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VÉZINA, A.F., P. VINET, L.D. CASTONGUAY, 1992. Structure thermohaline et biologique de la couche de surface de l'estuaire maritime du Saint-Laurent. I, Juin-juillet 1989. Rapp. stat. can. sci. halieut. aquat., 894(1), 25 p .
This report presents the vertical profiles of temperature, salinity, in vivo fluorescence, and nitrate concentration that were obtained during a series of cruises conducting high-resolution sampling in the lower St. Lawrence Estuary between 19 June and 14 July 1989. The 255 profiles that were kept following scrutiny of the data were reduced to six major modes of variation by the method of empirical orthogonal functions. The first three modes, which explain more than 55 % of the total variation, are mapped and show the progression of the dramatic changes in the physical and biological structure taking place between cruises separated by not more than one week. The variation on a quasi-synoptic scale were even more important than was anticipated, and the processes responsible for these variations have not yet been elucidated.
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