Influence of high-resolution wind forcing on hydrodynamic modeling of the Gulf of Lions

Schaeffer, Amandine; Garreau, Pierre; Molcard, Anne; Fraunié, Philippe; Seity, Yann

doi:10.1007/s10236-011-0442-3

Cited by 38 publications

(25 citation statements)

References 72 publications

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“…When taking into account that QuikSCAT shows higher wind speeds than the buoy in the Gulf of Lion, these spatial patterns are robust (tested with a wind speed dependent QuikSCAT bias, not shown). Close to the eastern coast of the Gulf of Lion, intensified cooling has been observed during Mistral events and in coupled simulations (Small et al 2012;Schaeffer et al 2011). Renault et al (2012) studied a Tramontane event in coupled simulations and found a decreasing sea surface temperature in the western part of the Gulf of Lion.…”

Section: Effects Over the Mediterranean Seamentioning

confidence: 95%

Mistral and Tramontane wind speed and wind direction patterns in regional climate simulations

et al. 2016

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disentangle the results from large-scale error sources in Mistral and Tramontane simulations, only days with well simulated large-scale sea level pressure field patterns are evaluated. Comparisons with the observations show that the large-scale pressure patterns are well simulated by the considered models, but the orographic modifications to the wind systems are not well simulated by the coarse-grid simulations (with a grid spacing of about 50 km), and are reproduced slightly better by the higher resolution simulations. On days with Mistral and/or Tramontane events, most simulations underestimate (by 13 % on average) the wind speed over the Mediterranean Sea. This effect is strongest at the lateral borders of the main flow-the flow width is underestimated. All simulations of this study show a clockwise wind direction bias over the sea during Mistral and Tramontane events. Simulations with smaller grid spacing show smaller biases than their coarse-grid counterparts.

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Section: Effects Over the Mediterranean Seamentioning

confidence: 95%

Mistral and Tramontane wind speed and wind direction patterns in regional climate simulations

et al. 2016

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“…ALADIN runs at a resolution of 1/10 • and features data assimilation and state-of-the-art atmospheric physics (Fischer et al, 2005). The importance of such high spatial and temporal resolution in terms of oceanic response has been widely studied and demonstrated over the last few years, particularly to achieve a more realistic representation of the oceanic mesoscale circulation (Langlais et al, 2009;Schaeffer et al, 2011a).…”

Section: Modelmentioning

confidence: 99%

Assimilation of HF radar surface currents to optimize forcing in the northwestern Mediterranean Sea

Marmain

Molcard

Forget

et al. 2014

Nonlin. Processes Geophys.

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Abstract. HF radar measurements are used to optimize surface wind forcing and baroclinic open boundary condition forcing in order to constrain model coastal surface currents. This method is applied to a northwestern Mediterranean (NWM) regional primitive equation model configuration. A new radar data set, provided by two radars deployed in the Toulon area (France), is used. To our knowledge, this is the first time that radar measurements of the NWM Sea are assimilated into a circulation model. Special attention has been paid to the improvement of the model coastal current in terms of speed and position. The data assimilation method uses an ensemble Kalman smoother to optimize forcing in order to improve the model trajectory. Twin experiments are initially performed to evaluate the method skills. Real measurements are then fed into the circulation model and significant improvements to the modeled surface currents, when compared to observations, are obtained.

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“…Despite the relatively limited fetch in the wind jet region, the wave height can be relevant, interacting with bimodal features (Shimada and Kawamura, 2006). In this sense, several contributions have highlighted the influence of variable wind conditions in relatively smallscale areas (such as wind jet), influencing wind-wave generation (Shimada and Kawamura, 2006;Bolaños-Sanchez et al, 2007;Alomar et al, 2014) or modifying ocean circulation patterns (Csanady, 1980;Zhai and Bower, 2013;Schaeffer et al, 2011;Klaić et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Ocean–atmosphere–wave characterisation of a wind jet (Ebro shelf, NW Mediterranean Sea)

Grifoll

Navarro

Pallarés

et al. 2016

Nonlin. Processes Geophys.

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Abstract. In this contribution the wind jet dynamics in the northern margin of the Ebro River shelf (NW Mediterranean Sea) are investigated using coupled numerical models. The study area is characterised by persistent and energetic offshore winds during autumn and winter. During these seasons, a seaward wind jet usually develops in a ∼ 50 km wide band offshore. The COAWST (Coupled Ocean-Atmosphere-Wave-Sediment Transport) modelling system was implemented in the region with a set of downscaling meshes to obtain high-resolution meteooceanographic outputs. Wind, waves and water currents were compared with in situ observations and remote-sensingderived products with an acceptable level of agreement. Focused on an intense offshore wind event, the modelled wind jet appears in a limited area offshore with strong spatial variability. The wave pattern during the wind jet is characterised by the development of bimodal directional spectra, and the ocean circulation tends to present well-defined twolayer flow in the shallower region (i.e. inner shelf). The outer shelf tends to be dominated by mesoscale dynamics such as the slope current. Due to the limited fetch length, ocean surface roughness considering sea state (wave-atmosphere coupling) modifies to a small extent the wind and significant wave height under severe cross-shelf wind events. However, the coupling effect in the wind resource assessment may be relevant due to the cubic relation between the wind intensity and power.

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Influence of high-resolution wind forcing on hydrodynamic modeling of the Gulf of Lions

Cited by 38 publications

References 72 publications

Mistral and Tramontane wind speed and wind direction patterns in regional climate simulations

Mistral and Tramontane wind speed and wind direction patterns in regional climate simulations

Assimilation of HF radar surface currents to optimize forcing in the northwestern Mediterranean Sea

Ocean–atmosphere–wave characterisation of a wind jet (Ebro shelf, NW Mediterranean Sea)

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