Composition and Chemistry
Experiments with the assimilation of fine aerosols using an ensemble Kalman filter
Article first published online: 8 NOV 2012
©2012. American Geophysical Union. All Rights Reserved.
Journal of Geophysical Research: Atmospheres (1984–2012)
Volume 117, Issue D21, 16 November 2012
How to Cite
2012), Experiments with the assimilation of fine aerosols using an ensemble Kalman filter, J. Geophys. Res., 117, D21302, doi:10.1029/2012JD018333., and (
- Issue published online: 8 NOV 2012
- Article first published online: 8 NOV 2012
- Manuscript Accepted: 28 SEP 2012
- Manuscript Revised: 19 SEP 2012
- Manuscript Received: 20 JUN 2012
 In a series of experiments we issue forecasts of fine aerosol concentration over the coterminous USA and southern Canada using the Weather Research and Forecasting – Chemistry model initialized with 3D-VAR or ensemble Kalman filter (EnKF) assimilation methods. Assimilated observations include surface measurements of fine aerosols from the United States Environmental Protection Agency AIRNow Data Exchange program. Evaluation statistics calculated over a month-and-half-long summer period demonstrate the advantage of EnKF over 3D-VAR and point to the limitations of applying a simple aerosol parameterization for predicting air quality over the forecast area. Strategies for further improvement of forecasting aerosol concentrations are discussed.