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Fall 2009 Update: Spring Conditions on the Northeast Shelf Ecosystem

Surface temperature, chlorophyll and zooplankton biomass values are shown from July 2008 to June 2009.The Northeast Shelf Large Marine Ecosystem experienced minor fluctuations in sea surface temperatures during the first half of 2009. There was a transient warming event followed by a cooling event during May into June. Over the past year, SSTs tended to track average conditions. The first half of 2009 was however marked by a large spring bloom event, repeating the pattern in bloom development observed last year. The spring bloom developed earlier than usual and had much higher chlorophyll concentrations than the long term mean. Zooplankton biomass levels were at average or slightly elevated levels, perhaps reflecting the higher primary productivity levels in the ecosystem over recent years

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