Dissertations and Theses

Date of Award


Document Type




First Advisor

Barry Gross


Atmospheric, NOAA, Rapid Refresh, AIRS Mission, aerosol retrieval


There is a need to be able to estimate the relative humidity in the Planetary Boundary Layer (PBL) since relative humidity can affect aerosol retrieval. Satellite retrievals of Relative Humidity are extremely complicated since they need to resolve 1km vertical resolution for temperature and water vapor. The AIRS hyperspectral sensor may be able to retrieve relative humidity with 20% RMSE but low correlations with R2 – 0.4. The alternative is to explore meteorological forecasts (i.e. Rapid Refresh) to see if we can use them in the processing stream for aerosols. While the state of delay zero is assimilated, the following forecasts for large enough delay can be used to provide PBL integrated RH that can be used in modified aerosol retrieval models to modify aerosol models and/or provide useful diagnostic flags during the retrieval. We find that even for 18 hr. forecasts, the RMSE errors are < 15% which is significantly better that AIRS sensor retrievals.



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