Finite-Element Sea Ice Model (FESIM), version 2

Danilov, Sergey; Wang, Qiang; Timmermann, Ralph; Iakovlev, Nikolay; Sidorenko, Dmitry; Kimmritz, Madlen; Jung, Thomas; Schröter, Jens

doi:10.5194/gmdd-8-855-2015

Cited by 12 publications

(15 citation statements)

References 25 publications

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“…A brief description of the model configuration is given below. Details of the model's ocean and sea ice components are described by Wang et al () and Danilov et al (), respectively.…”

Section: Model Setup and Methodsmentioning

confidence: 99%

Mechanisms Driving the Interannual Variability of the Bering Strait Throughflow

Zhang

Wang

et al. 2020

JGR Oceans

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The Bering Strait throughflow has important implications for the Arctic freshwater, heat, and nutrients. By keeping the interannual variabilities of the atmospheric forcing only inside or outside the Arctic Ocean in numerical simulations, we can quantify their relative contributions to the interannual variability of the throughflow. We found that winds play a much more important role for the throughflow interannual variability than buoyancy forcing. Winds over the western Arctic Ocean and North Pacific determine the direction of Ekman transport, thus changing the sea surface height gradient between the two basins, and consequently influencing the volume transport strength. Although winds over the two basins are similarly important for the variance of ocean volume transport, the North Pacific winds cause stronger variability in freshwater and heat transports through modifying the inflow temperature and salinity. After 1994, winds over the western Arctic Ocean explain a larger part of the variability of Bering Strait volume transport than the winds outside the Arctic Ocean.

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“…A brief description of the model configuration is given below. Details of the model's ocean and sea ice components are described by Wang et al () and Danilov et al (), respectively.…”

Section: Model Setup and Methodsmentioning

confidence: 99%

Mechanisms Driving the Interannual Variability of the Bering Strait Throughflow

Zhang

Wang

et al. 2020

JGR Oceans

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“…In this study, the global multiresolution Finite‐Element‐Sea ice‐Ocean Model (FESOM) is used, which solves the standard set of hydrostatic primitive equations in the Boussinesq approximation and is discretized with the finite element method (Danilov et al, ; Wang et al, ). It employs unstructured triangular meshes in the horizontal and tetrahedral elements in the volume.…”

Section: Methodsmentioning

confidence: 99%

Eddy‐Resolving Simulation of the Atlantic Water Circulation in the Fram Strait With Focus on the Seasonal Cycle

et al. 2017

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Eddy driven recirculation of Atlantic Water (AW) in the Fram Strait modifies the amount of heat that reaches the Arctic Ocean, but is difficult to constrain in ocean models due to very small Rossby radius there. In this study, we explore the effect of resolved eddies on the AW circulation in a locally eddy‐resolving simulation of the global Finite‐Element‐Sea ice‐Ocean Model (FESOM) integrated for the years 2000–2009, by focusing on the seasonal cycle. An eddy‐permitting simulation serves as a control run. Our results suggest that resolving local eddy dynamics is critical to realistically simulate ocean dynamics in the Fram Strait. Strong eddy activity simulated by the eddy‐resolving model, with peak in winter and lower values in summer, is comparable in magnitude and seasonal cycle to observations from a long‐term mooring array, whereas the eddy‐permitting simulation underestimates the observed magnitude. Furthermore, a strong cold bias in the central Fram Strait present in the eddy‐permitting simulation is reduced due to resolved eddy dynamics, and AW transport into the Arctic Ocean is increased with possible implications for the Arctic Ocean heat budget. Given the good agreement between the eddy‐resolving model and measurements, it can help filling gaps that point‐wise observations inevitably leave. For example, the path of the West Spitsbergen Current offshore branch, measured in the winter months by the mooring array, is shown to continue cyclonically around the Molloy Deep in the model, representing the major AW recirculation branch in this season.

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“…The global multiresolution sea ice‐ocean model FESOM used in this study employs unstructured triangular meshes in the horizontal and tetrahedral elements in the volume. The ocean model [ Wang et al ., ] is coupled to a dynamic‐thermodynamic sea ice model [ Timmermann et al ., ; Danilov et al ., ], which is based on the thermodynamics of Parkinson and Washington [] and dynamics of Hunke and Dukowicz [].…”

Section: Methodsmentioning

confidence: 99%

“…This study attempts to answer some of the above questions through simulations performed with the global multiresolution Finite Element Sea ice Ocean Model (FESOM) [ Wang et al ., ; Danilov et al ., ]. We use the FESOM ability to smoothly refine the resolution in the area of interest, in this case in the Arctic Ocean and in the Nordic Seas.…”

Section: Introductionmentioning

confidence: 99%

Atlantic Water in the Nordic Seas: Locally eddy-permitting ocean simulation in a global setup

Wekerle

Wang

Danilov

et al. 2017

J. Geophys. Res. Oceans

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Warm and salty Atlantic Water is transported by the Norwegian Atlantic Current through the Nordic Seas. A fraction of it enters the Arctic Ocean where it contributes significantly to its heat budget. Resolving the complex circulation structure in the Nordic Seas, in particular eddies, presents a numerical challenge in ocean models. Here, we present a hindcast experiment for the years 1969–2009 with a global configuration of the Finite Element Sea‐ice Ocean Model, employing a high‐resolution mesh in the Nordic Seas and Arctic Ocean (4.5 km). We show that substantial improvements can be achieved in the circulation structure, hydrography and eddy kinetic energy in the Nordic Seas compared with a coarse‐resolution reference run. A better represented Norwegian Atlantic Front Current (NwAFC) in the high‐resolution setup leads to a reduction of a strong negative temperature bias in the eastern Nordic Seas. The Atlantic Water inflow through the Iceland‐Faroe Ridge is found to be very sensitive to mesh resolution, and high resolution is required to adequately represent this inflow and the downstream NwAFC. With increased mesh resolution, the simulated ocean temperature is significantly improved at Barents Sea Opening (BSO), and the Atlantic Water volume transport in Fram Strait becomes much closer to observations in terms of both magnitude and variability. By using passive tracers, the origins of water masses at BSO and Fram Strait are identified. Our study also indicates that eddy‐resolving meshes are required to further improve the representation of dynamical processes in the region, in particular in Fram Strait.

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Finite-Element Sea Ice Model (FESIM), version 2

Cited by 12 publications

References 25 publications

Mechanisms Driving the Interannual Variability of the Bering Strait Throughflow

Mechanisms Driving the Interannual Variability of the Bering Strait Throughflow

Eddy‐Resolving Simulation of the Atlantic Water Circulation in the Fram Strait With Focus on the Seasonal Cycle

Atlantic Water in the Nordic Seas: Locally eddy-permitting ocean simulation in a global setup

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