By F. M. Faranda, L. Guglielmo, A. Ianora (auth.), Professor Dr. Francesco Maria Faranda, Professor Dr. Letterio Guglielmo, Dr. Adrianna Ianora (eds.)
The Antarctic represents the final of the world's nonetheless unexplored continents. considering that 1985, Italy has despatched 10 expeditions to this zone, 3 of these were completely dedicated to study at the marine ecology of the Ross Sea quarter. This quantity provides a world photograph of this learn. It contains contributions on water mass features, particulate natural topic and nutrient usage, and physiological facets of fundamental construction. additional themes are zooplankton, krill and most sensible predator interactions with regards to actual and organic parameters, ecological good points of coastal fish groups and the spatio-temporal variability of benthic biocenoses.
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The Antarctic represents the final of the world's nonetheless unexplored continents. seeing that 1985, Italy has despatched 10 expeditions to this sector, 3 of these were completely dedicated to learn at the marine ecology of the Ross Sea quarter. This quantity offers a world photograph of this study. It comprises contributions on water mass features, particulate natural topic and nutrient usage, and physiological points of fundamental construction.
Extra info for Ross Sea Ecology: Italiantartide Expeditions (1987–1995)
Weather 49 (6): 215-220 CHAPTER 3 Oxygen Isotope Characterization of Terra Nova Bay Seawater M. Dini and B. Stenni l ABSTRACT During the 1987-88 and 1989-90 Italian expeditions to Antarctica, seawater samples were collected in Terra Nova Bay (Western Ross Sea) in order to distinguish different water masses. The aim of this work was to identify, by means of stable isotope measurements, the presence of the High Salinity Shelf Water (HSSW), which seems to form in the polynya present in this region.
1991) highly negative 8180 values. According to the measured extremely low Si0 2 , PO, and total inormeasurements carried out in our laboratory over ganic carbon and high dissolved 0, contents that a period of several years, the mean 8 18 0 values are typical of a situation affected by pack ice of summer and winter precipitations in the area melting. A similar feature is also represented by of Terra Nova Bay range from -14 to -30%0 at sea the isotopic values of the surface layer measured level (Caprioli et al.
By a comparison of 8 180 and salinity data we were also able to identify the origin and outline the evolution of water masses that undergo freezing processes, dilution processes with ice-meltwater and interactions with the atmosphere. In particular, in the area of Terra Nova Bay a substantial presence of HSSW, apparently originating in this region, has been pointed out. According to this model, the persistent polynya acts as a "pump" in renewing shelf water mass circulation. The presence of Ice Shelf Water even below a small ice shelf such as Hell's Gate has been highlighted.