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Turbulence observations in the Gulf of Trieste under moderate wind forcing and different water column stratificationFalcieri, Francesco Marcello ...The oceanographic campaign CARPET2014 (Characterizing Adriatic Region Preconditionig EvenTs), (30 January-4 February 2014) collected the very first turbulence data in the Gulf of Trieste (northern ... Adriatic Sea) under moderate wind (average wind speed 10 m s-1) and heat flux (net negative heat flux ranging from 150 to 400 W m-2). Observations consisted of 38 CTD (Conductivity, Temperature, Depth) casts and 478 microstructure profiles (grouped into 145 ensembles) with three sets of yoyo casts, each lasting for about 12 consecutive hours. Averaging closely repeated casts, such as the ensembles, can lead to a smearing effect when in the presence of a vertical density structure with strong interfaces that can move up or down between subsequent casts under the influence of tides and internal waves. In order to minimize the smearing effect of such displacements on mean quantities, we developed an algorithm to realign successive microstructure profiles to produce sharper and more meaningful mean profiles of measured turbulence parameters. During the campaign, the water column in the gulf evolved from well-mixed to stratified conditions due to Adriatic waters intruding at the bottom along the gulf's south-eastern coast. We show that during the warm and relatively dry winter, the water column in the Gulf of Trieste, even under moderate wind forcing, was not completely mixed due to the influence of bottom waters intruding from the open sea. Inside the gulf, two types of water intrusions were found during yoyo casts: one coming from the northern coast of the Adriatic Sea (i.e. cooler, fresher and more turbid) and one coming from the open sea in front of the Po Delta (i.e. warmer, saltier and less turbid). The two intrusions had different impacts on turbulence kinetic energy dissipation rate profiles. The former, with high turbidity, acted as a barrier to wind-driven turbulence, while the latter, with low sediment concentrations and a smaller vertical density gradient, was not able to suppress downward penetration of turbulence from the surface.Vir: Ocean Science. - ISSN 1812-0784 (Vol. 12, 2016, str. 433-449)Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasleLeto - 2016Jezik - angleškiCOBISS.SI-ID - 3806543
Avtor
Falcieri, Francesco Marcello |
Kantha, Lakshmi |
Benetazzo, Alvise |
Bergamasco, Andrea |
Bonaldo, Davide |
Barbariol, Francesco |
Malačič, Vlado |
Sclavo, Mauro |
Carniel, Sandro
Teme
oceanografski podatki |
numerično modeliranje |
tokovanje |
veterno polje |
Jadransko morje |
hydrology |
hydrology |
oceanographic data |
numerical modelling |
wind forcing |
turbulence
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Avtor | Falcieri, Francesco Marcello ... |
Naslov | Turbulence observations in the Gulf of Trieste under moderate wind forcing and different water column stratification |
Datum objave | 2016-03-11 |
COBISS.SI-ID | 3806543 |
Verzija objave v repozitoriju | Založnikova različica |
Licenca objave v repozitoriju | Creative Commons Priznanje avtorstva 3.0 Nedoločena |
Embargo | Takojšnja javna objava |
Projekti, iz katerih je bila financirana objava
Naziv | Akronim | Številka projekta | Financer |
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Towards COast to COast NETworks of marine protected areas ( from the shore to the high and deep sea), coupled with sea-based wind energy potential. | COCONET | 287844 |
European Commission |
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Falcieri, Francesco Marcello | ![]() |
Kantha, Lakshmi | ![]() |
Benetazzo, Alvise | ![]() |
Bergamasco, Andrea | ![]() |
Bonaldo, Davide | ![]() |
Barbariol, Francesco | ![]() |
Malačič, Vlado | 05226 |
Sclavo, Mauro | ![]() |
Carniel, Sandro | ![]() |
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