Abstract. Elevated surface chlorophyll-a (chl-a) concentration ([chl-a]), an index of phytoplankton biomass, has been previously observed and documented by remote sensing in the waters to southwest Sable Island (SI) on Scotian Shelf eastern Canada. Here, we present analysis this phenomenon using a 21-year time series satellite-derived [chl-a], paired with information particle backscattering coe...