Spring 2007 Update: Annual Chlorophyll

From examination of temporal trends in satellite derived surface chlorophyll for the past eight years, it is evident that there is a high degree of year-to-year variability in the shelfwide chlorophyll index in each of the four subareas. Although this time series of observations is relatively short, the trends for GOM, GB and SNE are similar, showing a down-trend in recent years and a marked increase in 2006. The most northern and southern areas, Gulf of Maine and Mid Atlantic Bight, also have the most variable measurements as indicated by coefficients of variation, which are higher in these areas than in Georges Bank or Southern New England.

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