Fall 2007 Update: Trends in Spring Conditions for the Georges Bank Subregion

Graphs of SST and chlorophyll data

The SST and chlorophyll data for Georges Bank were partitioned into time period/seasonal indices following the scheme described in the Spring 2007 Ecosystem Advisory, see: http://www.nefsc.noaa.gov/omes/OMES/spring2007/adv6.html. The SST time series for Georges Bank shows that the 2007 values continue the cooling trend of the past five years. The 2007 winter SST index was above the time series trend whereas the spring index was below the trend. Winter chlorophyll intensity and magnitude remained at levels similar to those observed in 2006. Spring chlorophyll intensity in 2007 was at the time series trend level, but 2007 spring bloom magnitude was very low reflecting a poorly developed spring bloom. The January-February zooplankton biomass estimate suggests a decrease in zooplankton during the winter of 2007. Zooplankton data from March-April and May-June 2007 is not yet available.

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