Author:
BERGAMASCO A.,DEFENDI V.,ZAMBIANCHI E.,SPEZIE G.
Abstract
This paper presents the results of the analysis of hydrological data of a 5-day mesoscale
experiment (53 CTD casts) conducted during the XIIIth Italian Expedition to Antarctica (1997–98 cruise) in
the framework of the CLIMA (Climatic Longterm Interaction for the Mass balance in Antarctica) Project of
the Italian National Programme for Antarctic Research (PNRA). The experiment site was chosen for
studying the dense water overflow in relation to the shelf-break in the central Ross Sea, after a large-scale
synoptic survey, aimed to detect the general hydrological characteristics of the basin. A classical θ/S analysis
was carried out for better understanding of the shelf-slope connection and the interactions between the water
masses of this zone: the Circumpolar Deep Water (CDW) coming from the oceanic domain and the Ice Shelf
Water (ISW) spreading from the Ross Ice Shelf (RIS) edge. Our results show the evidence of an overflow of
dense water, originated on the continental shelf, on the shelf-break. This supercold water signal is found on
the continental slope down to 1200 m depth. The shape of this tongue of modified ISW, whose thickness
reaches up to 100 m, is very narrow, suggesting that the overflow occurs in very localized areas.
Publisher
Cambridge University Press (CUP)
Subject
Geology,Ecology, Evolution, Behavior and Systematics,Oceanography
Cited by
33 articles.
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