03 Mar '12, 11pm

Hydrogen Sulfide Emissions off of Africa: Bright green hues span roughly 150 kilometers along the Namibian coast...

Pale green patterns tinted the water along the Namibian coast in late February 2012. But unlike other bright hues that occasionally show up in the ocean, these colors didn’t result from a phytoplankton bloom. Scientists have long known that hydrogen sulfide gas is emitted periodically along the Namibian coast. Ocean currents carry oxygen-poor water to the region, and chemical and biological processes can deplete what little oxygen is available. The sediments in the local seafloor are also rich with organic matter. When organic matter decays in an oxygen-poor environment, hydrogen sulfide emissions can result. Before the satellite era, residents of the region could detect the hydrogen sulfide emissions thanks to the pervasive rotten-egg smell. But satellites’ “eyes in the sky” have shown just how big and long-lasting the emission events can be. The Moderate Resolution Imagi...

Full article: http://earthobservatory.nasa.gov/IOTD/view.php?id=77287&s...

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Hydrogen Sulfide Emissions off of Africa: Brigh...

earthobservatory.nasa.gov 03 Mar '12, 11pm

Pale green patterns tinted the water along the Namibian coast in late February 2012. But unlike other bright hues that occ...

Hydrogen Sulfide Emissions off of Africa : Imag...

earthobservatory.nasa.gov 04 Mar '12, 3am

Pale green patterns tinted the water along the Namibian coast in late February 2012. But unlike other bright hues that occ...

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