01 Jun '11, 7pm

Sulfur Dioxide plume from Grímsvötn [image] #NASA

Sulfur Dioxide plume from Grímsvötn [image] #NASA

Sulfur dioxide, or SO2 , is a colorless, pungent gas that can be both air pollutant and important atmospheric component, depending on where it resides. Along with water vapor and carbon dioxide, sulfur dioxide is one of the most abundant emissions during volcanic eruptions. The images above, along with the linked animation, show the emission and transport of sulfur dioxide from the Grímsvötn Volcano in Iceland at the end of May 2011. The images are based on measurements from the Atmospheric Infrared Sounder (AIRS) on NASA’s Aqua spacecraft that were input into the Goddard Earth Observing System, Version 5 (GEOS-5) experimental model, which characterizes the background wind fields. The concentration of SO2 is represented in purple, with the small arrows depicting dominant wind direction. Over several days, the plume spreads north and then thousands of miles to the east and ...

Full article: http://earthobservatory.nasa.gov/NaturalHazards/view.php?...

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Ash Plume from Puyehue-Cordón Caulle [image] #NASA

Ash Plume from Puyehue-Cordón Caulle [image] #NASA

earthobservatory.nasa.gov 13 Jun '11, 10pm

On June 4, 2011, Puyehue-Cordón Caulle in Chile experienced its first major eruption in decades. The volcano sent an ash p...

The eruption of Iceland’s Grímsvötn Volcano as ...

earthobservatory.nasa.gov 23 May '11, 7pm

About 14 months after Eyjafjallajökull rumbled to life, another volcano on Iceland began spewing ash and steam. At approxi...

Grímsvötn, Volcano Injects Ash into the Stratosphere [image] #NASA

Grímsvötn, Volcano Injects Ash into the Stratos...

earthobservatory.nasa.gov 25 May '11, 7pm

Grímsvötn, the most active of Iceland’s volcanoes, began erupting around 5:30 p.m. local time on Saturday, May 21, 2011. T...

Eruption of Grímsvötn Volcano, Iceland [image] ...

earthobservatory.nasa.gov 23 May '11, 10pm

One year after Eyjafjallajökull rumbled to life, another Iceland volcano began spewing ash and steam. At approximately 17:...

NASA Earth Observato Dust over Iran, Afghanistan, and Pakistan: Acquired May 31, 2011, this natural-color ima...

NASA Earth Observato Dust over Iran, Afghanista...

earthobservatory.nasa.gov 01 Jun '11, 7pm

Dust plumes blew over southwestern Asia at the end of May 2011. On May 31, the Moderate Resolution Imaging Spectroradiomet...