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Absorbing Aerosol Index |
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monitoring |
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O3
- global - tropical NO2 - global - central Europe CH2O - global SO2 - global Aerosol - global - european - aerosol index Clouds - cloud fraction & top pressure |
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monitoring |
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monitoring |
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Aviation control |
09 February 2010
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 and biomass burning aerosols. The
AAIs provided here are derived from the reflectances measured by GOME-1
at 335 and 380 nm, from the reflectances measured by OMI at 331 and 360
nm, and from the reflectances measured by SCIAMACHY and GOME-2 at 340
and 380 nm. The pictures below present the most recent AAI measurements
obtained by SCIAMACHY and GOME-2. Below these there are links to all the
aerosol data products that are currently available.
Latest results from SCIAMACHY and GOME-2
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| Latest Absorbing Aerosol Index (AAI) results obtained by SCIAMACHY (left) and GOME-2 (right) |
Archives
The GOME-1 AAI is available from July 1995 to December 2000. Currently, degradation of the GOME UV channels prevents derivation of the AAI for more recent years.The SCIAMACHY AAI is derived daily since July 2002. Sunglint situations and solar eclipse events are identified and flagged, and observations with too high solar zenith angles are filtered out. The algorithm corrects for the radiometric calibration problem of SCIAMACHY. Due to radiometric degradation of the SCIAMACHY UV channels, the AAI values used to be anomalously high for data measured since about the end of 2004. This problem has been solved and current data can be used without restrictions.
The OMI AAI is available since October 2004 and runs in near-real-time. Sunglint situations are filtered out.
The GOME-2 AAI has become fully operational since January 2010. Data are available from 2007 on.
SCIAMACHY Absorbing Aerosol Index
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AAI monthly images:
AAI monthly data files: AAI daily gridded data: AAI daily level-2 data: AAI daily images: AAI daily log files: |
2002
| 2002 | 2002 | 2002 | 2002 | 2002 | |
2003
| 2003 | 2003 | 2003 | 2003 | 2003 | |
2004
| 2004 | 2004 | 2004 | 2004 | 2004 | |
2005
| 2005 | 2005 | 2005 | 2005 | 2005 | |
2006
| 2006 | 2006 | 2006 | 2006 | 2006 | |
2007
| 2007 | 2007 | 2007 | 2007 | 2007 | |
2008
| 2008 | 2008 | 2008 | 2008 | 2008 | |
2009
| 2009 | 2009 | 2009 | 2009 | 2009 | |
2010
2010 2010 2010 2010 2010 |
The SCIAMACHY daily data are available in two flavours:
- Gridded global daily data for users that are familiar with the TOMS AAI data format
- Level-2 data with AAI, time, and geolocation information (ASCII data format)
Reprocessed SCIAMACHY AAI data based on data processor versions SCIA/6.02 and SCIA/6.03, including the official m-factor correction and an additional scan-angle dependent degradation correction, are now available for the entire mission.
22 January 2010: Release of software version 4.1. Most important
features:
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Citation
When the data are used in scientific publications, please refer to the following publication:
L.G. Tilstra, M. de Graaf, I. Aben, and P. Stammes, Analysis of 5 years of SCIAMACHY Absorbing Aerosol Index data, Proceedings of the 2007 Envisat Symposium, ESA Special Publication SP-636, 2007. (PDF file)
Documentation :
- M. de Graaf, L.G. Tilstra, and P. Stammes, SCIAMACHY Absorbing Aerosol Index: The scientific product compared to the operational product and TOMS data, Proceedings of the Second Workshop on the Atmospheric Chemistry Validation of ENVISAT (ACVE-2), ESA Special Publication SP-562, 2004. (PDF file)
- M. de Graaf and P. Stammes, SCIAMACHY Absorbing Aerosol Index - calibration issues and global results from 2002-2004, Atmos. Chem. Phys. 5, 2385-2394, SRef-ID:1680-7324/acp/2005-5-2385, 2005. (PDF file)
- L.G. Tilstra, M. de Graaf, S. Noël, I. Aben, and P. Stammes, SCIAMACHY's Absorbing Aerosol Index and the consequences of instrument degradation, Proceedings of the Third Workshop on the Atmospheric Chemistry Validation of ENVISAT (ACVE-3), ESA Special Publication SP-642, 2007. (PDF file)
- L.G. Tilstra, M. de Graaf, I. Aben, and P. Stammes, Analysis of 5 years of SCIAMACHY Absorbing Aerosol Index data, Proceedings of the 2007 Envisat Symposium, ESA Special Publication SP-636, 2007. (PDF file)
GOME-1 Absorbing Aerosol Index
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AAI monthly images:
AAI monthly data files: AAI daily data files: |
1995
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1996
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1997
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1998
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1999
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2000
1995 | 1996 | 1997 | 1998 | 1999 | 2000 1995 | 1996 | 1997 | 1998 | 1999 | 2000 |
Citation
When the data are used in scientific publications, please refer to the following publication:
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.
Documentation :
- 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.
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AAI daily images:
AAI daily data files: |
2004
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2005
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2006
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2007
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2008
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2009
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2010
2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
Documentation :
GOME-2 Absorbing Aerosol Index
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AAI daily images:
AAI daily data files: |
2007
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2008
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2009
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2010
2007 | 2008 | 2009 | 2010 |
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).
22 January 2010: All GOME-2 years are covered, near-NRT processing is
up and running. Some restrictions apply:
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Citation
When the data are used in scientific publications, please refer to the following publication:
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.
Documentation :
- AAI Verification Document 2007-2008, issue 1c/2009, 9 October 2009 [20 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.
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