Fall 2010 Update: Data Sources
Sea Surface Temperatures (SSTs) were derived from three data sources: the Advanced Very-High Resolution Radiometer onboard the Polar Orbiting Environmental Satellite (AVHRR-POES); the MODIS Terra sensor; and the MODIS Aqua sensor. The SST data represent surface ocean temperatures, not the temperature of the entire water column.
Synoptic views of surface concentrations of chlorophyll a were derived from the Sea-viewing Wide Field of View Sensor (SeaWiFS) and the Moderate Resolution Imaging Spectroradiomater on the Aqua satellite (MODIS-Aqua). Data from these ocean color sensors were obtained from the NASA Ocean Biology Processing Group. These data sources were combined to characterize trends in chlorophyll a during 2008 and 2009; however, known discrepancies exist between the two sensors so the recent data should be considered provisional until an upcoming data reprocessing is completed. Chlorophyll a is considered a proxy for the phytoplankton biomass in the near-surface water.
Atlantic cod food habits data were obtained from the NEFSC's FHDBS (food habits) and SVDBS (fish surveys) databases. Consumption estimates represent the quantity (in weight) of red hake eaten by cod.
Indices of larval herring on Georges Bank are based on data collected from MARMAP and ECOMON plankton surveys for zooplankton and larval fish.