SOCIB operational ocean forecasting system and multi-platform validation in the Western Mediterranean Sea

Juza, Mélanie; Mourre, Baptiste; Renault, Lionel; Gómara, Sonia; Sebastián, Kristian; Lora, Sebastián; Beltrán, Joan Pau; Frontera, Biel; Garau, Bartolomé; Troupin, Charles; Torner, Marc; Heslop, Emma; Casas, Benjamín; Escudier, Romain; Vizoso, Guillermo; Tintoré, Joaquı́n

doi:10.1080/1755876x.2015.1117764

Cited by 75 publications

(73 citation statements)

References 40 publications

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“…The azimuthal velocity profile derived by the AMEDA algorithm from the AVISO geostrophic velocities (gray curve on Figure f) underestimated the in situ drifter velocities. Similar underestimation of surface currents derived from gridded altimetric maps in comparison with in situ measurements has been reported for the North Atlantic (Fratantoni, ), the Alboran Gyre (Juza et al, ), and the Ierapetra anticyclone (Ioannou et al, ), due to filtering, smoothing, and optimal interpolation of altimetric data. The position of the eddy center inferred from the AMEDA tracking tools corresponds to that deduced from the drifting buoy analysis (Figures a, c, and d).…”

Section: In Situ Observations and The Dual‐core Vertical Eddy Structuresupporting

confidence: 75%

High‐Resolution Observations and Tracking of a Dual‐Core Anticyclonic Eddy in the Algerian Basin

et al. 2018

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Mesoscale dynamics in the Mediterranean Sea have been investigated for years, and anticyclonic eddies are regularly observed features in the Algerian Basin. Here we used the AMEDA eddy detection algorithm to track and monitor a particular anticyclonic eddy from its birth to its death. The analysis of remote sensing data sets (AVISO and sea surface temperature) revealed that this anticyclone split from an Algerian eddy, in October 2015, interacted with the North Balearic Front and merged 7 months later, in May 2016, with a similar Algerian eddy. In early spring 2016, a field experiment during the ProtevsMed 2016 cruise thoroughly investigated this eddy, when it was located near the North Balearic Front, taking high‐resolution (Seasoar) hydrological transects, several Conductivity‐Temperature‐Depth (CTD) casts, and Lowered Acoustic Doppler Profiler measurements. In addition, four drifting buoys were released in the eddy core. These in situ measurements revealed that the vertical structure of this anticyclone was made of two water lenses of very different origins (Atlantic Water above and Western Intermediate Water below) spinning together. In the vicinity of the North Balearic Front, which may act as a dynamical barrier to such oceanic structures, the eddy interacted with a subsurface anticyclonic eddy made of modal water, which fostered cross‐front exchanges generating filaments by stirring. The high‐resolution sampling revealed fine‐scale structures both adjacent to the eddy and within its core.

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Section: In Situ Observations and The Dual‐core Vertical Eddy Structuresupporting

confidence: 75%

High‐Resolution Observations and Tracking of a Dual‐Core Anticyclonic Eddy in the Algerian Basin

et al. 2018

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“…A high-resolution numerical simulation of the WMOP model [19] is used to generate daily high-resolution SSH images from 2009 to 2013 for a 1/20 • grid. The along-track dataset is simulated by sampling the SSH images at real along-track positions issued from from multiple altimetry missions in 2014 and 2015 (see Figure 1).…”

Section: Methodsmentioning

confidence: 99%

Locally-adapted convolution-based super-resolution of irregularly-sampled ocean remote sensing data

López-Radcenco

Fablet

Bey

et al. 2017

2017 IEEE International Conference on Image Processing (ICIP)

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Super-resolution is a classical problem in image processing, with numerous applications to remote sensing image enhancement. Here, we address the super-resolution of irregularly-sampled remote sensing images. Using an optimal interpolation as the low-resolution reconstruction, we explore locally-adapted multimodal convolutional models and investigate different dictionary-based decompositions, namely based on principal component analysis (PCA), sparse priors and non-negativity constraints. We consider an application to the reconstruction of sea surface height (SSH) fields from two information sources, along-track altimeter data and sea surface temperature (SST) data. The reported experiments demonstrate the relevance of the proposed model, especially locally-adapted parametrizations with non-negativity constraints, to outperform optimally-interpolated reconstructions.

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“…Finally, the glider samples the Ibiza channel with several sections and returns to the Mallorca island following the same path. The first years of glider data have been used to study the water transport variability in the Ibiza channel (Heslop et al, ; Heslop, ) and to validate the SOCIB operational ocean forecasting system (Juza et al, , ). Heslop et al () analyze glider data between January and June 2011, and they demonstrate that the variations in the transport of water through the Ibiza channel over timescales of days to weeks can be as large as those previously identified as seasonal or eddy driven.…”

Section: Introductionmentioning

confidence: 99%

Temporal and Spatial Hydrodynamic Variability in the Mallorca Channel (Western Mediterranean Sea) From 8 Years of Underwater Glider Data

et al. 2019

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Eight years of glider data are used to characterize the temporal and spatial variability of a region in the western Mediterranean that will constitute one of the targets for the calibration phase of the Surface Water and Ocean Topography (SWOT) satellite mission. The characteristic horizontal dimension of mesoscale instabilities in the Mallorca channel is 6.0 km. The temporal evolution of intermediate water masses is dominated by an increase over time of the characteristic temperature values. Western Mediterranean and Levantine Intermediate waters display an increase of the temperature extrema of 0.064 ± 0.002 and 0.044 ± 0.002 °C/year between 2011 and 2018, respectively. At the layer of Levantine Intermediate water the salinity temporal regression reveals a mean trend of 0.010 year−1. Temperature annual cycle shows an averaged temperature gradient of ∼6 °C in 6 months at the upper layer, with a disconnection with the annual cycle at 100‐m depth. The circulation across the channel is dominated by high‐frequency variability. The signature of eddies with radius ranging from 5 to 18 km is apparent in 16% of the transects analyzed and mainly in spring and summer, with a dominance of subsurface cyclonic eddies. Two‐way flow controls the annual cycle of the water transport through the channel with prevalence of the inflow of Atlantic water. Variations of water transport over timescales of weeks to months can be similar to those identifiable as seasonal changes.

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SOCIB operational ocean forecasting system and multi-platform validation in the Western Mediterranean Sea

Cited by 75 publications

References 40 publications

High‐Resolution Observations and Tracking of a Dual‐Core Anticyclonic Eddy in the Algerian Basin

High‐Resolution Observations and Tracking of a Dual‐Core Anticyclonic Eddy in the Algerian Basin

Locally-adapted convolution-based super-resolution of irregularly-sampled ocean remote sensing data

Temporal and Spatial Hydrodynamic Variability in the Mallorca Channel (Western Mediterranean Sea) From 8 Years of Underwater Glider Data

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