This image, from February 26th, 1998, shows the Golfo de Cádiz, and Portugal and Spain at the top of the image, with the Cabo de Santa Maria pointing out into the Atlantic Ocean. High pigment concentrations can be seen around Huelva on the Spanish coast.

Image provided by the Deutsches Zentrum für Luft- und Raumfahrt, DLR (German Aerospace Centre).