Fall 2014 Update: Spring Bloom on the Northeast Shelf
Most regions of the Northeast Shelf Large Marine Ecosystem have a well developed spring phytoplankton bloom. The impact of the spring bloom will depend on multiple factors related to the time and duration of the bloom and how productive the constituent phytoplankton species are over time. The spring bloom for the Northeast Shelf ecosystem as a whole suggested the bloom was early and short lived in composite (see NES figure, for this and figures for ecoregions, dark green line is long-term mean bloom pattern, light green line 2014 bloom pattern, points are for 2014 data). A bloom could not be detected in the Gulf of Maine and Middle Atlantic Bight. In the GOM a bloom start transition from low to high chlorophyll was detected which could be interpreted as the beginning of a bloom; however, this transition was not matched with a high to low transition. The Middle Atlantic Bight area usually does not have a discrete, detectable spring bloom. A robust bloom was detected on Georges Bank and a smaller bloom was seen in the Scotian Shelf ecoregion. This analysis was based on a blended time series of MODIS and SeaWiFS remote sensing data that utilized a time and area correction between the two sensors.