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Introduction, Background and Data

The GSI has been developed to analyze chemical observations, such as MODIS AOD or PM2.5, to improve the pollution forecast with chemical models. In this release, GSI can do the following chemical analyses:

Chemical Model: WRF-Chem, CMAQ

Background Species: GOCART, PM2.5, CMAQ

Observations: MODIS AOD, PM2.5

Please check the Download Practice Data section if need to obtain the background and observation files.