WRF with tracers to simulate the dispersion of CO₂

[llsalazardom]

Hello, I'm interested in running WRF with tracers to simulate the dispersion of CO₂, but without including any chemical processes. Is it possible to do this without using WRF-Chem? Any guidance would be greatly appreciated.

 

[Ming Chen]

WRF has the option of tracer_opt, which activates a few pre-defined tracers. I suppose this option may be helpful for your CO2 dispersion study.

Please take a look at the WRF User's Guide for its application (Chapter 5: WRF Model).

 

[llsalazardom]

Hi, thank you for your help.
I’d like to ask: how can I find out which tracers are predefined? I want to understand what each tracer represents.

 

[Ming Chen]

Please take a look at the file "WRF/Registry/Registry.EM", in which you can find the following piece of code:

# Tracer Scalars: If you want full resolved and non-resolved dispersion, compile WRF-Chem


#


state   real    -          ikjftb  tracer        1         -     -    -


state   real    tr17_1     ikjftb  tracer        1         -     irhusdf=(bdy_interp:dt)    "tr17_1"         "tr17_1"     "Dimensionless"


state   real    tr17_2     ikjftb  tracer        1         -     irhusdf=(bdy_interp:dt)    "tr17_2"         "tr17_2"     "Dimensionless"


state   real    tr17_3     ikjftb  tracer        1         -     irhusdf=(bdy_interp:dt)    "tr17_3"         "tr17_3"     "Dimensionless"


state   real    tr17_4     ikjftb  tracer        1         -     irhusdf=(bdy_interp:dt)    "tr17_4"         "tr17_4"     "Dimensionless"


state   real    tr17_5     ikjftb  tracer        1         -     irhusdf=(bdy_interp:dt)    "tr17_5"         "tr17_5"     "Dimensionless"


state   real    tr17_6     ikjftb  tracer        1         -     irhusdf=(bdy_interp:dt)    "tr17_6"         "tr17_6"     "Dimensionless"


state   real    tr17_7     ikjftb  tracer        1         -     irhusdf=(bdy_interp:dt)    "tr17_7"         "tr17_7"     "Dimensionless"


state   real    tr17_8     ikjftb  tracer        1         -     irhusdf=(bdy_interp:dt)    "tr17_8"         "tr17_8"     "Dimensionless"

These are predefined tracers.