How the evolution of Aerosols are accounted in Thompson Aerosol Aware Scheme?

[KL.ARUN]

I am trying to simulate a rainfall event using the Aerosol-Aware Thompson microphysics scheme. I understand that aerosol concentrations can decrease over the course of the simulation as they are consumed as CCN and IN from the supplied initial condition of aerosols from climatology. I want to know how aerosols can increase during the simulation. Specifically, how does the model represent any increase in aerosol concentrations over time when the sources are only given initially?, Thank you in advance

 

[kwerner]

Hi,
If you haven't already, see this web page with a brief description of the option. There are also noted references to literature that may discuss the scheme in more detail. Additionally, this is the primary publication on the scheme, itself. Hopefully those will be helpful.

 

[KL.ARUN]

Hello,
Thank you for your reply. I had already went through the article you mentioned, which indicates that the emission is represented by a simple equation which based on initial aerosol concentration (Picture below) and applied at the lowest model level. However, I was curious while going through another study which showed increase of IFA at some levels after 12hr precipitation which is only possible if there is advection or significant emission if I'm not wrong. Can you please give some insights on this?

Article Mentioned: Redirecting

 

[kwerner]

By IFA, do you mean ice nuclei? If so, there is no source of that in the basic WRF. To produce this, you would likely need a dust model and some kind of conversion to IFA. WRF has a dust model, but no conversion that, unfortunately