scholarly journals Surface water circulation develops seasonally changing patterns of floating litter accumulation in the Mediterranean Sea. A modelling approach

2019 ◽  
Vol 149 ◽  
pp. 110619 ◽  
Author(s):  
D. Macias ◽  
A. Cózar ◽  
E. Garcia-Gorriz ◽  
D. González-Fernández ◽  
A. Stips
Keyword(s):  
Surface Water ◽  
Mediterranean Sea ◽  
Water Circulation ◽  
Litter Accumulation ◽  
Changing Patterns ◽  
The Mediterranean ◽  
Modelling Approach

scholarly journals A comparison between water circulation and terrestrially-driven dissolved silica fluxes to the Mediterranean Sea traced using radium isotopes

2018 ◽  
Vol 238 ◽  
pp. 496-515 ◽  
Author(s):  
Joseph Tamborski ◽  
Simon Bejannin ◽  
Jordi Garcia-Orellana ◽  
Marc Souhaut ◽  
Céline Charbonnier ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Water Circulation ◽  
Radium Isotopes ◽  
Dissolved Silica ◽  
The Mediterranean

First record of Amphiura securigera (Echinodermata: Ophiuroidea) in the Tyrrhenian (Mediterranean) Sea

2000 ◽  
Vol 80 (1) ◽  
pp. 175-176
Author(s):  
P. Rinelli
Keyword(s):  
Mediterranean Sea ◽  
First Record ◽  
Water Circulation ◽  
Brittle Star ◽  
Tyrrhenian Sea ◽  
Bathymetric Range ◽  
First Finding ◽  
The Mediterranean

The first finding of the brittle star Amphiura securigera (Echinodermata: Ophiuroidea) in the Tyrrhenian Sea is reported. According to literature data, biotopic and edaphic features of the bottom indicate that this species preferentially lives in detritic mud-free biotopes characterized by good water circulation. Present data show that in the Mediterranean Sea A. securigera extends its bathymetric range as far as the circalittoral and upper bathyal floors.

scholarly journals Thorium and protactinium isotopes as tracers of marine particle fluxes and deep water circulation in the Mediterranean Sea

2018 ◽  
Vol 199 ◽  
pp. 12-23 ◽  
Author(s):  
Sandra Gdaniec ◽  
Matthieu Roy-Barman ◽  
Lorna Foliot ◽  
Francois Thil ◽  
Arnaud Dapoigny ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Deep Water ◽  
Water Circulation ◽  
The Mediterranean ◽  
Particle Fluxes

scholarly journals The Mean Sea Level Equation and Its Application to the Mediterranean Sea

2014 ◽  
Vol 27 (1) ◽  
pp. 442-447 ◽  
Author(s):  
N. Pinardi ◽  
A. Bonaduce ◽  
A. Navarra ◽  
S. Dobricic ◽  
P. Oddo
Keyword(s):  
Surface Water ◽  
Mediterranean Sea ◽  
Sea Level ◽  
Water Flux ◽  
Mass Conservation ◽  
Volume Transport ◽  
Conservation Equation ◽  
Global Ocean ◽  
Mean Sea Level ◽  
The Mediterranean

Abstract A formalism to obtain a mean sea level equation (MSLE) is constructed for any limited ocean region and/or the global ocean by considering the mass conservation equation with compressible effects and a linear equation of state. The MSLE contains buoyancy fluxes terms representing the steric effects and the mass flux is represented by surface water fluxes and volume transport terms. The MSLE is studied for the Mediterranean Sea case using a simulation experiment for the decade 1999–2008. It is found that the Mediterranean MSL tendency is made of a steric contribution that is almost periodic in time superimposed on a stochastic-like signal due to the mass balance, dominating the MSL tendency. The MSL tendency stochastic-like term is a result of the imbalance between the volume flux at Gibraltar and the area average surface water flux.

scholarly journals Drifting Floats Reveal Nitrate Patterns in Mediterranean Sea

Eos ◽  
2016 ◽  
Vol 97 ◽  
Author(s):  
Kate Wheeling
Keyword(s):  
Surface Water ◽  
Mediterranean Sea ◽  
Next Generation ◽  
Physical Mechanisms ◽  
Nitrate Availability ◽  
The Mediterranean

Next-generation autonomous platforms allow scientists to understand physical mechanisms that control nitrate availability in the Mediterranean surface water.

scholarly journals Assessing the role of dust deposition on phytoplankton ecophysiology and succession in a low-nutrient low-chlorophyll ecosystem: a mesocosm experiment in the Mediterranean Sea

2013 ◽  
Vol 10 (5) ◽  
pp. 2973-2991 ◽  
Author(s):  
V. Giovagnetti ◽  
C. Brunet ◽  
F. Conversano ◽  
F. Tramontano ◽  
I. Obernosterer ◽  
...  
Keyword(s):  
Surface Water ◽  
Mediterranean Sea ◽  
Phytoplankton Community ◽  
Phytoplankton Bloom ◽  
Water Layer ◽  
Surface Water Layer ◽  
Saharan Dust ◽  
Dust Deposition ◽  
Pigment Analysis ◽  
The Mediterranean

Abstract. In this study, we investigate the response of the phytoplankton community, with emphasis on ecophysiology and succession, after two experimental additions of Saharan dust in the surface water layer of a low-nutrient low-chlorophyll ecosystem in the Mediterranean Sea. Three mesocosms were amended with evapocondensed dust to simulate realistic Saharan dust events, while three additional mesocosms were kept unamended and served as controls. The experiment consisted in two consecutive dust additions and samples were daily collected at different depths (−0.1, −5 and −10 m) during one week, starting before each addition occurred. Data concerning HPLC pigment analysis on two size classes (< 3 and > 3 μm), electron transport rate (ETR) vs. irradiance curves, non-photochemical fluorescence quenching (NPQ) and phytoplankton cell abundance (measured by flow cytometry), are presented and discussed in this paper. Results show that picophytoplankton mainly respond to the first dust addition, while the second addition leads to an increase of both pico- and nano-/microphytoplankton. Ecophysiological changes in the phytoplankton community occur, with NPQ and pigment concentration per cell increasing after dust additions. While biomass increases after pulses of new nutrients, ETR does not greatly vary between dust-amended and control conditions, in relation with ecophysiological changes within the phytoplankton community, such as the increase in NPQ and pigment cellular concentration. A quantitative assessment and parameterisation of the onset of a phytoplankton bloom in a nutrient-limited ecosystem is attempted on the basis of the increase in phytoplankton biomass observed during the experiment. The results of this study are discussed focusing on the adaptation of picophytoplankton to nutrient limitation in the surface water layer, as well as on size-dependent competition ability in phytoplankton.

scholarly journals Prokaryotic abundance and heterotrophic metabolism in the deep Mediterranean Sea

2010 ◽  
Vol 1 (1) ◽  
pp. 143 ◽  
Author(s):  
Rosabruna La Ferla ◽  
Maurizio Azzaro ◽  
Gabriella Caruso ◽  
Luis Salvador Monticelli ◽  
Giovanna Maimone ◽  
...  
Keyword(s):  
Carbon Cycle ◽  
Mediterranean Sea ◽  
Respiration Rate ◽  
Longitudinal Distribution ◽  
Large Spatial Scale ◽  
Prokaryotic Abundance ◽  
Changing Patterns ◽  
Gibraltar Strait ◽  
Heterotrophic Metabolism ◽  
The Mediterranean

A synthesis of field data carried out in the Mediterranean Sea are presented, aimed at contributing to the knowledge of three prokaryotic-mediated processes and their implications on the Carbon cycle. The distribution of exoenzymatic activities, secondary production and respiration rates was studied together with the prokaryotic abundances. Particular attention was paid to the meso- and bathypelagic layers which play an important role in the Mediterranean carbon cycle. The study is noteworthy because of its large spatial scale spanning the entire Mediterranean Sea over 4 years. In addition, two Atlantic stations in front of the Gibraltar Strait were investigated. The longitudinal distribution of prokaryotic activities and abundance along the MED showed different trends along the depthlayers. In particular, higher exoenzymatic rates were detected in the Eastern basin compared to the Western one; carbon respiration rate showed patterns variable with the sampling periods in the epipelagic and bathypelagic layers, while a consistent Westwards decreasing trend at the mesopelagic layers occurred. Specific enzyme activities per cell showed high values in the deepest layers for leucine aminopeptidase. Comparison with Carbon respiration rate data collected before the 2000s showed changing patterns of microbial heterotrophic processes in the Mediterranean Sea.

scholarly journals The effect of fluoride on the distribution of some minerals in the surface water of an Egyptian lagoon at the Mediterranean Sea

2015 ◽  
Vol 41 (1) ◽  
pp. 31-39 ◽  
Author(s):  
Ghada F. El-Said ◽  
Manal M. El-Sadaawy ◽  
Abeer A. Moneer ◽  
Nayrah A. Shaltout
Keyword(s):  
Surface Water ◽  
Mediterranean Sea ◽  
The Mediterranean
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