Dynamics and sea state in the Gulf of Naples: potential use of high-frequency radar data in an operational oceanographic context

Falco, P.; Buonocore, Berardino; Cianelli, Daniela; Luca, Livio de; Giordano, Alessandro M.; Iermano, I.; Kalampokis, Alkiviadis; Saviano, Simona; Uttieri, Marco; Zambardino, Giovanni; Zambianchi, Enrico

doi:10.1080/1755876x.2015.1115633

Cited by 35 publications

(55 citation statements)

References 76 publications

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“…The Gulf of Manfredonia is located on the western Adriatic coast (Fig. 1) in the transition zone from the north-central to the southern Adriatic Sea (Damiani et al, 1988;Spagnoli et al, 2004;Balestra et al, 2008;Focardi et al, 2009). The gulf is delimited by the Gargano Promontory to the north and the curvature of the coastline to the south.…”

Section: The Gulf Of Manfredoniamentioning

confidence: 99%

“…The gulf is delimited by the Gargano Promontory to the north and the curvature of the coastline to the south. The gulf differs from the rest of the central and southwestern Adriatic coast due its shallow depths, gently sloping bottom, abrupt coastline curvature, variable circulation, and eutrophic waters (Focardi et al, 2009;Campanelli et al, 2013;Marini et al, 2015). The gulf is a productive area that supports commercial fisheries for several species (Vaccarella et al, 1998;Grilli and Falcone, 2010;Borme et al, 2013), serves as a nursery area for sardines and anchovies (Morello and Arneri, 2009;Borme et al, 2013), and is a foraging area for sea turtles (Casale et al, 2012;Casale and Simone, 2017).…”

Section: The Gulf Of Manfredoniamentioning

confidence: 99%

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Linking sardine recruitment in coastal areas to ocean currents using surface drifters and HF radar: a case study in the Gulf of Manfredonia, Adriatic Sea

et al. 2018

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Understanding the role of ocean currents in the recruitment of commercially and ecologically important fish is an important step toward developing sustainable resource management guidelines. To this end, we attempt to elucidate the role of surface ocean transport in supplying recruits of European sardine (Sardina pilchardus) to the Gulf of Manfredonia, a known recruitment area in the Adriatic Sea. Sardine early life history stages (ELHSs) were collected during two cruises to provide observational estimates of their age-size relationship and their passive pelagic larval duration (PPLD). We combine these PPLDs with observations of surface ocean currents to test two hypotheses: (1) ELHSs are transported from remote spawning areas (SAs) by ocean currents to the Gulf of Manfredonia; (2) sardines spawn locally and ELHSs are retained by eddies. A historical surface drifter database is used to test hypothesis 1. Hypothesis 2 is tested by estimating residence times in the Gulf of Manfredonia using surface drifters and virtual particles trajectories that were computed from high-resolution observations of surface currents measured by a high-frequency (HF) radar net-work. Transport to the Gulf of Manfredonia from remote SAs seems more likely than local spawning and retention given a mismatch between observed PPLDs of 30-50 days and relatively short ( < 10-day) average residence times. The number and strength of connections between the gulf and remote SAs exhibit a strong dependence on PPLD. For PPLDs of 20 days or less, the gulf is connected to SAs on the western Adriatic coast through transport in the Western Adriatic Current (WAC). SAs on the east coast are more important at longer PPLDs. SAs in the northern and central Adriatic exhibit weak connections at all PPLD ranges considered. These results agree with otolith microstructure analysis, suggesting that the arrival of larvae in the gulf is characterized by repeated pulses from remote SAs. This is the first attempt to describe the processes related to Lagrangian connection to, and retention in, the Gulf of Manfredonia that will be complemented in the future using validated numerical ocean models and biophysical models.

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Section: The Gulf Of Manfredoniamentioning

confidence: 99%

Section: The Gulf Of Manfredoniamentioning

confidence: 99%

Linking sardine recruitment in coastal areas to ocean currents using surface drifters and HF radar: a case study in the Gulf of Manfredonia, Adriatic Sea

et al. 2018

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“…A growing number of European studies have been developed on the use of HFR data toward a better understanding of the surface ocean coastal dynamics (Shrira et al, 2001;Rubio et al, 2011;Schaeffer et al, 2011;Uttieri et al, 2011;Sentchev et al, 2013;Berta et al, 2014a;Shrira and Forget, 2015;Stanev et al, 2015;Falco et al, 2016). Moreover, since HFR data provide measurements of currents with a relatively wide spatial coverage and high spatial and temporal resolution in near real time (there are systems with lags of just 20 min, after generating the data), they have become invaluable tools in the field of operational oceanography.…”

Section: Introductionmentioning

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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“…Detailed knowledge of coastal currents is crucial for valid integrated coastal zone management, as well as for applications in case of pollution events and in search-and-rescue operations at sea. Among the various available ocean observing technologies, high frequency radars (HFRs) have unique characteristics that make them play a key role in coastal observatories (Bellomo et al, 2015;Falco et al, 2016). As land-based remote sensing instruments, these state of the art devices provide synoptic maps of surface current fields at high spatial resolution.…”

Section: Introductionmentioning

confidence: 99%

Segmentation of Sea Current Fields by Cylindrical Hidden Markov Models: A Composite Likelihood Approach

Ranalli

Lagona

Picone

et al. 2017

Journal of the Royal Statistical Society Series C: Applied Statistics

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Summary Motivated by segmentation issues in studies of sea current circulation, we describe a hidden Markov random field for the analysis of spatial cylindrical data, i.e. bivariate spatial series of angles and intensities. The model is based on a mixture of cylindrical densities, whose parameters vary across space according to a latent Markov field. It enables segmentation of the data within a finite number of latent classes that represent the conditional distributions of the data under specific environmental conditions, simultaneously accounting for unobserved heterogeneity and spatial auto‐correlation. Further, it parsimoniously accommodates specific features of environmental cylindrical data, such as circular–linear correlation, multimodality and skewness. Because of the numerical intractability of the likelihood function, estimation of the parameters is based on composite likelihood methods and essentially reduces to a computationally efficient expectation–maximization algorithm that iteratively alternates the maximization of a weighted composite likelihood function with weights updating. These methods are tested on simulations and exploited to segment the sea surface of the Gulf of Naples by means of meaningful circulation regimes.

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Dynamics and sea state in the Gulf of Naples: potential use of high-frequency radar data in an operational oceanographic context

Cited by 35 publications

References 76 publications

Linking sardine recruitment in coastal areas to ocean currents using surface drifters and HF radar: a case study in the Gulf of Manfredonia, Adriatic Sea

Linking sardine recruitment in coastal areas to ocean currents using surface drifters and HF radar: a case study in the Gulf of Manfredonia, Adriatic Sea

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

Segmentation of Sea Current Fields by Cylindrical Hidden Markov Models: A Composite Likelihood Approach

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