Alexandrium surface live counts. R/V Oceanus April 28 - May 5, 2008
(D. Anderson & D. McGillicuddy laboratories, Woods Hole Oceanographic Institution)
Our Georges Bank survey is complete (see map on right).
Surface live counts indicate cell concentrations ranging from zero to
several hundred cells per liter, with highest concentrations on the
northwest part of the bank. Tens to hundreds of cells per liter extend
through the western half of the crest to the southern flank. Two
distinct water mass anomalies are present on the southern flank: a warm
salty intrusion to the west, and a cold fresh tongue to the east, which
appears to have originated from a crossover of Scotian Shelf water
visible in satellite imagery. Both of these water mass anomalies are
nearly devoid of cells, thus these water mass anomalies may be
contributing to the relatively low cell concentrations on that part of
We are steaming to the WGOM now, and expect to complete transects at
Casco Bay, Saco Bay, Cape Ann, and Boston before it is time to head for
the barn. ETA in WH is between 0800 and 1000 Monday.