Modelling the Pelagic Ecosystem Dynamics: The NW Mediterranean

Cruzado, Antonio; Bernardello, Raffaele; Ahumada-Sempoal, Miguel Ángel; Bahamón, Nixon

doi:10.5772/39267

Cited by 2 publications

(2 citation statements)

References 63 publications

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“…Ecosystem models can be used to simulate a broad range of biogeochemical variables, describing their dynamics in relation to the physics of the studied area. A variety of biogeochemical models have been implemented in the Mediterranean Sea (Petihakis et al, 2002(Petihakis et al, , 2009(Petihakis et al, , 2014Triantafyllou et al, 2003a;Lazzari et al, 2012;Cruzado and Bernardello, 2012;Christodoulaki et al, 2013;Tsiaras et al, 2014;). However, model outputs are subjected to uncertainties related to the model structure, parameterization schemes, forcing and initial conditions (Anderson, 2005;Shimoda and Arhonditsis, 2016).…”

Section: Introductionmentioning

confidence: 99%

Data assimilation of depth-distributed satellite chlorophyll-α in two Mediterranean contrasting sites

Kalaroni

Tsiaras

Petihakis

et al. 2016

Journal of Marine Systems

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A new approach for processing the remote sensing chlorophyll-α (Chl-α) before assimilating into an ecosystem model is applied in two contrasting, regarding productivity and nutrients availability, Mediterranean sites: the DYFAMED and POSEIDON E1-M3A fixed point open ocean observatories. The new approach derives optically weighted depth-distributed Chl-α profiles from satellite data based on the model simulated Chl-α vertical distribution and light attenuation coefficient. We use the 1D version of the operational ecological 3D POSEIDON model, based on the European Regional Seas Ecosystem Model (ERSEM). The required hydrodynamic properties are obtained (off-line) from the POSEIDON operational 3D hydrodynamic Mediterranean basin scale model. The data assimilation scheme is the Singular Evolutive Interpolated Kalman (SEIK) filter, the ensemble variant of the Singular Evolutive Extended Kalman (SEEK) filter. The performance of the proposed assimilation approach was evaluated against the Chl-α satellite data and the seasonal averages of available in-situ data for nitrate, phosphate and Chl-α. An improvement of the model simulated near-surface and subsurface maximum Chl-α concentrations is obtained, especially at the DYFAMED site. Model nitrate is improved with assimilation, particularly with the new approach assimilating depthdistributed Chl-α, while model phosphate is slightly worse after assimilation. Additional sensitivity experiments were performed, showing a better performance of the new approach under different scenarios of model Chl-α deviation from pseudo-observations of surface Chl-α.

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Section: Introductionmentioning

confidence: 99%

Data assimilation of depth-distributed satellite chlorophyll-α in two Mediterranean contrasting sites

Kalaroni

Tsiaras

Petihakis

et al. 2016

Journal of Marine Systems

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“…Western Mediterranean Deep Water (WMDW): These waters, as said earlier, are one of the principal water masses of the western Mediterranean Sea that fill its deeper part (>1000-1200 m), having an average potential temperature of 12.5-14.5 • C and a salinity of S = 37.7-38.6 [59]. WMDW is mainly formed within the cyclonic gyre of the Gulf of Lions by open sea convection; the latter is associated with the presence of strong northerly winds (Mistral), which induce excessive heat loss reaching 1000 W/m 2 .…”

Section: Deep Watersmentioning

confidence: 98%

Water Masses of the Mediterranean Sea and Black Sea: An Overview

Poulos

2023

Water

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This overview presents the different water masses present in the various primary and secondary marine regions of the Mediterranean Sea and Black Sea, providing information on their main physical characteristics (i.e., temperature, salinity, density), the water depths at which they have been observed and the processes involved in their formation. There is a characteristic difference in the overall hydrology of the Mediterranean Sea compared to the Black Sea, in terms of the number and characteristics of water masses and their formation processes, although they form a single (integrated) marine system. This difference is explained by the limited communication between the two seas through the Sea of Marmara and its straits (the Dardanelles and Bosporus) and by the fact that the Mediterranean Sea is a condensation basin while the Black Sea is a dilution basin; therefore, the deficit of water in the former is compensated by the inflow of Atlantic waters, while the surplus in the latter outflows to the Aegean Sea. In total, 21 different water masses have been identified in the Mediterranean Sea (excluding the Straits of Gibraltar and the Sea of Marmara) compared to the 5 water masses identified in the Black Sea (excluding the Sea of Azov). This large number of water masses is attributed to coastal morphology (i.e., presence of straits) and submarine relief (i.e., deep basin separated by shallow sills) and different formation processes.

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Modelling the Pelagic Ecosystem Dynamics: The NW Mediterranean

Cited by 2 publications

References 63 publications

Data assimilation of depth-distributed satellite chlorophyll-α in two Mediterranean contrasting sites

Data assimilation of depth-distributed satellite chlorophyll-α in two Mediterranean contrasting sites

Water Masses of the Mediterranean Sea and Black Sea: An Overview

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