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Long-Term Trends for Surface Chlorophyll-a in the Chesapeake Bay: 1999-2013

Long-term trends were computed by state partners using the Seasonal Kendall non-parametric technique for annual data collected from 1999-2013. Highly significant trends are indicated with triangles and possible trends are show with colored circles. Surface chlorophyll-a concentrations are decreasing/improving significantly at 2 stations, possibly decreasing at 7 stations, increasing/degrading significantly at 25 stations, and possibly increasing at 16 stations.

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