South America Dust

This might be dust from Peru in this SeaWiFS image, which appears to be blowing westward -- perhaps underneath the clouds which are also visible in the image.
Source: Provided by the SeaWiFS Project, NASA/Goddard Space Flight Center, and ORBIMAGE

Por Carlos Solís
Phytoplankton bloom off Nova Scotia

The waters of the Gulf of St. Lawrence (top) are midnight blue in this Moderate Resolution Imaging Spectroradiometer (MODIS) image from the Aqua satellite on July 2, 2003. South of Nova Scotia (center), however, bright blue swirls in the water suggest a bloom of marine organisms, perhaps a kind of phytoplankton called a coccolithophore, a single-celled plant whose chalky white covering can cause the water to appear bright blue.
Source: Jeff Schmaltz, MODIS Rapid Response Team, NASA/GSFC

Por Carlos Solís