1,721,033 research outputs found
Applicazioni di tecniche di analisi multivariata ad una ricerca sulle acque costiere dell'area italo-franco-monegasca
No full textVariabilità interstagionale delle caratteristiche dei sedimenti sospesi in un’area deltizia (Nord Adriatico)
No full textDistribuzione dei minerali argillosi nei sedimenti della piattaforma continentale compresa tra Sestri Levante e La Spezia
No full textDispersione del materiale in sospensione nelle acque superficiali antistanti le foci dei fiumi Magra ed Arno
No full textCaratteristiche e distribuzione del materiale particolato sospeso nel Tirreno sud orientale (1994-1995)
No full textThe evolution of density currents and nepheloid bottom layers in the Ross Sea (Antarctica)
No full textIn this study we have analyzed the thermohaline, light transmission and particulate matter data, obtained in the western sector of the Ross Sea during the X Italian Expedition, for the purpose of investigating the evolution of the High Salinity Shelf Water in this area. In particular CTD data were used to estimate the baroclinic velocity field. Light transmission and total particulate matter data (from Niskin bottles mounted on a Carousel water sampler) were used to analyze the nepheloid layers and the evolution of the suspended sediments. This basin is characterized by a northward flow of very dense High Salinity Shelf Water (Ø = 1.95°C, S = 34.90), much colder than the incoming Circumpolar Deep Water (Ø = 1.20°C, S = 34.70). We obtained a scenario in which the High Salinity Shelf Water interacts with the Circumpolar Deep Water along the Antarctic Slope Front, and deviates from its geostrophic equilibrium. Interestingly, this cold dense water mixes with Circumpolar Deep Water at the shelf break and flows downward until it seems to disappear. Below this cold flow, a thin turbulent current has been observed, again moving northward with a high velocity 0.2–1.0 m s/1. This thin flow also contains high concentration of suspended matter produced by the interaction of the dense water and the bottom sediments. The various elementary mechanisms ruling the dynamics of such down-flows, namely the effects of topographic irregularities, bottom friction, Ekman benthic boundary layers or the effect of the variability of the Antarctic Circumpolar Current, which can push offshore the dense water, are discussed in this paper
Influenza del grazing mesozooplanctonico sui flussi di sedimentazione nel mare di Ross meridionale: risultati ottenuti da trappole per sedimenti
No full textUn approccio al problema della valutazione dei flussi orizzontali di sedimento negli ambienti ad alta energia attraverso l’uso di una nuova trappola per sedimenti
No full text
- …
