Developing a Pilot Operational Oceanography System for an Enclosed Basin

Petalas, Stamatios; Mamoutos, Ioannis; Dimitrakopoulos, Agisilaos-Alexandros; Sampatakaki, Angeliki; Zervakis, Vassilis

doi:10.3390/jmse8050336

Cited by 4 publications

(4 citation statements)

References 32 publications

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“…The Regional Ocean Modeling System [101,102] is the hydrodynamic model that was employed for the numerical simulations, and it has been used in various coastal-and basin-scale applications in the Mediterranean Sea [103][104][105][106][107][108][109][110][111][112][113][114].…”

Section: Model Description and Performancementioning

confidence: 99%

Dense Water Formation in the North–Central Aegean Sea during Winter 2021–2022

Potiris,

Mamoutos,

Tragou

et al. 2024

JMSE

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The evolution and drivers of dense water formation (DWF) in the North–Central Aegean Sea (NCAeg) during winter 2021–2022 are studied using observations from two Argo floats and the output of an operational data-assimilating model. Dense water with σθ>29.1 kgm−3 was produced over most of the NCAeg, except for the northeastern part covered by Black Sea water (BSW), where the maximum surface density was <29 kgm−3. The highest density waters were produced over the central and southern parts of the Lemnos Plateau and in the shallow coastal areas between Chios Island and the Edremit Gulf. Atmospherically driven transformation to the east of Lesvos Island resulted in the production of waters with anomalously high density and salinity, which flowed inside Skiros Basin, thus partly explaining its historically higher density and salinity compared to the rest of the NCAeg subbasins. The Skiros and Athos Basins were ventilated down to σθ∼29.35 kgm−3 horizons. The 29.1 kgm−3 isopycnal rose by ∼200 m, and the 29.25 kgm−3 isopycnal overflowed above the ∼400 m sill depth filling the southern depressions of the NCAeg. Combining data from Argo floats, vessel casts, gliders, and a fixed-point observatory, the dense water produced in the NCAeg was observed spreading in the deep layer of the Central Cretan Sea for at least one and a half years after the formation. The cyclonic circulation of the newly formed water in the NCAeg has been observed directly for the first time using deep-drifting floats. The Eastern Mediterranean warming and salinification signal has propagated below the NCAeg sill depth. The winter average buoyancy loss was comparable to that of the peak of the Eastern Mediterranean transient (EMT) and other known years of DWF in the NCAeg; however, the high temperature of the upper layers due to long-term warming prevented the widespread formation of denser water.

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Section: Model Description and Performancementioning

confidence: 99%

Dense Water Formation in the North–Central Aegean Sea during Winter 2021–2022

Potiris,

Mamoutos,

Tragou

et al. 2024

JMSE

Self Cite

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“…Coastal observatories that integrate different technologies are spreading in several countries in our environment to monitor eutrophication processes; some examples are the coastal observatory in the bay of Kalloni Bay in Greece [7] or the one developed in the Gulf of Trieste by the MED TOSCA project in Italy [8].…”

Section: Introductionmentioning

confidence: 99%

Monitoring System of the Mar Menor Coastal Lagoon (Spain) and Its Watershed Basin Using the Integration of Massive Heterogeneous Data

López-Andreu

López-Morales

Juárez

et al. 2022

Sensors

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The tool created aims at the environmental monitoring of the Mar Menor coastal lagoon (Spain) and the monitoring of the land use of its watershed. It integrates heterogeneous data sources ranging from ecological data obtained from a multiparametric oceanographic sonde to agro-meteorological data from IMIDA’s network of stations or hydrological data from the SAIH network as multispectral satellite images from Sentinel and Landsat space missions. The system is based on free and open source software and has been designed to guarantee maximum levels of flexibility and scalability and minimum coupling so that the incorporation of new components does not affect the existing ones. The platform is designed to handle a data volume of more than 12 million records, experiencing exponential growth in the last six months. The tool allows the transformation of a large volume of data into information, offering them through microservices with optimal response times. As practical applications, the platform created allows us to know the ecological state of the Mar Menor with a very high level of detail, both at biophysical and nutrient levels, being able to detect periods of oxygen deficit and delimit the affected area. In addition, it facilitates the detailed monitoring of the cultivated areas of the watershed, detecting the agricultural use and crop cycles at the plot level. It also makes it possible to calculate the amount of water precipitated on the watershed and to monitor the runoff produced and the amount of water entering the Mar Menor in extreme events. The information is offered in different ways depending on the user profile, offering a very high level of detail for research or data analysis profiles, concrete and direct information to support decision-making for users with managerial profiles and validated and concise information for citizens. It is an integrated and distributed system that will provide data and services for the Mar Menor Observatory.

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“…Two OTT Radar Level Sensors (RLS) sea-level gauges have been installed at two ports inside the Kalloni and Gera Gulfs, reporting at 10 min intervals. These data are used to calibrate the estimation of net water transports through the Gulf mouths via recording electric voltage differences between the opposiet coasts with the help of underwater telephone cables (Petalas et al, 2020).…”

Section: Sea-level Data and Water Exchangesmentioning

confidence: 99%

“…As such, they are characterized by gradual deepening towards the Strait connecting them to the open sea, and the lack of a sill in the Straits. They can be considered as typical Mediterranean islands embayments with the potential to exhibit quite variable and complex behaviour regarding their thermohaline functioning and contribution to the open sea (Petalas et al, 2020). Especially Kalloni Gulf is characterized by high productivity and biodiversity, supporting the competitive viability of coastal fishing.…”

Section: Introductionmentioning

confidence: 99%

The Development and Implementation of an Environmental Coastal Observatory focused on semi-enclosed Gulfs

Zervakis,

Tragou,

Mosiou

et al.

Global NEST International Conference on Environmental Science &Amp; Technology

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The recent post-Glacial Mediterranean sea-level rise converted mountain valleys to islandic embayments. These bays exhibit distinct hydrographic and biogeochemical characteristics, seasonally alternating thermohaline functioning and their coastal ecosystems support thriving coastal activities. The Kalloni Gulf, Lesvos island, Greece, constitutes a textbook example of the above type of embayments and -due to its proximity to the facilities of the University of the Aegean in the island’s capital, Mytilene- has become the focal point of the development of the prototype Coastal Environmental Observatory “AEGIS”. This laboratory has risen as the culmination of decade-long efforts of three Research Laboratories of the Department of Marine Sciences and includes both observational and forecasting components. The latter component comprises three levels of numerical modeling of the ocean circulation: The low-resolution (level 1) domain corresponds to the Central and North Aegean Sea, the intermediate domain (level 2) corresponds to the marine area surrounding Lesvos island, and the high-resolution model domains (level 3) refer to the three major islandic bays of the North Aegean Sea, i.e. the Kalloni and Gera Gulfs in Lesvos and Moudros Gulf in Lemnos island. The Regional Ocean Modeling System (ROMS) is used for simulating ocean circulation at level (1) and (2) models, while at the high-resolution domains the numerical model Delft3D-Flow is used. The model SWAN is used at all domains to simulate the wind-wave fields, while the biogeochemical model Delft3D-WAQ has been applied preoperationally on Kalloni Gulf. State-of-the art data assimilation is employed by the level 1 circulation model to minimize forecasting errors, using both field and remote observations. For validation and tuning of the level 3 models in the Gulf of Kalloni a coastal monitoring platform anchored in the middle of the Gulf provide meteorological, hydrographic and biochemical observations.

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Developing a Pilot Operational Oceanography System for an Enclosed Basin

Cited by 4 publications

References 32 publications

Dense Water Formation in the North–Central Aegean Sea during Winter 2021–2022

Dense Water Formation in the North–Central Aegean Sea during Winter 2021–2022

Monitoring System of the Mar Menor Coastal Lagoon (Spain) and Its Watershed Basin Using the Integration of Massive Heterogeneous Data

The Development and Implementation of an Environmental Coastal Observatory focused on semi-enclosed Gulfs

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