Evidence of "Cross-over" Events in the
Broad-Scale Hydrography
Maureen Taylor, David Mountain, Cristina Bascuñán (NMFS)
Surface salinity distributions
are presented from the Broad-Scale CTD data in order to highlight intrusions of
relatively cold, low salinity (< 32 psu) Scotian Shelf water onto the
eastern portion of Georges Bank. At
least one "cross-over" event was observed during each year of the field
program. The largest and most
persistent intrusion(s) occurred during the 1997 field season (Figure K1, below).
The salinity distributions from the
February, April and May 1999 surveys are consistent with the presence of
Scotian Shelf water on the northeastern part of the Bank.
The overall Bank salinities during 1998 were
much lower than any of the other years.
Hydrographic
data are also presented from the spring resource surveys conducted by the
Northeast Fisheries Science Center (NMFS).
These surveys provide good coverage of the Georges Bank and Gulf of
Maine regions.
|