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Research Document - 2001/085

Preliminary Studies of Density Stratification and Fluorescence on the Newfoundland Shelf

By J. D. C. Craig, E. B. Colbourne and G. L. Maillet

Abstract

Fluorescence, salinity and temperature data were examined for station 27 and the Flemish Cap transect on the Newfoundland Shelf. Anomalies calculated for the density stratification based on monthly means and harmonic regressions yielded similar results. Alternative methods of determining the degree of stratification and estimating the mixed later depth were explored and compared. Both temperature and salinity contribute significantly to the annual cycle in stratification on the Newfoundland shelf, however the variation in salinity was primarily responsible for the recent increasing trend in the observed stratification. The timing of the spring bloom coincided with the onset of stratification at station 27.

Representative fluorescence and density data were compared on temporal and spatial domains.

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