Surface water circulation patterns in the southeastern Bay of Biscay: New evidences from HF radar data

Solabarrieta, Lohitzune; Rubio, Anna; Castanedo, Sonia; Medina, Raúl; Charria, Guillaume; Hernández, Carlos

doi:10.1016/j.csr.2013.11.022

Cited by 62 publications

(81 citation statements)

References 45 publications

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“…4d), the cross-shore weak circulation is not reproduced, with a correlation between model and observation equal to 0.09, due to the mesoscale circulation in this area (e.g. Solabarrieta et al, 2014;Caballero et al, 2016). The agreement between observations and numerical simulation is improved for dominant along-shore currents.…”

Section: Bay Of Biscay General Circulationmentioning

confidence: 80%

“…Considered vertical profiles can be divided into two sources: Argo (Argo, 2000;Riser et al, 2016) profiles in the open ocean and RECOPESCA (Leblond et al, 2010;Charria et al, 2014;Lamouroux et al, 2016) profiles on the continental shelf. Figure 5 shows the difference between observed and modelled profiles for the year 2010 in temperature and salinity in the top layers.…”

Section: Vertical Hydrological Structurementioning

confidence: 99%

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Interannual evolution of (sub)mesoscale dynamics in the Bay of Biscay

Charria¹,

Theetten²,

Vandermeirsch³

et al. 2017

Ocean Sci.

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Abstract. In the north-east Atlantic Ocean, the Bay of Biscay is an intersection between a coastal constrained dynamics (wide continental shelf and shelf break regions) and an eastern boundary circulation system. In this framework, the eddy kinetic energy is 1 order of magnitude lower than in western boundary systems. To explore this coastal complex system, a high-resolution (1 km, 100 vertical sigma layers) model experiment including tidal dynamics over a period of 10 years (2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010) has been implemented. The ability of the numerical environment to reproduce main patterns over interannual scales is demonstrated. Based on this experiment, the features of the (sub)mesoscale processes are described in the deep part of the region (i.e. abyssal plain and continental slope). A system with the development of mixed layer instabilities at the end of winter is highlighted. Beyond confirming an observed behaviour of seasonal (sub)mesoscale activity in other regions, the simulated period allows exploring the interannual variability of these structures. A relationship between the winter maximum of mixed layer depth and the intensity of (sub)mesoscale related activity (vertical velocity, relative vorticity) is revealed and can be explained by largescale atmospheric forcings (e.g. the cold winter in 2005). The first submesoscale-permitting exploration of this 3-D coastal system shows the importance of (sub)mesoscale activity in this region with its evolution implying a potentially significant impact on vertical and horizontal mixing.

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Section: Bay Of Biscay General Circulationmentioning

confidence: 80%

Section: Vertical Hydrological Structurementioning

confidence: 99%

Interannual evolution of (sub)mesoscale dynamics in the Bay of Biscay

Charria¹,

Theetten²,

Vandermeirsch³

et al. 2017

Ocean Sci.

Self Cite

View full text Add to dashboard Cite

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“…In the context of surface currents, a large variety of potential error sources exists, like those associated to open boundary or meteorological forcing, bathymetry errors, bottom roughness errors, or deficiencies in turbulence parametrization. In addition, surface currents are affected by complex coupling processes between the current field, wind driven surface waves and the atmosphere (e.g., Solabarrieta et al, 2014;Staneva et al, 2016). The optimal treatment of these processes in numerical models is still subject of ongoing research and HFR data can play an important role in this context.…”

Section: Applications Of Hfr Measurements In the Framework Of The Eurmentioning

confidence: 99%

“…Related to the data uncertainties, it is worth mentioning that a number of validation exercises exist, based on comparisons of HFR currents against independent in situ measurements (Kohut and Glenn, 2003;Kaplan et al, 2005;Paduan et al, 2006;Ohlmann et al, 2007;Cosoli et al, 2010;Lorente et al, 2014Lorente et al, , 2015aSolabarrieta et al, 2014;Kalampokis et al, 2016). These validation exercises can be limited by the fact that part of the discrepancies observed through these comparisons are due to the specificities and own inaccuracies of the different measuring systems (Solabarrieta et al, 2014;Kalampokis et al, 2016). Indeed, the spatial and temporal scales measured with HFR are not the same that those of point-wise acoustic Doppler current profilers or drifters, so it can be expected that vertical or horizontal shear in currents contribute also to the RMSDs observed between measurements.…”

Section: Basic Principles Of Hfr Operation and Data Specificationsmentioning

confidence: 99%

HF Radar Activity in European Coastal Seas: Next Steps toward a Pan-European HF Radar Network

et al. 2017

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High Frequency Radar (HFR) is a land-based remote sensing instrument offering a unique insight to coastal ocean variability, by providing synoptic, high frequency and high resolution data at the ocean atmosphere interface. HFRs have become invaluable tools in the field of operational oceanography for measuring surface currents, waves and winds, with direct applications in different sectors and an unprecedented potential for the integrated management of the coastal zone. In Europe, the number of HFR networks has been showing a significant growth over the past 10 years, with over 50 HFRs currently deployed and a number in the planning stage. There is also a growing literature concerning the use of this technology in research and operational oceanography. A big effort is made in Europe toward a coordinated development of coastal HFR technology and its products within the framework of different European and international initiatives. One recent initiative has been to make an up-to-date inventory of the existing HFR operational systems in Europe, describing the characteristics of the systems, their operational products and applications. This paper offers a comprehensive review on the present status of European HFR network, and discusses the next steps toward the integration of HFR platforms as operational components of the European Ocean Observing System, designed to align and integrate Europe's ocean observing capacity for a truly integrated end-to-end observing system for the European coasts.

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“…In addition, the credibility of HF radar data has been previously tested in extensive validation studies, including direct comparisons of HF radar-derived surface currents against independent in situ sensors like moored ADCPs, point-wise current meters -PCMs hereinafter -, drifters or similar Kaplan et al, 2005;Cosoli et al, 2010;Solabarrieta et al, 2014 …”

Section: Introductionmentioning

confidence: 99%

Evaluating the surface circulation in the Ebro delta (northeastern Spain) with quality-controlled high-frequency radar measurements

Lorente¹,

Piedracoba²,

Soto‐Navarro³

et al. 2015

Ocean Sci.

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Abstract. The Ebro River delta is a relevant marine protected area in the western Mediterranean. In order to promote the conservation of its ecosystem and support operational decision making in this sensitive area, a three-site standard-range (13.5 MHz) CODAR SeaSonde high-frequency (HF) radar was deployed in December 2013. The main goal of this work is to explore basic features of the sea surface circulation in the Ebro deltaic region as derived from reliable HF radar surface current measurements. For this aim, a combined quality control methodology was applied: firstly, 1-year long (2014) real-time web monitoring of nonvelocity-based diagnostic parameters was conducted to infer both radar site status and HF radar system performance. The signal-to-noise ratio at the monopole exhibited a consistent monthly evolution, although some abrupt decreases (below 10 dB), occasionally detected in June for one of the radar sites, impacted negatively on the spatiotemporal coverage of total current vectors. It seemed to be sporadic episodes since radar site overall performance was found to be robust during 2014. Secondly, a validation of HF radar data with independent in situ observations from a moored current meter was attempted for May-October 2014. The accuracy assessment of radial and total vectors revealed a consistently high agreement. The directional accuracy of the HF radar was rated at better than 8 • . The correlation coefficient and root mean square error (RMSE) values emerged in the ranges [0.58-0.83] and [4.02-18.31] cm s −1 , respectively. The analysis of the monthly averaged current maps for 2014 showed that the HF radar properly represented basic oceanographic features previously reported, namely, the predominant southwestward flow, the coastal clockwise eddy confined south of the Ebro delta mouth, or the Ebro River impulsive-type freshwater discharge. The EOF analysis related the flow response to local wind forcing and confirmed that the surface current field evolved in space and time according to three significantly dominant modes of variability.

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Surface water circulation patterns in the southeastern Bay of Biscay: New evidences from HF radar data

Cited by 62 publications

References 45 publications

Interannual evolution of (sub)mesoscale dynamics in the Bay of Biscay

Interannual evolution of (sub)mesoscale dynamics in the Bay of Biscay

HF Radar Activity in European Coastal Seas: Next Steps toward a Pan-European HF Radar Network

Evaluating the surface circulation in the Ebro delta (northeastern Spain) with quality-controlled high-frequency radar measurements

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