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 solely dedicated to examine at the marine ecology of the Ross Sea quarter. This quantity offers a world photograph of this learn. It comprises contributions on water mass features, particulate natural topic and nutrient usage, and physiological facets of fundamental creation. additional themes are zooplankton, krill and most sensible predator interactions with regards to actual and organic parameters, ecological positive aspects of coastal fish groups and the spatio-temporal variability of benthic biocenoses.
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Additional info for Ross Sea Ecology: Italiantartide Expeditions (1987–1995)
Example text
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.
Below the AASW, two water layers may be detected on the basis of their salinity and 8180 values (labelled in Fig. 6 as HGWI and HGW2, where HGW = Hell's Gate Water). The origin of HGWI and HGW2 (Fig. 6) can be explained in two different ways: 1. 22%0), their values being intermediate. 2. Melting of continental basal ice and successive freezing underneath the shelf, even though this possibility should be excluded by the continuous presence of marine ice below Hell's Gate found by Souchez et al. (1991) and Tison et al.
040026). The authors are grateful to the members of the 1987-88 and 1989-90 Italian expeditions to Antarctica, who carried out the fieldwork and collected the samples studied. References Baroni C, Stenni B,Iacumin P (1991) Oxygen isotopic composition of ice samples from the Hell's Gate and Backstairs Passage Ice Shelves (Victoria Land, Antarctica): evidence of bottom freezing. Mem Soc Geol Ital 46: 45-48 Boldrin A, Stocchino C (1990) On the hydrological characteristic of Terra Nova Bay. National Scientific Commission for Antarctica, Oceanographic Campaign 1987-88, Data Rep Part 1, Genova, pp 11-57 Bromwich DH, Kurtz DD (1984) Katabatic wind forcing of the Terra Nova Bay polynya.
