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Fall 2007 Update: Spring Conditions on the Northeast Shelf Ecosystem

Graphs of SST and plankton

Sea surface temperature conditions on the Northeast Shelf shifted from anomalously warm during late fall and winter of 2006 to cooler than average during spring 2007.  This trend persisted through the early summer with June temperatures still below normal.  The progression of chlorophyll concentrations suggests winter-spring blooms were above average, with early summer chlorophyll concentrations returning to average levels. Zooplankton biomass levels were above average through the winter months of 2006. Our first estimate of zooplankton biomass for 2007 suggests a dramatic decrease. However, it should be noted that the January-February zooplankton estimate is provisional.

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