Bridging the last few kilometers: Accounting for Subgrid mixing and spatial gradients in global aerosol models

Lead PI: Dr. Susanne E. Bauer

Unit Affiliation: Center for Climate Systems Research (CCSR)

August 2009 - August 2014
Global ; New York ; Illinois
Project Type: Research

DESCRIPTION: Global models are beginning to include processes that depend on detailed aerosol properties to better represent direct and indirect climate forcing. New aerosol representations include aerosol number, surface area, composition, and mixing state. However, since these properties are not given for emissions, the aerosol fields are not initialized correctly, nor is near-source evolution represented properly. Changes in aerosol properties occur over distances that are small compared to a global model grid box.

OUTCOMES: The goal of the project “Bridging the Last Few Kilometers” is representing critical, climate-relevant microphysical properties of aerosols for appropriate use in global models. The two partners in the project are the University of Illinois, working on modeling of aerosol evolution immediately after emission, and NASA-Goddard Institute for Space Studies, implementing aerosol microphysics in a global model and testing global sensitivities.


University of Illinois, Board of Trustees


National Aeronautics & Space Administration




climate forcing global climate models aerosols climate and society


Modeling and Adapting to Future Climate