Research Document - 2002/71
Trends in stratification on the Inner Newfoundland Shelf
By J. D. C. Craig and E. B. Colbourne
Abstract
The time series of the stratification at Station 27 shows a continuation of the increasing trend first seen in the early 1990s, reaching near record levels in recent years. The increase in stratification appears to be in response to reduced salinity. Increased stratification over the last decade of the new (1971-2000) reference period resulted in a higher mean stratification than that for the old (1961-1990). As a result, the anomalies are about 0.002 kg m-4 lower with respect to the new reference period. The mean annual signal for this period was broader and about 7 percent higher than the previous one.
Increased stratification over the past year was a result of almost equal contributions of reduced salinity and increased temperatures during the summer and fall of 2001. A long term decreasing trend in salinity was observed.
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