Aerosol Discussion Points

for the 12th Annual CCSM Workshop

General

What are the candidate treatments of oxidant chemistry and aerosols?
Should more than one be supported on the trunk? For how long?

Discrimination of Schemes

Do aerosols have to be simulated online to simulate direct and indirect effects?
Which oxidant chemistry needs to be treated to simulate direct and indirect effects?
How important is ammonia nitrate in the past/present/future?
What are the trade-offs between run time and realism in different representations of oxidant chemistry and aerosol physics?

Emissions

Which aerosol sources are missing?
Can aerosol sources be treated independently of the representation of aerosol mixing state and size distribution? What simplifications in the representation of the aerosol mixing state and size distribution are acceptable?

Dust and Seasalt

How should these be binned to interact with the microphysics

What interfaces can be introduced that will facilitate the application of aerosol modules to the CCSM to treat:

Dependence of emissions on surface properties and processes
Dependence of dry deposition on surface properties
Gas-to-particle production of aerosol in clear air
Activation, aqueous-phase production and wet scavenging of aerosol (cloud-aerosol interactions)
Optical properties of aerosol

Evaluation:

Which aerosol measurements would be most useful for validation?
Should the aerosol scheme(s) be represented in Aerocom?.

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Last updated: 5/1/2007 EAD

CCSM is sponsored by the National Science Foundation (NSF) and the U.S. Department of Energy (DOE). CCSM is a project within the Climate & Global Dynamics Division (CGD) of the Earth and Sun Systems Laboratory (ESSL) at the National Center for Atmospheric Research (NCAR). NCAR is managed by the University Corporation for Atmospheric Research (UCAR).