Monthly averaged column aerosol optical thickness

The monthly averaged aerosol optical thickness (under all sky conditions) from the GOCART model are given in GIF images or ASCII files.  If you would like to obtain the ASCII files, please send email to Mian Chin to obtain information on downloading the files.

(Click here for key information about the model, e.g., emission, transport, and optical thickness calculations).
(Click here for latitude-longitude information of the model output).

• 1990  [ image ] [ obtain file ]
• 1996  [ image ] [ obtain file ]
• 1997  [ image ] [ obtain file ]
• 2000  [ image ] [ obtain file ]
• 2001  [ image ] [ obtain file ]
• 2002  [ image ] [ obtain file ]

Total aerosol optical thicknesses at 500 nm compared with:

• Satellite retrieval from TOMS, 1997
• Satellite retrieval from AVHRR, 1990
• Sunphotometer measurements from AERONET

If you plan to use any of the model results here, please contact ( Mian.Chin@nasa.gov ) and cite appropriate References.