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Near-real-time AIRS imagery of Volcanic Ashes over Iceland
AIRS visible image from April 15, 2010 showing a massive ash cloud from the eruption of the Eyjafjallajökull volcano in Iceland.
AIRS false-color 3-km visible image
AIRS visible image from April 15, 2010 showing a massive ash cloud from the eruption of the Eyjafjallajökull volcano in Iceland. The volcanic eruption caused cancellation of flights between U.S. and northern Europe and shut down of major airports in Britain, Iceland and Northern Scandinavia.
The Atmospheric Infrared Sounder (AIRS) provides near-real-time (NRT) data that allows the observation of events like these while they are happening, with the data available just hours after the satellite passes over a particular region. The data is provided via the GES DISC's Web Map Service (WMS). Successive AIRS images in the AIRS image gallery provide a daily look at the progression of this event over Northern Europe.
Full-resolution (3-km) AIRS Near-Real-TIme false-color imagery, and CALIPSO expedited browse, both in the GoogleEarth's KMZ format, can be downloaded from here: (11 MB)
AIRS false-color 3-km visible image (left),and the SO2 brightness temperature difference at 10-km resolution, April 15, 2010. BT_diff_SO2 is brightness temperature difference Tb (1361.44 cm-1)-Tb (1433.06 cm-1) used as an indicator of SO2 release from volcanoes. Values under -6K have likely volcanic SO2. Information from multiple sensors indicates that this eruption is mostly ash with little SO2 being expelled into the atmosphere. Images are served through GES DISC AIRS NRT web-map service, and are accessible using GoogleEarth client. For more information on AIRS NRT data, please see the following link, http://disc.sci.gsfc.nasa.gov/nrt/data-holdings/airs-nrt-products/airs-nrt-products#WMS.