow such a mapping interactively, instead of tracing quadrillions of individual particles. We achieve interactive rates by binning the domain and splitting up the tracing process into the individual assimilation cycles, so that particles that fall into the same bin after a cycle can be treated as a single particle with a larger probability as input for the next time step. As a result we loose the possibility to track individual particles, but can create probability maps for any desired seed at interactive rates.en_US
dc.description.sectionheadersConcepts for Workflows and Visualisationen_US
dc.description.seriesinformationWorkshop on Visualisation in Environmental Sciences (EnvirVis)en_US
dc.identifier.doi10.2312/envirvis.20151090en_US
dc.identifier.pages43-47en_US
dc.identifier.urihttps://doi.org/10.2312/envirvis.20151090en_US
dc.publisherThe Eurographics Associationen_US
dc.subjectI.3.3 [Computer Graphics]en_US
dc.subjectPicture/Image Generation—Line and curve generationen_US
dc.titleProbability Maps for the Visualization of Assimilation Ensemble Flow Dataen_US
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