Three-mode principal component analysis of monitoring data from Venice lagoon

A data set obtained by 41 monthly determinations of 11 variables from 13 sa mpling sites in the Venice lagoon has been treated by three-mode principal component analysis. The results show that the sampling sites are grouped ac cording to their geographical location, following an inner-outer lagoon dir ection. In terms of sampling periods, a very strong seasonal effect has bee n detected, together with an almost linear decrease in nutrients (P and NO3 -) and increase in eutrophication. Copyright (C) 2000 John Wiley & Sons, Lt d.