Sediments and Phytoplankton in Caspian and Black Seas44.4N 48.4E
The bright colors in the northern part of the Caspian Sea are due partly to sediments from rivers such as the Volga, easily recognizable by its large, green delta, and the Ural, to the east of the former. They are also due in part to phytoplankton growth, which is likely encourages by the influx of nutrients from the two rivers. Upon opening the full image, the Black Sea can be observed to the west. The phytoplankton bloom that has been flourishing there over the last month (click here for previous images) has now almost completely waned.