Mixed with white streaks of clouds, a huge plume of African dust is blowing over the United Kingdom (left) in this Moderate Resolution Imaging Spectroradiometer (MODIS) image from the Terra satellite on April 15, 2003. In the waters of the North Sea between the UK and Denmark (to the east), the water is swirling with color that could indicate a mixture of sediment and marine plant life.
Image courtesy Jesse Allen, based on data from the MODIS Rapid Response Team at NASA GSFC