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July 30, 2015 - ESP Update

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Hi folks,
The ESP deployment season is ending very soon...
ESPjake, deployed on ESP-3 mooring in the eastern Gulf of Maine, has
done an outstanding job detecting the ongoing bloom in the coastal
current since deployment with peaks in 1000-2500 cells/L range occurring
throughout July. The latest ESP estimate from today (Thursday)
registered only about 200 cells/L, the lowest value in over 1 month,
indicating that the bloom may be on the decline. Furthermore, the more
recent peaks have also been consistently lower than earlier in July. The
dramatic day-to-day variability of the population indicates that the
population is likely located along a front near the western edge of the
Eastern Maine Coastal Current, so another spike could occur at any time,
but unfortunately, Jake will not be working much longer as his last run
will occur tomorrow (July 31). ESPjake will be out of resources and will
be out of of power soon as well. CTD data at 1.5m will continue into
early next week when the mission finally comes to an end.
For the latest time series plot from ESPjake, please see:

All 3 ESPs will be recovered in early August during a cruise on the R/V
Connecticut. Samples for /Alexandrium/ will be collected in both western
and eastern Gulf of Maine coastal waters across the mooring sites.
Please be aware that another hab-related cruise led by Dr. Kate Hubbard
on the R/V Tioga will work out of the Bar Harbor, ME region sampling
primarily for Pseudo-nitzschia sp. along several offshore transects as
well as some inshore areas. Kate will be responding to evidence of the
presence of Pseudo-nitzschia populations from samples collected by ME
DMR and its volunteers as that population often ramps up this time of year.
Before signing off, I also want to call your attention to a couple of
new drifters that Jim Manning (NOAA) and many others have assembled and
managed to deploy on short notice in response to the ESP detection of
the coastal bloom. Please see Jim's post with the latest update on the
drifter tracks in the Gulf of Maine.
We'll check back in with the cruise results when we return,
Bruce Keafer
Research Associate (ESP lab - Dr. Don Anderson)
Laboratory for Ocean Sensors and Observing Systems (LOSOS)
Mail Stop 57
Woods Hole Oceanographic Instituion
Woods Hole, MA 02543
508-289-2509 (LOSOS office and ESP lab)

Last updated: July 1, 2019

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