scholarly journals Circulation over the southeastern continental shelf and slope of the Mediterranean Sea: Direct current measurements, winds, and numerical model simulations

2007 ◽  
Vol 112 (C11) ◽  
Author(s):  
Zvi Rosentraub ◽  
Stephen Brenner
Keyword(s):  
Numerical Model ◽  
Continental Shelf ◽  
Mediterranean Sea ◽  
Direct Current ◽  
Model Simulations ◽  
The Mediterranean

scholarly journals A Synergetic Approach for the Space-Based Sea Surface Currents Retrieval in the Mediterranean Sea

2019 ◽  
Vol 11 (11) ◽  
pp. 1285 ◽  
Author(s):  
Daniele Ciani ◽  
Marie-Hélène Rio ◽  
Milena Menna ◽  
Rosalia Santoleri
Keyword(s):  
Numerical Model ◽  
Mediterranean Sea ◽  
Mediterranean Area ◽  
Hf Radar ◽  
Sea Surface ◽  
Reconstruction Method ◽  
Surface Currents ◽  
Basin Scale ◽  
The Mediterranean ◽  
Sicily Channel

We present a method for the remote retrieval of the sea surface currents in the Mediterranean Sea. Combining the altimeter-derived currents with sea-surface temperature information, we created daily, gap-free high resolution maps of sea surface currents for the period 2012–2016. The quality of the new multi-sensor currents has been assessed through comparisons to other surface-currents estimates, as the ones obtained from drifting buoys trajectories (at the basin scale), or HF-Radar platforms and ocean numerical model outputs in the Malta–Sicily Channel. The study yielded that our synergetic approach can improve the present-day derivation of the surface currents in the Mediterranean area up to 30% locally, with better performances for the the meridional component of the motion and in the western section of the basin. The proposed reconstruction method also showed satisfying performances in the retrieval of the ageostrophic circulation in the Sicily Channel. In this area, assuming the High Frequency Radar-derived currents as reference, the merged multi-sensor currents exhibited improvements with respect to the altimeter estimates and numerical model outputs, mainly due to their enhanced spatial and temporal resolution.

Illustrated Key to Ampelisca Species from the North-Eastern Atlantic

1988 ◽  
Vol 68 (4) ◽  
pp. 659-676 ◽  
Author(s):  
Jean-Claude Dauvin ◽  
Denise Bellan-Santini
Keyword(s):  
New Species ◽  
Continental Shelf ◽  
Mediterranean Sea ◽  
Intertidal Zone ◽  
Atlantic Coast ◽  
The North ◽  
North Eastern ◽  
The Mediterranean

The genus Ampelisca comprises more than 150 species and is one of the more important benthic genus of marine amphipods. New species are regularly added (Barnard & Agard 1986; Bellan-Santini & Marques, 1986; Goeke, 1987). Ampelisca are found from the intertidal zone to abyssal depths but most of them live on the continental shelf. In spite of many studies, it is often difficult to distinguish some species which are morphologically similar. In the last ten years, twenty-two species have been described from the north-eastern Atlantic (BellanSantini & Kaïm-Malka, 1977; Bellan-Santini & Dauvin, 1981, 1986; Dauvin & Bellan-Santini, 1982, 1985; Bellan-Santini & Marques, 1986). Materials come from MNHN of Paris collection, collected by Chevreux (1894–1924) (Dauvin & Bellan-Santini, 1985, 1986) and specimens collected during the last 25 years. All these new species are described from the Atlantic coast from northern Brittany to the Sahara and from the Mediterranean Sea.

scholarly journals Viral decay and viral production rates in continental-shelf and deep-sea sediments of the Mediterranean Sea

2010 ◽  
Vol 72 (2) ◽  
pp. 208-218 ◽  
Author(s):  
Cinzia Corinaldesi ◽  
Antonio Dell'Anno ◽  
Mirko Magagnini ◽  
Roberto Danovaro
Keyword(s):  
Continental Shelf ◽  
Mediterranean Sea ◽  
Deep Sea ◽  
Viral Production ◽  
Production Rates ◽  
Deep Sea Sediments ◽  
The Mediterranean

A revised definition of the genus Epileucon Jones (Crustacea, Cumacea) with descriptions of species from the deep Atlantic

1981 ◽  
Vol 291 (1052) ◽  
pp. 353-409 ◽  
Keyword(s):  
New Species ◽  
New Zealand ◽  
Continental Shelf ◽  
Mediterranean Sea ◽  
Geographical Distribution ◽  
Deep Water ◽  
Mediterranean Species ◽  
Males And Females ◽  
The Mediterranean ◽  
Definition Of

The genus Epileucon Jones, 1956 is redefined on the basis of carapace, pereon and appendage characters. The following species are transferred to Epileucon from the genus Leucon Kröyer, 1846: E. spiniventris (Hansen, 1920), E. longirostris (G. O. Sars, 1871), E. tenuirostris (G. O. Sars, 1887), E. latispina (Jones, 1963) and E. bengalensis (Lomakina, 1967). A lectotype is selected for E. spiniventris . Known Atlantic and Mediterranean species are redescribed, and five new species, E. ensis, E. pusillus, E. craterus, E. socius and E. acclivis , are described. Keys to males and females of the Atlantic and Mediterranean species are provided. The geographical distribution of the group is discussed. The genus is known in deep water (> 200 m) in the Atlantic, Pacific and Indian oceans and in the Mediterranean Sea, and also on the continental shelf (at around 100 m depth) off New Zealand.

scholarly journals High-resolution nested model simulations of the climatological circulation in the southeastern Mediterranean Sea

2003 ◽  
Vol 21 (1) ◽  
pp. 267-280 ◽  
Author(s):  
S. Brenner
Keyword(s):  
High Resolution ◽  
Continental Shelf ◽  
Mediterranean Sea ◽  
Seasonal Cycle ◽  
Internal Variability ◽  
Ocean Model ◽  
Heat Fluxes ◽  
Intermediate Model ◽  
Grid Model ◽  
The Mediterranean

Abstract. As part of the Mediterranean Forecasting System Pilot Project (MFSPP) we have implemented a high-resolution (2 km horizontal grid, 30 sigma levels) version of the Princeton Ocean Model for the southeastern corner of the Mediterranean Sea. The domain extends 200 km offshore and includes the continental shelf and slope, and part of the open sea. The model is nested in an intermediate resolution (5.5 km grid) model that covers the entire Levantine, Ionian, and Aegean Sea. The nesting is one way so that velocity, temperature, and salinity along the boundaries are interpolated from the relevant intermediate model variables. An integral constraint is applied so that the net mass flux across the open boundaries is identical to the net flux in the intermediate model. The model is integrated for three perpetual years with surface forcing specified from monthly mean climatological wind stress and heat fluxes. The model is stable and spins up within the first year to produce a repeating seasonal cycle throughout the three-year integration period. While there is some internal variability evident in the results, it is clear that, due to the relatively small domain, the results are strongly influenced by the imposed lateral boundary conditions. The results closely follow the simulation of the intermediate model. The main improvement is in the simulation over the narrow shelf region, which is not adequately resolved by the coarser grid model. Comparisons with direct current measurements over the shelf and slope show reasonable agreement despite the limitations of the climatological forcing. The model correctly simulates the direction and the typical speeds of the flow over the shelf and slope, but has difficulty properly re-producing the seasonal cycle in the speed.Key words. Oceanography: general (continental shelf processes; numerical modelling; ocean prediction)

Investigation of sea breeze and foehn in the Dead Sea valley with remote sensing observations and WRF model simulations

2020 ◽  
Author(s):  
Dorita Rostkier-Edelstein ◽  
Pavel Kunin ◽  
Pinhas Alpert
Keyword(s):  
Remote Sensing ◽  
High Resolution ◽  
Mediterranean Sea ◽  
Sea Breeze ◽  
Dead Sea ◽  
Modeling Tools ◽  
Model Simulations ◽  
Single Location ◽  
The Mediterranean ◽  
The Dead

<p>The atmospheric dynamics in the Dead Sea Valley has been studied for decades. However, the studies relied mostly on surface observations and simple coarse-model simulations, insufficient to elucidate the complex flow in the area. In this seminar I will present a first study using high resolution (temporal and spatial) and sophisticate both, measurements and modeling tools. We focused on afternoon hours during summer time, when the Mediterranean Sea breeze penetrates into the Dead Sea Valley and sudden changes of wind, temperature and humidity occur in the valley.</p><p>An intense observations period in the area, including ground-based remote sensing and in-situ observations, took place during August and November 2014. The measurements were conducted as part of the Virtual Institute DEad SEa Research Venue (DESERVE) project using the KITcube profiling instruments (wind lidars, radiometer and soundings) along with surface Energy Balance Station. These observations enabled analysis of the vertical profile of the atmosphere at one single location at the foothills of Masada, about 1 km west of the Dead Sea shore.</p><p>High resolution (1.1 km grid size) model simulations were conducted using the Advanced Research Weather version of the Weather Forecast and Research mesoscale model (WRF). The simulations enabled analysis of the 3D flow at the Dead Sea Valley, information not provided by the observations at a single location. Sensitivity tests were run to determine the best model configuration for this study.</p><p>Our study shows that foehn develops in the lee side of the Judean Mountains and Dead Sea Valley in the afternoon hours when the Mediterranean Sea breeze reaches the area. The characteristics of the Mediterranean Sea breeze penetration into the valley and of the foehn (e.g. their depth) and the impact they have on the boundary layer flow in the Dead Sea Valley (e.g. sudden changes in temperature, humidity and wind) are conditioned to the daily synoptic and mesosocale conditions. In the synoptic scale, the depth of the seasonal pressure trough at sea level and the height of inversion layers play a significant role in determining the breeze and foehn characteristics. In the mesoscale, the intensity of the Dead Sea breeze and the humidity brought by it determines the outcomes at the time of Mediterranean Sea breeze penetration and foehn development. Dynamically, the foehn is associated with a hydraulic jump.</p><p>Hypothetical model simulations with modified terrain and with warmer Mediterranean Sea surface temperature were conducted to reveal the relative contribution of each of these factors and of their synergism on the observed phenomena. The information provided by the factor separation study can be useful in future climate projections, when a warmer Mediterranean Sea is expected.</p><p>The forecasting feasibility of foehn and the sudden changes in the Dead Sea valley 24 hours in advance using WRF is suggested following the present study. These forecasts can be most valuable for the region affected by pollution penetration from the metropolitan coastal zone.</p>

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