200
S. Tucci et al.
Fig- 2. Transect showing vertical distribution of TPM along the RIS
comprising stations 15 to 85, using values of total suspended matter (Fig. 3).
The higher values are located in two different water masses. In the area of the
RIS, the suspended matter seems to spread northwards in waters from 100 to 400
m in depth and near the bottom, and even affects station 67. A second interesting
concentration area is centered in surface waters at stations 67, 72 and 81.
Horizontal TPM distributions at different depths are also interesting. The surface distribution (Fig. 4a) indicates two areas of maximum concentration. The
first is connected with the RIS and the second with the external part of the continental shelf, at the limit of the shelf-break. In waters close to the bottom (Fig. 4b)
the maximum values are relative to the central part of the RIS, with a northwards
diffusion along two different paths. There is also a sector of greater concentration
at the edge of the shelf.
Fig. 3. Transect showing vertical distribution of TPM in a south-north section
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