Downscaling a twentieth century global climate simulation to the North Sea

Ådlandsvik, Bjørn; Bentsen, Mats

doi:10.1007/s10236-007-0125-2

Cited by 30 publications

(17 citation statements)

References 22 publications

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“…In general, coarse resolution global models cannot capture the current along the Norwegian Trench very accurately, because the horizontal resolution is usually not sufficient to represent the related dynamics. In our downscaling experiments, the ESC and NCC both decrease by Â10%, in contrast to the conclusion of Å dlandsvik and Bentsen (2007). This is probably caused by the fact that the northern boundary in our model is further south than in Å dlandsvik and Bentsen (2007), and it is shown that nesting experiments with different locations of open boundaries could produce different results.…”

Section: Circulation Differences Between Both Modelscontrasting

confidence: 77%

“…This method leads to discussion about the choice of open boundary conditions (Palma and Matano, 1998;Marchesiello et al, 2001;Chen et al, 2013). Å dlandsvik and Bentsen (2007) performed the marine downscaling of global simulations to the North Sea from a coupled climate model (20C3M experiment). They reported that the added value of downscaling is to provide the regional details, doubling the *Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of a zoomed global model for the North Sea by comparison with a conventional nested regional model

Su¹,

Sein²,

Mathis³

et al. 2014

Tellus A: Dynamic Meteorology and Oceanography

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On long timescales, the North Atlantic Current (NAC) inflow through the northern boundary correlates well between both model simulations (R Â0.9). After downscaling with HAMSOM, the NAC inflow through the northern boundary decreases by Â10%, but the circulation in the Skagerrak is stronger in HAMSOM. The circulation patterns of both models are similar in the northern North Sea. The comparison suggests that the stretched global model system is a suitable tool for longterm free climate model simulations, and the only limitations occur in coastal regions. Regarding the regional studies focusing on the coastal zone, nested regional model can be a helpful alternative.

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Section: Circulation Differences Between Both Modelscontrasting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Assessment of a zoomed global model for the North Sea by comparison with a conventional nested regional model

Su¹,

Sein²,

Mathis³

et al. 2014

Tellus A: Dynamic Meteorology and Oceanography

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show abstract

“…The higher-resolution ocean model can then properly represent the roles of topography, tidal mixing, and fronts to produce a realistic ocean circulation. A similar effort has previously been performed for another shelf area, the North Sea (Ådlandsvik and Bentsen 2007).…”

Section: Introductionmentioning

confidence: 93%

Using the Regional Ocean Modeling System (ROMS) to improve the ocean circulation from a GCM 20th century simulation

2009

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Global coupled climate models are generally capable of reproducing the observed trends in the globally averaged atmospheric temperature. However, the global models do not perform as well on regional scales. Here, we present results from a 20-year, high-resolution ocean model experiment for the Atlantic and Arctic Oceans. The atmospheric forcing is taken from the final 20 years of a twentieth-century control run with a coupled atmosphere-ocean general circulation model. The ocean model results from the regional ocean model are validated using observations of hydrography from repeat cruises in the Barents Sea. Validation is performed for average quantities and for probability distributions in space and time. The validation results reveal that, though the regional model is forced by a coupled global model that has a noticeable sea ice bias in the Barents Sea, the hydrography and its variability are reproduced with an encouraging quality. We attribute this improvement to the realistic transport of warm, salty waters into

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“…Ådlandsvik and Bentsen 2007). Moreover, GCMs and ESMs are not optimised for shelf sea hydrodynamics and biogeochemistry, and some key processes relevant to North Sea dynamics, such as tides and physical and biogeochemical coupling at the sediment-water interface, are typically neglected.…”

Section: Introductionmentioning

confidence: 99%

Projected Change—North Sea

Schrum

Lowe

Meier

et al. 2016

North Sea Region Climate Change Assessment

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Increasing numbers of regional climate change scenario assessments have become available for the North Sea. A critical review of the regional studies has helped identify robust changes, challenges, uncertainties and specific recommendations for future research. Coherent findings from the climate change impact studies reviewed in this chapter include overall increases in sea level and ocean temperature, a freshening of the North Sea, an increase in ocean acidification and a decrease in primary production. However, findings from multi-model ensembles show the amplitude and spatial pattern of the projected changes in sea level, temperature, salinity and primary production are not consistent among the various regional projections and remain uncertain. Different approaches are used to downscale global climate change impacts, each with advantages and disadvantages. Regardless of the downscaling method employed, the regional studies are ultimately affected by the forcing global climate models. Projecting regional climate change impacts on biogeochemistry and primary production is currently limited by a lack of consistent downscaling approaches for marine and terrestrial impacts. Substantial natural variability in the North Sea region from annual to multi-decadal time scales is a particular challenge for projecting regional climate change impacts. Natural variability dominates long-term trends in wind fields and strongly wind-influenced characteristics like local sea level, storm C. Schrum

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Downscaling a twentieth century global climate simulation to the North Sea

Cited by 30 publications

References 22 publications

Assessment of a zoomed global model for the North Sea by comparison with a conventional nested regional model

Assessment of a zoomed global model for the North Sea by comparison with a conventional nested regional model

Using the Regional Ocean Modeling System (ROMS) to improve the ocean circulation from a GCM 20th century simulation

Projected Change—North Sea

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