Support for Volcano Ash Advisory Centres (VAAC)
GOME-2 Absorbing Aerosol Index

The Absorbing Aerosol Index (AAI) indicates the presence of elevated absorbing aerosols in the Earth's atmosphere. The aerosol types that are mostly seen in the AAI are desert dust, biomass burning and volcano ash aerosols. The AAIs provided here are derived from the reflectances measured by GOME-2 at 340 and 380 nm (from the Science Channels). The pictures below are updated every 15 minutes and present the most recent AAI measurements obtained from GOME-2 on MetOP-A from O3MSAF data.

Please note that there is sun glint (reflection from the sun on water surfaces to the satellite) and that this shows up as increased AAI values in the eastern one-third of the swath.

VAAC Regions: Link to VAAC:

Global

Europe

Anchorage Advisories

Buenos Aires Advisories

Darwin Advisories

London Advisories

Montreal Advisories

Tokyo Advisories

Toulouse Advisories

Washington Advisories

Wellington Advisories

Global

Archive Global:2008 2009 2010 2011 2012 2013	Archive Global (Unfiltered): 2008 2009 2010 2011 2012 2013

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Europe

Archive Europe:2010 2011 2012 2013	Archive Europe (Unfiltered): 2010 2011 2012 2013

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Area VAAC Anchorage

Archive Anchorage_Entire_Region:2010 2011 2012 2013	Archive Anchorage_Entire_Region (Unfiltered): 2010 2011 2012 2013

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Area VAAC Buenos Aires

Archive Buenos_Aires_Entire_Region:2010 2011 2012 2013	Archive Buenos_Aires_Entire_Region (Unfiltered): 2010 2011 2012 2013

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Area VAAC Darwin

Archive Darwin_Entire_Region:2010 2011 2012 2013	Archive Darwin_Entire_Region (Unfiltered): 2010 2011 2012 2013
Archive Sumatra_Andaman_Is: 2010 2011 2012 2013	Archive Sumatra_Andaman_Is(Unfiltered): 2010 2011 2012 2013
Archive Java_Sulawesi: 2010 2011 2012 2013	Archive Java_Sulawesi(Unfiltered): 2010 2011 2012 2013
Archive Philippines: 2010 2011 2012 2013	Archive Philippines(Unfiltered): 2010 2011 2012 2013
Archive Papua_New_Guinea: 2010 2011 2012 2013	Archive Papua_New_Guinea(Unfiltered): 2010 2011 2012 2013

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Area VAAC London

Archive London_Entire_Region:2010 2011 2012 2013	Archive London_Entire_Region (Unfiltered): 2010 2011 2012 2013

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Area VAAC Montreal

Archive Montreal_Entire_Region:2010 2011 2012 2013	Archive Montreal_Entire_Region (Unfiltered): 2010 2011 2012 2013

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Area VAAC Tokyo

Archive Tokyo_Entire_Region:2010 2011 2012 2013	Archive Tokyo_Entire_Region (Unfiltered): 2010 2011 2012 2013

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Area VAAC Toulouse

Archive Toulouse_Entire_Region:2010 2011 2012 2013	Archive Toulouse_Entire_Region (Unfiltered): 2010 2011 2012 2013
Archive Toulouse_North: 2010 2011 2012 2013	Archive Toulouse_North(Unfiltered): 2010 2011 2012 2013
Archive Toulouse_South: 2010 2011 2012 2013	Archive Toulouse_South(Unfiltered): 2010 2011 2012 2013

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Area VAAC Washington

Archive Washington_Entire_Region:2010 2011 2012 2013	Archive Washington_Entire_Region (Unfiltered): 2010 2011 2012 2013
Archive Washington_Oceanic: 2010 2011 2012 2013	Archive Washington_Oceanic(Unfiltered): 2010 2011 2012 2013
Archive Washington_Continental: 2010 2011 2012 2013	Archive Washington_Continental(Unfiltered): 2010 2011 2012 2013

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Area VAAC Wellington

Archive Wellington_Entire_Region:2010 2011 2012 2013	Archive Wellington_Entire_Region (Unfiltered): 2010 2011 2012 2013

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The data of the GOME-2 Absorbing Aerosol Index are provided by KNMI in the framework of the EUMETSAT Satellite Application Facility on Ozone and Atmospheric Chemistry Monitoring (O3M SAF).

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Documentation :

• Algorithm Theoretical Basis Document
• Product Specification Document
• AAI Verification Document 2007-2011, issue 1/2012, 10 January 2012 [13 Mb!]
• M. de Graaf, P. Stammes, O. Torres, and R.B.A. Koelemeijer, Absorbing Aerosol Index: Sensitivity analysis, application to GOME and comparison with TOMS, J. Geophys. Res. 110, D010201, doi:10.1029/2004JD005178, 2005.

Related subjects

• TOMS aerosol index
• OMI aerosol index images
• MODIS aerosol product