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Academic literature on the topic 'NORWECOM'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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Journal articles on the topic "NORWECOM"

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Simon, E., and L. Bertino. "Application of the Gaussian anamorphosis to assimilation in a 3-D coupled physical-ecosystem model of the North Atlantic with the EnKF: a twin experiment." Ocean Science Discussions 6, no. 1 (2009): 617–52. http://dx.doi.org/10.5194/osd-6-617-2009.

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Abstract. We consider the application of the Ensemble Kalman Filter (EnKF) to a coupled ocean ecosystem model (HYCOM-NORWECOM). Such models, especially the ecosystem models, are characterized by strongly non-linear interactions active in ocean blooms and present important limitations for the use of data assimilation methods based on linear statistical analysis. Besides the non-linearity of the model, one is confronted with physical/biological limitations, the analysis state having to be consistent with the model, especially with the constraints of positiveness of some variables. Furthermore th

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2

Samuelsen, A., C. Hansen, and H. Wehde. "Tuning and assessment of the HYCOM-NORWECOM V2.1 modeling system." Geoscientific Model Development Discussions 7, no. 6 (2014): 8399–432. http://dx.doi.org/10.5194/gmdd-7-8399-2014.

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Abstract. The HYCOM-NORWECOM modeling system is used both for basic research and as a part of the forecasting system for the Arctic Marine Forecasting Centre through the MyOcean project. Here we present a revised version of this model. The present model, as well as the sensitivity simulations leading up to this version, has been compared to a dataset of in-situ measurements of nutrient and chlorophyll from the Norwegian Sea and the Atlantic sector of the Arctic Ocean. The revisions having most impact included adding diatoms to the diet of micro-zooplankton, increasing micro-zooplankton grazing

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Simon, E., and L. Bertino. "Application of the Gaussian anamorphosis to assimilation in a 3-D coupled physical-ecosystem model of the North Atlantic with the EnKF: a twin experiment." Ocean Science 5, no. 4 (2009): 495–510. http://dx.doi.org/10.5194/os-5-495-2009.

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Abstract. We consider the application of the Ensemble Kalman Filter (EnKF) to a coupled ocean ecosystem model (HYCOM-NORWECOM). Such models, especially the ecosystem models, are characterized by strongly non-linear interactions active in ocean blooms and present important difficulties for the use of data assimilation methods based on linear statistical analysis. Besides the non-linearity of the model, one is confronted with the model constraints, the analysis state having to be consistent with the model, especially with respect to the constraints that some of the variables have to be positive.

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Samuelsen, A., L. Bertino, and C. Hansen. "Impact of data assimilation of physical variables on the spring bloom from TOPAZ operational runs in the North Atlantic." Ocean Science 5, no. 4 (2009): 635–47. http://dx.doi.org/10.5194/os-5-635-2009.

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Abstract. A reanalysis of the North Atlantic spring bloom in 2007 was produced using the real-time analysis from the TOPAZ North Atlantic and Arctic forecasting system. The TOPAZ system uses a hybrid coordinate general circulation ocean model and assimilates physical observations: sea surface anomalies, sea surface temperatures, and sea-ice concentrations using the Ensemble Kalman Filter. This ocean model was coupled to an ecosystem model, NORWECOM (Norwegian Ecological Model System), and the TOPAZ-NORWECOM coupled model was run throughout the spring and summer of 2007. The ecosystem model was

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Samuelsen, A., L. Bertino, and C. Hansen. "The 2007 North Atlantic spring bloom in operational analysis from the TOPAZ system." Ocean Science Discussions 6, no. 1 (2009): 343–69. http://dx.doi.org/10.5194/osd-6-343-2009.

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Abstract. A reanalysis of the North Atlantic spring bloom in 2007 was produced using the real-time analyses from the TOPAZ (Towards an Operational Prediction system for the North Atlantic European coastal Zones) North Atlantic and Arctic forecasting system. The TOPAZ system uses a hybrid coordinate general circulation ocean model and assimilates physical observations: sea surface anomalies, sea surface temperatures, and sea-ice concentrations using the Ensemble Kalman Filter. This ocean model was coupled to an ecosystem model, NORWECOM (Norwegian Ecological Model System), and the TOPAZ-NORWECO

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Simon, E., A. Samuelsen, L. Bertino, and D. Dumont. "Estimation of positive sum-to-one constrained zooplankton grazing preferences with the DEnKF: a twin experiment." Ocean Science 8, no. 4 (2012): 587–602. http://dx.doi.org/10.5194/os-8-587-2012.

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Abstract. We consider the estimation of the grazing preferences parameters of zooplankton in ocean ecosystem models with ensemble-based Kalman filters. These parameters are introduced to model the relative diet composition of zooplankton that consists of phytoplankton, small size-classes of zooplankton and detritus. They are positive values and their sum is equal to one. However, the sum-to-one constraint cannot be guaranteed by ensemble-based Kalman filters when parameters are bounded. Therefore, a reformulation of the parameterization is proposed. We investigate two types of variable transfo

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7

Simon, E., A. Samuelsen, L. Bertino, and D. Dumont. "Estimation of positive sum-to-one constrained zooplankton grazing preferences with the DEnKF: a twin experiment." Ocean Science Discussions 9, no. 2 (2012): 1085–121. http://dx.doi.org/10.5194/osd-9-1085-2012.

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Abstract. We consider the estimation of the grazing preferences parameters of zooplankton in ocean ecosystem models with ensemble-based Kalman filters. These parameters are introduced to model the relative diet composition of zooplankton that consists of phytoplankton, small size-classes of zooplankton and detritus. They are positive values and their sum is equal to one. However, the sum-to-one constraint cannot be guaranteed by ensemble-based Kalman filters when parameters are bounded. Therefore, a reformulation of the parameterization is proposed. We investigate two types of variables transf

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8

Samuelsen, A., C. Hansen, and H. Wehde. "Tuning and assessment of the HYCOM-NORWECOM V2.1 biogeochemical modeling system for the North Atlantic and Arctic oceans." Geoscientific Model Development 8, no. 7 (2015): 2187–202. http://dx.doi.org/10.5194/gmd-8-2187-2015.

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Abstract. The HYCOM-NORWECOM (HYbrid Coordinate Ocean Model–NORWegian ECOlogical Model) modeling system is used both for basic research and as a part of the forecasting system for the Arctic Marine Forecasting Centre through the MyOcean project. Here we present a revised version of this model. The present model, as well as the sensitivity simulations leading up to this version, have been compared to a data set of in situ measurements of nutrient and chlorophyll from the Norwegian Sea and the Atlantic sector of the Arctic Ocean. The model revisions having the most impact included adding diatoms

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9

Hjøllo, Solfrid Sætre, Geir Huse, Morten D. Skogen, and Webjørn Melle. "Modelling secondary production in the Norwegian Sea with a fully coupled physical/primary production/individual-based Calanus finmarchicus model system." Marine Biology Research 8, no. 5-6 (2012): 508–26. https://doi.org/10.1080/17451000.2011.642805.

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The copepod Calanus finmarchicus is the dominant species of the meso-zooplankton in the Norwegian Sea, and constitutes an important link between the phytoplankton and the higher trophic levels in the Norwegian Sea food chain. An individual-based model for C. finmarchicus, based on super-individuals and evolving traits for behaviour, stages, etc., is two-way coupled to the NORWegian ECOlogical Model system (NORWECOM). One year of modelled C. finmarchicus spatial distribution, production and biomass are found to represent observations reasonably well. High C. finmarchicus abundance is found alon

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Book chapters on the topic "NORWECOM"

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Jones, Gwyneth. "Interviews." In Joanna Russ. University of Illinois Press, 2019. http://dx.doi.org/10.5622/illinois/9780252042638.003.0009.

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Interview conducted by email in 2017–18 GWYNETH JONES: You met Joanna Russ when you were at the University of Washington, and she became your self-chosen mentor—for a while. Could you tell me how that came about? KATHRYN CRAMER: When I was in high school, my father got back in contact with Gene Wolfe, whom he had known as a child. Gene came to Seattle to attend Norwescon and suggested that we come out. That was my first sf convention. I’m not sure if it was at that Norwescon or one a few years later, but I saw Joanna Russ speak on panels and found out she was on the University of Washington fa

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Conference papers on the topic "NORWECOM"

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Speight, Nicholas. "SOIL MAGNETISM AS A FUNCTION OF SLOPE, NORWESCOR HOLSTEIN FARMS IN STARK CO., OHIO." In Joint 56th Annual North-Central/ 71st Annual Southeastern Section Meeting - 2022. Geological Society of America, 2022. http://dx.doi.org/10.1130/abs/2022nc-374644.

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