Skip all navigation and jump to content Jump to site navigation
NASA Logo - Goddard Space Flight Center

+ NASA Homepage

    
Goddard Space Flight Center
About MODIS News Data Tools /images2 Science Team Science Team Science Team

   + Home
ABOUT MODIS
 

October 22, 2014

October 21, 2014

October 20, 2014

October 19, 2014

October 18, 2014

October 17, 2014

October 16, 2014

 

 

March 26, 2014 - Sediment off the coast of Tunisia
Sediment off the coast of Tunisia Image used for Spacing Purposes
Satellite: Aqua
Date Acquired: 3/17/2014
Resolutions: 1km (44.8 KB)
500m (155.2 KB)
250m (374.2 KB)
Bands Used: 1,4,3
Credit: Jeff Schmaltz
MODIS Land Rapid Response Team,
NASA GSFC

Swirls of turquoise and tan colored the waters off the coast of Tunisia in mid-March, 2014. The Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the Aqua satellite captured this true-color image on March 17.

Typical March weather for Tunisia is unsettled, with blowing wind and some precipitation. The brisk winds loft sand and dust into the air, often blowing it across the Gulf of Gabes, sometimes in large plumes. Precipitation also washes sediment into coastal waters. In addition, the aggressive tidal flows in the shallow Gulf of Gabes - maximum depth of water is less than 200 m (656 ft)- is responsible for washing beach sand and sediment into the offshore waters.

The variation in color may be attributed to a complex set of conditions, including the depth of the sediment in the waters. When sediment lies near the surface, it appears tan. As dust and sand sinks, the reflectance characteristics change. As it sinks, sediment appears turquoise or green from space.

FirstGov logo Privacy Policy and Important Notices NASA logo

Curator: Brandon Maccherone
NASA Official: Shannell Frazier

NASA Home Page Goddard Space Flight Center Home Page