Recent updates on the Copernicus Marine Service global ocean monitoring and forecasting real-time 1/12° high resolution system

Lellouche, Jean-Michel; Greiner, Eric; Galloudec, O. Le; Garric, Gilles; Régnier, Charly; Drévillon, Marie; Benkiran, Mounir; Testut, Charles-Emmanuel; Bourdallé‐Badie, Romain; Gasparin, Florent; Hernández, O; Levier, Bruno; Drillet, Yann; Rémy, E.; Traon, Pierre-Yves Le

doi:10.5194/os-2018-15

Cited by 31 publications

(49 citation statements)

References 3 publications

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“…The high‐resolution (1/12°) global Mercator Ocean reanalysis (hereafter GLORYS12) has been developed in the framework of the Copernicus Marine Environment Monitoring Service (CMEMS, http://marine.copernicus.eu/-and extends over a period of 25 years (1993–2017). This reanalysis is based on the current real‐time global forecasting CMEMS system (Lellouche et al., 2018) with a few changes in atmospheric forcing, assimilated data, and observation errors. Nucleus of European Modeling of the Ocean platform is the dynamical core of the physical model.…”

Section: Model and Data: Possible Signatures Of Trapped Wavesmentioning

confidence: 99%

Anatomy of Subinertial Waves Along the Patagonian Shelf Break in a 1/12° Global Operational Model

et al. 2020

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The Malvinas Current (MC), a major western boundary current of the South Atlantic Ocean, is an offshoot of the Antarctic Circumpolar Current (Figure 1a) that flows northward following the Subantarctic Front (SAF) along the eastern continental slope of South America. The MC, which borders one of the widest continental shelves of the world, is strongly controlled by bottom topography. Between 52°S and 49°S, the bottom slope is west-east orientated and gentle (2,000 m over 300 km) and the MC is rather wide (300 km) with mean northward surface velocities of 30 cm/s (Figures 1a and 1b). At 48°S, isobaths are east-west orientated and the MC mean surface velocities are zonal with a mean value of 40 cm/s. The largest mean surface velocities in the MC (>60 cm/s) are observed north of 43°S where the bottom slope is steep (Figures 1a and 1b) and the MC is organized in one narrow jet. South of 43°S, the MC is characterized by a relatively stable two-jet structure alienated with two bottom terraces (Piola et al., 2013). The mean location of the onshore jet corresponds to a northern branch of the SAF (SAF-N), while the main jet follows the main SAF along the 1,500-m isobath (Figure 1b; Artana et al., 2018). At 38°S, the MC encounters the Brazil Current forming the Brazil-Malvinas Confluence. The surface eddy kinetic energy (EKE) at this region is among the greatest in the world ocean with values exceeding 2,000 cm 2 /s 2 (Figure 1c). In contrast, the EKE in the MC is rather small (200 cm 2 /s 2) since the Malvinas Plateau filters a large part of the mesoscale activity from Drake Passage (Artana et al., 2016). In situ observations have pointed at the possible existence of trapped waves (TW) propagating northward along the Patagonian slope. Velocity spectra obtained from current-meter moorings deployed at 41°S across the slope near the Brazil Malvinas Confluence showed large energy peaks between 5 and 110 days (Vivier & Provost, 1999; Vivier et al., 2001). Despite these observations, there is still no characterization of TW along the Patagonian slope. As the TW propagates rapidly, they are not entirely resolved in satellite-altimetry-derived maps of sea level anomalies (SLAs) (Ballarotta et al., 2019).

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Section: Model and Data: Possible Signatures Of Trapped Wavesmentioning

confidence: 99%

Anatomy of Subinertial Waves Along the Patagonian Shelf Break in a 1/12° Global Operational Model

et al. 2020

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“…The NR was run up until the end of 2015, during which the period of 2008 to 2010 was used to generate simulated observations. The recent technical updates of modeling schemes and estimation tools applied to this system are detailed in Lellouche et al (2018).…”

Section: The Nature Run Configurationmentioning

confidence: 99%

Requirements for an Integrated in situ Atlantic Ocean Observing System From Coordinated Observing System Simulation Experiments

et al. 2019

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“…Since 19 October 2016, and in the framework of Copernicus Marine Environment Monitoring Service (CMEMS, http://marine.copernicus.eu/), Mercator Ocean delivers in real-time daily services (weekly analyses and daily 10 day forecasts) with a new global 1/128 high-resolution ocean model system (Lellouche et al, 2018). The vertical discretization comprises 50 levels with 22 levels in the upper 100 m. As a result, vertical resolution is 1 m near the surface and decreases to 450 m resolution near the bottom.…”

Section: Mercator Ocean Operational Modelmentioning

confidence: 99%

Fronts of the Malvinas Current System: Surface and Subsurface Expressions Revealed by Satellite Altimetry, Argo Floats, and Mercator Operational Model Outputs

et al. 2018

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We examine the surface and subsurface signature of ocean fronts closely associated with the Malvinas Current dynamics. We first evaluate the performances of the Mercator Ocean eddy permitting (1/12° spatial resolution) global operational system in the southwestern Atlantic Ocean over the last 10 years (2007–2016) using satellite, Argo float and in situ data collected near 41°S. Observations versus model comparisons show that the model correctly reproduces the general circulation and the complex hydrographic features of the study area including the vicinity of the Brazil‐Malvinas Confluence. The model outputs accurately match the observations except in June 2015. The causes for the June 2015 mismatch are analyzed. We then used the model and satellite altimetry to identify isolines of absolute dynamic topography (ADT) and potential density at different depths associated with the mean front location and establish their correspondence with specific water mass boundaries. Frontal displacements as depicted in satellite ADT, model ADT, and model potential density at 450 m are in general agreement. The ADT and potential density at 450 m provide nonidentical and complementary information on eddies shed by the Polar Front (PF): while ADT depicts the surface circulation with PF eddies entrained into the energetic circulation over the deep Argentine Basin, potential density at 450 m is more effective at monitoring PF eddies feeding the Malvinas Current.

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Recent updates on the Copernicus Marine Service global ocean monitoring and forecasting real-time 1/12° high resolution system

Abstract: 16Since October 19, 2016, and

Cited by 31 publications

References 3 publications

Anatomy of Subinertial Waves Along the Patagonian Shelf Break in a 1/12° Global Operational Model

Anatomy of Subinertial Waves Along the Patagonian Shelf Break in a 1/12° Global Operational Model

Requirements for an Integrated in situ Atlantic Ocean Observing System From Coordinated Observing System Simulation Experiments

Fronts of the Malvinas Current System: Surface and Subsurface Expressions Revealed by Satellite Altimetry, Argo Floats, and Mercator Operational Model Outputs

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